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PUB 102
CODE OF SIGNALS
FOR VISUAL SOUND AND RADIO UNITED STATES EDITION
1969 Edition
Revised 2003
NATIONAL IMAGERY AND MAPPING AGENCY
PUB 102
International Code of Signals
As adopted by the Fourth Assembly of the Maritime
Consultative Organization in 1965
For Visual Sound and Radio United States Edition 1969
Revised 2003
Prepared and published by the
NATIONAL IMAGERY AND MAPPING AGENCY
Bethesda Maryland
COPYRIGHT 2003 BY THE UNITED STATES GOVERNMENT
NO COPYRIGHT CLAIMED UNDER TITLE 17 USC
For sale by the of Documents US Government Printing Office
Internet Phone toll free 866 5121800 DC area 202 5121800
Fax 202 5122250 Mail Stop SSOP Washington DC 204020001
PREFACE
Pub 102 the 1969 edition of the International Code of Signals became effective on 1 April 1969 and at that HO Pubs 103 and 104 International Code of
Signals Volumes I and II All signals are contained in a single
volume suitable for all methods of The First International Code was drafted in 1855 by a Committee set up by the British Board of Trade It
contained using eighteen flags and was published by the British Board of Trade in 1857 in two parts the first and international signals and the
second British signals only The book was adopted by most seafaring nations
This early edition was revised by a Committee set up in 1887 by the British Board of Trade The Committees discussed by the principal maritime powers
and at the International Conference in Washington in 1889 As a result
many changes were made The Code was completed in 1897 and was distributed to all maritime powers That edition of
the International Code of Signals however did not stand the test of World War I
The International Conference at Washington in 1927 considered proposals for a new revision of the Code
and decided that it should be prepared in seven languages namely in English French Italian German Japanese Spanish
and in one Scandinavian language which was chosen by the Scandinavian Governments to be the Norwegian language The
new edition was completed in 1930 and was adopted by the International Conference held in Madrid in
1932 The new Code was compiled in two volumes one for use by visual signaling and the other by Words
and phrases applicable to aircraft were introduced in Volume II together with a complete Medical Section and a Code the granting of pratique The
Medical Section and the pratique signals were prepared with the assistance and
by the advice of the Office International dHygiene Publique The Code particularly Volume II was primarily intended for
use by ships and aircraft and via coastal radio stations between ships or aircraft and authorities ashore A certain number
of signals were inserted for with shipowners agents repair yards etc The same Conference established a Standing Committee to review the Code if and
when necessary to give guidance on questions of use
and procedure and to consider proposals for Secretarial duties were undertaken by the Government of the
United Kingdom The Standing Committee met only once in 1933 and introduced certain additions and amendments
The Radio Conference of the International Union suggested in 1947 that Code of Signals should fall within the competence of the Maritime IMCO In
January 1959 the First Assembly of IMCO decided that the Organization should assume all the
functions then being performed by the Standing Committee of the International Code of Signals The Second Assembly in
1961 endorsed plans for a comprehensive review of the International Code of Signals intended to meet the present of mariners A Subcommittee of the
Maritime Safety Committee of the Organization was established to revise
the Code to prepare it in nine languages namely the original seven English French Italian German Japanese Spanish
and Norwegian together with Russian and Greek and to consider proposals for a new Code and its relation
to the International Code of Signals The Subcommittee consisted of of the following countries France Greece Italy Japan Norway Russian Federation
United Kingdom and the United States of America
The following international governmental and organizations contributed to and assisted in of the revised Code the International Atomic Energy Agency
the International Civil Aviation International Labor Organization the International Union the World World Health Organization the International
Chamber of Shipping the International Confederation of Free Trade
Unions and the International Radio Maritime Committee
The Subcommittee completed the revision of the Code in 1964 taking into account 42 of the on Safety of Life at Sea and 22 of the Radio Conference
Geneva 1959 The
Code was adopted by the Fourth Assembly of IMCO in 1965
The revised Code is intended to cater primarily for situations related essentially to safety of navigation and when language difficulties arise It is
suitable for transmission by all means of and thus obviating the necessity for a separate Code and dispensing with
Volume II for The revised Code embodies the principle that each signal has a complete meaning It thus
leaves out the vocabulary method which was part of the old Code The Geographical Section not being was omitted By these means it was possible to
reduce considerably the volume of the Code and Changes and corrections for this product will appear in the NIMA weekly Notice to Mariners and must
be applied to keep
it current Users should refer information and comments to MARITIME SAFETY INFORMATION DIVISION ST D 44
NATIONAL IMAGERY AND MAPPING AGENCY 4600 SANGAMORE ROAD BETHESDA MD
iii
CONTENTS
PAGE
CHAPTER 1SIGNALING INSTRUCTIONS 1
CHAPTER 2 GENERAL SIGNAL CODE 27
CHAPTER 3MEDICAL SIGNAL CODE 105
CHAPTER 4DISTRESS AND LIFESAVING SIGNALS AND
PROCEDURES USRussia Supplementary Signals for Naval Vessels 151
INDEXES 153
Index for Signaling Instructions and General Signal Code 155
Index for Medical Signal Code 159
CHAPTER 1
CHAPTER 1
SIGNALING INSTRUCTIONS
PAGE
SECTION 1 EXPLANATION AND GENERAL REMARKS 3
SECTION 2 DEFINITIONS 4
SECTION 3 METHODS OF SIGNALING 5
SECTION 4 GENERAL INSTRUCTIONS 6
SECTION 5 FLAG SIGNALING 9
SECTION 6 FLASHING LIGHT SIGNALING 11
SECTION 7 SOUND SIGNALING 13
SECTION 8 14
SECTION 9 SIGNALING BY HAND FLAGS OR ARMS 15
MORSE SIGNALING BY HAND FLAGS OR ARMS 15
SECTION 10 MORSE SIGNALS 17
MORSE SYMBOLS 17
PROCEDURE SIGNALS 20
SINGLE LETTER SIGNALS 22
SINGLE LETTER SIGNALS WITH COMPLEMENTS 23
SINGLE LETTER SIGNALS BETWEEN ICEBREAKER AND ASSISTED VESSELS 24
CHAPTER 1
SECTION 1 EXPLANATION AND GENERAL REMARKS
1 The purpose of the International Code of Signals is to provide ways and means of communication in situations related essen
tially to safety of navigation and persons especially when language difficulties arise In the preparation of the Code account
was taken of the fact that wide application of and can provide simple and effective means in plain language whenever language difficulties do not
exist
2 The signals used consist of
a Singleletter signals allocated to which are very urgent important or of very common use
b Twoletter signals for General Signal Code Chapter 2 Pages 29 through 104
c Threeletter signals beginning with M for Medical Signal Code Chapter 3 pages 107 through 135
3 The Code follows the basic principle that each signal should have a complete meaning This principle is followed Code in certain cases complements
are used where necessary to supplement the available groups
4 Complements express
a Variations in the meaning of the basic signal
Examples
CP I am or vessel indicated is proceeding to your assistance
CP 1 SAR aircraft is coming to your assistance
b Questions concerning the same basic subject or basic signal
Examples
DY Vessel name or identity signal has sunk in lat long
DY 4 What is the depth of water where vessel sank
c Answers to a question or request made by the basic signal
Examples
HX Have you received any damage in collision
HX 1 I have received serious damage above the waterline
d specific or detailed information
Examples
IN I require a diver
IN 1 I require a diver to clear Complements appearing in the text more than once have been grouped in three tables These tables should be used only
and when specified in the text of the signals
6 Text in brackets indicates
a an alternative eg or survival craft
b information which may be transmitted if it is required or if it is available eg position to be indicated if necessary
c an explanation of the text
7 The material is classified according to subject and meaning Extensive cross referencing of the signals in the righthand col
umn is used to facilitate coding
CHAPTER 1
SECTION 2 the purpose of this Code the following terms shall have the meanings defined signaling is any method of the transmission of which is
capable of being seen
Sound signaling is any method of passing Morse signals by means of siren whistle foghorn bell or other sound is the authority who orders a signal to
be signal or call sign is the group of letters and figures assigned to each station by its means a ship aircraft survival craft or any place at
which can be effected by any of origin is that station where the originator submits a signal for transmission irrespective of the method of com
munication station is the station by which a signal is actually being is the authority to whom a signal is of destination is that station in which
the signal is finally received by the station is the station by which a signal is actually being denotes the rules drawn up for the conduct of
signal is a signal designed to facilitate the conduct of signaling See Chapter 1 Section 10 Pages 17 20 and 21
Time of origin is the time at which a signal is ordered to be made
Group denotes more than one continuous letter andor numeral which together compose a signal
A numeral group consists of one or more numerals
A hoist consists of one or more groups displayed from a single halyard A hoist or signal is said to be at the dip when it is
hoisted about half of the full extent of the halyards A hoist or signal is said to be close up when it is hoisted to the full
extent of the is a length of halyard about 2 m 6 ft long used to separate each group of CHAPTER 1
SECTION 3 METHODS OF SIGNALING
1 The methods of signaling which may be used are
a Flag signaling the flags used being those shown inside the front cover
b Flashing light signaling using the Morse symbols shown in Chapter 1 Section 10 Page 17
c Sound signaling using the Morse symbols shown in Chapter 1 Section 10 Page 17
d Voice over a loud hailer
e f g Morse signaling by hand flags or arms
Flag signaling
2 A set of signal flags consists of twentysix alphabetical flags ten numeral pennants three substitutes and the answering pen
nant Detailed instructions for signaling by flags are given in Chapter 1 Section 5 Pages 9 and 10
Flashing light and sound signaling
3 The Morse symbols representing letters numerals etc are expressed by dots and dashes which are signaled either singly or
in combination The dots and dashes and spaces between them should be made to bear the following ratio one to another as
regards their duration
a A dot is taken as the unit
b A dash is equivalent to three units
c The space of time between any two elements of a symbol is equivalent to one unit between two complete symbols it is
equivalent to three units and between two words or groups it is equivalent to seven units
4 In flashing light and sound signaling while generally obeying the instructions laid down here it is best to err on the side of
making the dots rather shorter in their proportion to the dashes as it then makes the distinction between the elements plainer
The standard rate of signaling by flashing light is to be regarded as forty letters per minute Detailed instructions for signaling
by flashing light and sound are given in Chapter 1 Sections 6 and 7 Pages 11 through 13
Voice over a loud hailer
5 Whenever possible plain language should be used but where a language difficulty exists groups from the International Code
of Signals could be transmitted using the phonetic spelling and When or is used for the transmission of signals operators should comply with the
Radio Reg
ulations of the International Union then in force See in Chapter 1 Section 8 Page 14
CHAPTER 1
SECTION 4 GENERAL and addressee of message
1 Unless otherwise indicated all signals between vessels are made from the Master of the vessel of origin to the Master of the
vessel of of ships and aircraft
2 Identity signals for ships and aircraft are allocated on an international basis The identity signal may therefore indicate of a ship or of
identity signals
3 Identity signals may be used for two purposes
a to speak to or call a station
b to speak of or indicate a station
Examples
YP LABC I wish to communicate with vessel LABC by Complements Table 1 Chapter 2 Section 10 Page
HY 1 LABC The vessel LABC with which I have been in collision has resumed her of vessels andor places
4 Names of vessels andor places are to be spelled out
Example
RV Gibraltar You should proceed to to signal numbers
5 Instructions for signaling numbers
a Numbers are to be signaled as follows
i Flag signaling by the numeral pennants of the Code
ii Flashing light or sound signaling usually by the numerals in the Morse Code they may also be spelled out
iii or loud hailer by the Code words of the Figure Spelling Table in Chapter 1 Section 10 Page 19
b Figures which form part of the basic signification of a signal are to be sent together with the basic group
Examples
DI 20 I require boats for 20 persons
FJ 2 Position of accident or survival craft is marked by sea marker
c A decimal point between numerals is to be signaled as follows
i Flag signaling by inserting the answering pennant where it is desired to express the decimal point
ii Flashing light and sound signaling by decimal point signal AAA
iii Voice by use of the word DECIMAL as indicated in the Figure Spelling Table
d Wherever the text allows depths etc to be signaled in feet or in meters the figures should be followed by F to indicate
feet or by M to indicate or bearing
6 They are to be expressed in three figures denoting degrees from 000 to 359 measured clockwise If there is any confusion they should be preceded by
the letter A They are always to be true unless expressly stated to be otherwise in
the context
Examples
LW 005 I receive your transmission on bearing 005
LT A120 T1540 Your bearing from me is 120 at local time 1540
SECTION 4GENERAL Course is to be expressed in three numerals denoting degrees from 000 to 359 measured clockwise If there is any confusion they
should be preceded by the letter C They are always to be true unless expressly stated to be otherwise in
the context
Examples
MD 025 My course is 025
GR C240 S18 Vessel coming to your rescue is steering course 240 speed 18 Dates are to be signaled by two four or six numerals preceded by the letter
D The first two numerals indicate the day of
the month When they are used alone they refer to the current month
Example
D15 transmitted on the 15th or any other date in April means 15 April
The two numerals which follow indicate the month of the year
Example
D1504 means 15 April
Where necessary the year may be indicated by two further numerals
Example
D181063 means 18 October Latitude is expressed by four figures preceded by the Letter L The first two figures denote the degrees and the last two
the minutes The letters N North or S South follow if they are needed however for reasons of simplicity they may be
omitted if there is no risk of confusion
Example
L3740S Latitude Longitude is expressed by four or if necessary five figures preceded by the letter G The first two or three figures de
note the degrees and the last two the minutes When the longitude is more than 99 no confusion will normally arise if the hundreds of degrees is
omitted However where it is necessary to avoid confusion the five figures should be used
The letters E East or W West follow if they are needed otherwise they may be omitted as in the case of latitude
Example
G13925E Longitude 13925 E
A signal requiring the indication of position to complete its signification should be signaled as follows
CH L2537N G4015W Vessel indicated is reported as requiring assistance in lat 2537 N long 4015 Figures preceded by the letter R indicate distance in
nautical miles
Example
OV A080 R10 Mines is are believed to be bearing 080 from me distance 10 miles
The letter R may be omitted if there is no possibility of Speed is indicated by figures preceded by
a the letter S to denote speed in knots or
b the letter V to denote speed in kilometers per hour
CHAPTER 1SIGNALING Examples
BQ S300 The speed of my aircraft in relation to the surface of the earth is 300 knots
BQ V300 The speed of my aircraft in relation to the surface of the earth is 300 kilometers per Times are to be expressed in four figures of which
the first two denote the hour from 00 midnight up to 23 11 pm and
the last two denote the minutes from 00 to 59 The figures are preceded by
a the letter T indicating Local time or
b the letter Z indicating Greenwich Mean Time
Examples
BH T1045 L2015N G3840W C125 I sighted an aircraft at local time 1045 in lat 2015 N long 3840 W flying
on course 125
RX Z0830 You should proceed at GMT 0830
Time of origin
14 The time of origin may be added at the end of the text It should be given to the nearest minute and expressed by four from indicating at what time
a signal originated it also serves as a convenient reference by local signal codes
15 If a vessel or a coast station wishes to make a signal in a local code the signal YV 1 The groups which follow are from
the local code should precede the local signal if it is necessary in order to avoid CHAPTER 1
SECTION 5 FLAG SIGNALING
1 As a general rule only one hoist should be shown at a time Each hoist or group of hoists should be kept flying until it has
been answered by the receiving station see paragraph 3 When more groups than one are shown on the same halyard they must
be separated by a tackline The transmitting station should always hoist the signal where it can be most easily seen by the re
ceiving station that is in such a position that the flags will blow out clear and be free from smoke
How to call
2 The identity signal of the stations addressed is to be hoisted with the signal see Chapter 1 Section 4 Paragraph 3 Page 6
If no identity signal is hoisted it will be understood that the signal is addressed to all stations within visual signaling distance
If it is not possible to determine the identity signal of the station to which it is desired to signal the group VF You should
hoist your identity signal or CS What is the name or identity signal of your vessel or station should be hoisted first
at the same time the station will hoist its own identity signal The group YQ I wish to communicate by 1 Chapter 2 Section 10 Page 104 with vessel
bearing from me can also be used
How to answer signals
3 All stations to which signals are addressed or which are indicated in signals are to hoist the answering pennant at the dip as
soon as they see each hoist and close up immediately when they understand it it is to be lowered to the dip as soon as the hoist
is hauled down at the transmitting station being hoisted close up again as soon as the next hoist is to complete a signal
4 The transmitting station is to hoist the answering pennant singly after the last hoist of the signal to indicate that the signal is
completed The receiving station is to answer this in a similar manner to all other hoists see paragraph 3 on this page
How to act when signals are not understood
5 If the receiving station cannot clearly distinguish the signal made to it it is to keep the answering pennant at the dip If it the signal but
cannot understand the meaning of it it can hoist the following signals ZQ Your signal coded You should check and repeat the whole or ZL Your signal
has been received but not use of The use of substitutes is to enable the same signal flag either alphabetical flag or numeral pennant to be repeated
one or more times in
the same group in case only one set of flags is carried on board The first substitute always repeats the uppermost signal flag of that class
of flags which immediately precedes the substitute The second substitute always repeats the second and the third substitute repeats the
third signal flag counting from the top of that class of flags which immediately precedes them No substitute can ever be used more than
once in the same group The answering pennant when used as a decimal point is to be disregarded in determining which substitute to use
Example
The signal VV would be made as follows
first substitute
The number 1100 would be made by numeral pennants as follows
first substitute
third substitute
The signal L 2330 would be made as follows
second substitute
In this case the second substitute follows a numeral pennant and therefore it can only repeat the second numeral in the group
CHAPTER 1SIGNALING to spell
7 Names in the text of a signal are to be spelled out by means of the alphabetical flags The signal YZ The words which
follow are in plain language can be used if of the Code pennant by ships of war
8 When a ship of war wishes to communicate with a merchant vessel she will hoist the Code pennant in a conspicuous position
and keep it flying during the whole of the time the signal is being CHAPTER 1
SECTION 6 FLASHING LIGHT SIGNALING
1 A signal made by flashing light is divided into the following parts
a The callIt consists of the general call or the identity signal of the station to be called It is answered by the answering
signal
b The transmitting station makes DE followed by its identity signal or name This will be repeated back
by the receiving station which then signals its own identity signal or name This will also be repeated back by the trans
mitting station
c The textThis consists of plain language or Code groups When Code groups are to be used they should be preceded
by the signal YU Words of plain language may also be in the text when the signal includes names places etc Receipt
of each word or group is acknowledged by T
d The endingIt consists of the ending signal AR which is answered by R
2 If the entire text is in plain language the same procedure is to be followed The call and identity may be omitted when two
stations have established and have already exchanged signals
3 A list of procedure signals appears in Chapter 1 Section 10 Pages 20 and 21 Although the use of these signals is the following notes might be found
useful
a The General call signal or call for unknown station AA AA AA etc is made to attract attention when wishing to
signal to all stations within visual signaling distance or to a station whose name or identity signal is not known The call
is continued until the station addressed answers
b The Answering signal TTTT etc is made to answer the call and it is to be continued until the transmitting station
ceases to make the call The transmission starts with the DE followed by the name or identity signal of the transmitting
station
c The letter T is used to indicate the receipt of each word or group
d The Erase signal EEEEEE etc is used to indicate that the last group or word was signaled incorrectly It is to be
answered with the erase signal When answered the transmitting station will repeat the last word or group which was
correctly signaled and then proceed with the remainder of the e The Repeat signal RPT is to be used as follows
i by the transmitting station to indicate that it is going to repeat I repeat If such a repetition does not follow imme
diately after RPT the signal should be interpreted as a request to the receiving station to repeat the signal received
Repeat what you have received
ii by the receiving station to request for a repetition of the signal transmitted Repeat what you have sent
iii The Special Repetition signals AA AB WA WB and BN are made by the receiving station as appro
priate In each case they are made immediately after the repeat signal RPT
Examples
RPT AB KLRepeat all before group KL
RPT BN boats survivors Repeat all between words boats and survivors
If a signal is not understood or when decoded it is not intelligible the repeat signal is not used The receiving station
must then make the appropriate signal from the Code eg Your signal has been received but not understood
f A correctly received repetition is acknowledged by the signal OK The same signal may be used as an affirmative
answer to a question It is correct
g The Ending signal AR is used in all cases to indicate the end of a signal or the end of the transmission The receiving
station answers with the signal R Received or I have received your last signal
h The transmitting station makes the signal CS when requesting the name or identity signal of the receiving station
i The Waiting signal or Period signal AS is to be used as follows
i When made independently or after the end of a signal it indicates that the other station must wait for further commu
nications waiting signal
ii When it is inserted between groups it serves to separate them period signal to avoid confusion
j The signal C should be used to indicate an affirmative statement or an affirmative reply to an interrogative signal the
signal RQ should be used to indicate a question For a negative reply to an interrogative signal or for a negative state
ment the signal N should be used in visual or sound signaling and the signal NO should be used for voice or radio
k When the signals N or NO and RQ are used to change an affirmative signal into a negative statement or into a
CHAPTER 1SIGNALING question respectively they should be transmitted after the main signal
Examples
CY N or NO as appropriate Boats isare not coming to you CW RQ Is boatraft on board
The signals C N or NO and RQ cannot be used in conjunction with singleletter CHAPTER 1
SECTION 7 SOUND SIGNALING
1 Owing to the nature of the apparatus used whistle siren foghorn etc sound signaling is necessarily slow Moreover the
misuse of sound signaling is of a nature to create serious confusion at sea Sound signaling in fog should therefore be reduced
to a minimum Signals other than the single letter signals should be used only in extreme emergency and never in waters
2 The signals should be made slowly and clearly They may be repeated if necessary but at sufficiently long intervals to ensure
that no confusion can arise and that one letter signals cannot be mistaken as twoletter groups
3 Masters are reminded that the one letter signals of the Code which are marked by an asterisk when made by sound may
only be made in compliance with the requirements of the International Regulations for Preventing Collisions at Sea Reference
is also made to the single letter signals provided for exclusive use between an icebreaker and assisted vessels
CHAPTER 1
SECTION 8 When using the International Code of Signals in cases of language difficulties the principles of the Radio Regulations of Union then in
force have to be observed Letters and figures are to be spelled in the phonetic spelling tables in Chapter 1 Section 10 Pages 18 through 20
2 When coast and ship stations are called the identity signals call signs or names shall be used
Method of calling
3 The call consists of
a The call sign or name of the station called not more than three times at each call
b The group DE DELTA ECHO
c The call sign or name of the calling station not more than three times at each names of stations should also be spelled After contact has been
established the call sign or name need not be sent
more than once
Form of reply to calls
4 The reply to calls consists of
a The call sign or name of the calling station not more than three times
b The group DE DELTA ECHO
c The call sign or name of the station called not more than three all stations in the vicinity
5 The group CQ CHARLIE QUEBEC shall be used but not more than three times at each call
6 In order to indicate that Code groups of the International Code of Signals are to follow the word INTERCO is to be in
serted Words of plain language may also be in the text when the signal includes names places etc In this case the group YZ
YANKEE ZULU is to be inserted if necessary
7 If the station called is unable to accept traffic immediately it should transmit the signal AS ALFA SIERRA adding the
duration of waiting times in minutes whenever possible
8 The receipt of a transmission is indicated by the signal R ROMEO
9 If the transmission is to be repeated in total or in part the signal RPT ROMEO PAPA TANGO shall be used as necessary by
AA ALFA ALFA all after
AB ALFA BRAVO all before
BN BRAVO NOVEMBER all between and
WA WHISKEY ALFA word or group after
WB WHISKEY BRAVO word or group before
10 The end of a transmission is indicated by the signal AR ALFA CHAPTER 1
SECTION 9 SIGNALING BY HAND FLAGS OR ARMS
MORSE SIGNALING BY HAND FLAGS OR ARMS
1 A station which desires to communicate with another station by Morse signaling by hand flags or arms may indicate the re
quirement by transmitting to that station the signal K1 by any method The call signal AA AA AA may be made instead
2 On receipt of the call the station addressed should make the answering signal or if unable to communicate by this means
should reply with the signal YS1 by any available method
3 The call signal AA AA AA and the signal T should be used respectively by the transmitting station and the Normally both arms should be used for
this method of transmission but in cases where this is difficult or impossible one arm
can be used
5 All signals will end with the ending signal AR
CHAPTER 1SIGNALING The space of time between dots and dashes and between letters groups or words should be such as to facilitate
CHAPTER 1
SECTION 10 MORSE SIGNALS
MORSE SYMBOLS
ALPHABET
A N
B O
C P
D Q
E R
F S
G T
H U
I V
J W
K X
L Y
M Z
NUMERALS
1 6
2 7
3 8
4 9
5 0
PROCEDURE SIGNALS
AR AAA
AS
CHAPTER 1SIGNALING PHONETIC TABLES
For the pronunciation of letters and figures by or by voice over a loud hailer
LETTER SPELLING TABLE
Letter Code Word A Alfa AL FAH
B Bravo BRAH VOH
C Charlie CHAR LEE or SHAR LEE
D Delta DELL TAH
E Echo ECK OH
F Foxtrot FOKS TROT
G Golf GOLF
H Hotel HOH TELL
I India IN DEE AH
J Juliett JEW LEE ETT
K Kilo KEY LOH
L Lima LEE MAH
M Mike MIKE
N November NO VEM BER
O Oscar OSS CAH
P Papa PAH PAH
Q Quebec KEH BECK
R Romeo ROW ME OH
S Sierra SEE AIR RAH
T Tango TANG GO
U Uniform YOU NEE FORM or OO NEE FORM
V Victor VIK TAH
W Whiskey WISS KEY
X Xray ECKS RAY
Y Yankee YANG KEY
Z Zulu ZOO LOO
Note The Boldfaced syllables are 10MORSE SIGNALS
FIGURE SPELLING TABLE
Figure or
Mark to be Code Word Transmitted
0 NADAZERO 1 UNAONE OONAHWUN
2 BISSOTWO 3 TERRATHREE 4 KARTEFOUR 5
PANTAFIVE 6 SOXISIX SOKSEESIX
7 SETTESEVEN 8 OKTOEIGHT OKTOHAIT
9 NOVENINE DECIMAL DECIMAL DAYSEEMAL
POINT
FULL STOP STOP
STOP
Note Each syllable should be equally emphasized The sec
ond component of each Code word is the Code word used in
the Aeronautical Mobile Service
CHAPTER 1SIGNALING PROCEDURE SIGNALS
A bar over the letters composing a signal denotes that the letters are to be made as one symbol
1 Signals for voice transmissions or loud hailer
Signal Pronunciation Meaning
Interco INTERCO International Code groups followss
Stop STOP Full stop
Decimal DAYSEEMAL Decimal point
Correction KORREKSHUN Cancel my last word or group The correct
word or group follows
2 Signals for flashing light AA AA AA Call for unknown station or general call
EEEEEE etc Erase signal
AAA Full stop or decimal point
TTTT etc Answering signal
T Word or group received
3 Signals for flags and CQ Call for unknown stations or general call to all stations
Note When this signal is used in voice transmission it should be
pronounced in accordance with the letter spelling table
4 Signals for use where appropriate in all forms of AA All after used after the Repeat signal RPT means
Repeat all after
AB All before used after the Repeat signal RPT means
Repeat all before
AR Ending signal or End of Transmission or signal
AS Waiting signal or period
BN All between and used after the Repeat signal RPT
means Repeat all between and
C or The significance of the previous group
should be read in the CS What is the name or identity signal of your vessel or station
DE From used to precede the name or identity signal of the
calling station
K I wish to communicate with you or Invitation to SECTION 10MORSE SIGNALS
NO NegativeNO or The significance of the previous group should
be read in the negative When used in voice transmission the
pronunciation should be NO
OK Acknowledging a correct repetition or It is correct
RQ or The significance of the previous group should
be read as a question
R Received or I have received your last signal
RPT Repeat signal I repeat or Repeat what you have sent or
Repeat what you have received
WA Word or group after used after the Repeat signal RPT
means Repeat word or group after
WB Word or group before used after the Repeat signal
RPT means Repeat word or group before
Notes
a The procedure signals C N NO and RQ cannot be used in conjunction with singleletter signals
b Signals on appear in Chapter 2 Section 8 Pages 100 through 102
c When these signals are used by voice transmission the letters should be pronounced in accordance with the table with the exception of NO
which in voice transmission should be pronounced as NO
CHAPTER 1SIGNALING SINGLE LETTER SIGNALS
May be made by any method of signaling
See Note 1 for those marked by an asterisk
A I have a diver down keep well clear at slow speed
B I am taking in or discharging or carrying dangerous goods
C Yes affirmative or The significance of the previous group should be read in the D Keep clear of me I am maneuvering with difficulty
E I am altering my course to starboard
F I am disabled communicate with me
G I require a pilot When made by fishing vessels operating in close proximity on the fishing grounds it means I
am hauling nets
H I have a pilot on board
I I am altering my course to port
J I am on fire and have dangerous cargo on board keep well clear of me or I am leaking dangerous cargo
K I wish to communicate with you
L You should stop your vessel instantly
M My vessel is stopped and making no way through the water
N No negative or The significance of the previous group should be read in the negative This signal may be given
only visually or by sound For voice or radio transmission the signal should be NO
O Man overboard
P In harborAll persons should report on board as the vessel is about to proceed to sea
At seaIt may be used by fishing vessels to mean My nets have come fast upon an obstruction It may also
be used as a sound to mean I require a pilot
Q My vessel is healthy and I request free pratique
S I am operating astern propulsion
T Keep clear of me I am engaged in pair trawling
U You are running into danger
V I require assistance
W I require medical assistance
X Stop carrying out your intentions and watch for my signals
Y I am dragging my anchor
Z I require a tug When made by fishing vessels operating in close proximity on the fishing grounds it means I am
shooting nets
Notes 1 Signals of letters marked by an asterisk when made by sound may only be made in compliance with the
requirements of the International Regulations for Preventing Collisions at Sea 1972
2 Signals K and S have special meanings as landing signals for small boats with crews or persons in dis
tress Convention for the Safety of Life at Sea 1974 Chapter V Regulation 16
SECTION 10MORSE SIGNALS
SINGLE LETTER SIGNALS WITH COMPLEMENTS
May be made by any method of three AZIMUTH or three two four or six numerals DATE
Gwith four or five LONGITUDE the last two numerals denote minutes and
the rest one numeral I wish to COMMUNICATE with you by Complements
Table 1 Chapter 2 Section 10 Page 104
Lwith four numerals LATITUDE the first two denote degrees and the rest min
one or more numerals DISTANCE in nautical one or more numerals SPEED in four numerals LOCAL TIME
the first two denote hours and the rest min
one or more numerals SPEED in kilometers per hour
Zwith four numerals GMT the first two denote hours and the rest one To call or address shore visual stations Numeral to be
approved by local port or A with three I wish to communicate with you by Table 1 Chapter 2 Section 10 Page 104
K with one C with three D with two four or six in nautical miles R with one or more the first two
denote hours and the rest minutes Z with four the first two denote degrees and the rest
minutes L with four the last two numerals denote minutes and
the rest degrees G with four or five TIME the first two denote hours and the rest
minutes T with four in kilometers per V with one or more in knots S with one or more
23
CHAPTER 1SIGNALING SINGLE LETTER SIGNALS BETWEEN ICEBREAKER AND ASSISTED VESSELS
The following single letter signals when made between an icebreaker and assisted vessels have only the given
in this table and are only to be made by sound visual or signals
WM Icebreaker support is now commencing Use special icebreaker support signals and keep continuous watch for
sound visual or signals
WO Icebreaker support is finished Proceed to your Code Letters or
Icebreaker Assisted Vessels
Numerals
A Go ahead proceed along the ice channel I am going ahead I am proceeding along
the ice channel
G I am going ahead follow me I am going ahead I am following you
J Do not follow me proceed along the ice channel I will not follow you I will proceed along
the ice channel
P Slow down I am slowing down
N Stop your engines I am stopping my engines
H Reverse your engines I am reversing my engines
L You should stop your vessel instantly I am stopping my vessel
4 Stop I am icebound Stop I am icebound
Q Shorten the distance between vessels I am shortening the distance
B Increase the distance between vessels I am increasing the distance
5 Attention Attention
Y Be ready to take or cast off the towline I am ready to take or cast off the SECTION 10MORSE
1 The signal K by sound or light may be used by an icebreaker to remind ships of their obligation to
listen continuously on their radio
2 If more than one vessel is assisted the distances between vessels should be as constant as possible Watch
speed of your own vessel and vessel ahead should speed of your own vessel go down give attention signal to
the following vessel
3 The use of these does not relieve any vessel from complying with the International Regulations for Preventing
Collisions at Sea
4 Stop your headway given only to a ship in an I am stopping headway
icechannel ahead of and approaching or going
away from icebreaker
Note This signal should not be made by Singleletter signals which may be used during icebreaking operations
E I am altering my course to starboard
I I am altering my course to port
S I am operating astern propulsion
M My vessel is stopped and making no way through the water
Notes 1 Signals of letters marked by an asterisk when made by sound may only be made in compliance with the
requirements of the International Regulations for Preventing Collisions at Sea
2 Additional signals for icebreaking support can be found in Chapter 2 Section 6 Page 93 and 94
CHAPTER 2
CHAPTER 2
GENERAL SIGNAL CODE
PAGE
SECTION 1 29
ABANDON 29
ASSISTANCE 33
BOATSRAFTS 36
DISTRESS 39
POSITION 41
SEARCH AND RESCUE 43
SURVIVORS 47
SECTION 2 49
COLLISION 49
OPERATIONS 51
LEAK 56
TOWINGTUGS 56
SECTION 3 AIDS TO 62
AIDS TO NAVIGATION 62
BAR 62
BEARINGS 62
COURSE 64
DANGERS TO 65
DEPTHDRAFT 68
ELECTRONIC NAVIGATION 70
NAVIGATION 72
NAVIGATING AND STEERING INSTRUCTIONS 73
TIDE 74
SECTION 4 MANEUVERS 76
AHEADASTERN 76
ALONGSIDE 77
TO 77
MANEUVERS 80
SPEED 82
STOPHEAVE TO 83
SECTION 5 MISCELLANEOUS 84
CREWPERSONS ON BOARD 84
FISHERY 85
PILOT 87
PORTHARBOR 87
MISCELLANEOUS 88
SECTION 6 91
CLOUDS 91
STORM 91
ICEICEBERGS 91
ICEBREAKER 93
ATMOSPHERIC 94
SEASWELL 95
FORECAST 97
WIND 97
SECTION 7 ROUTING OF SHIPS 99
SECTION 8 100
CALLING 100
CANCEL 100
COMMUNICATE 100
EXERCISE 102
REPEAT 102
SECTION 9 INTERNATIONAL HEALTH REGULATIONS 103
PRATIQUE MESSAGES 103
SECTION 10 TABLES OF COMPLEMENTS 104
CHAPTER 2
SECTION 1
Cross
Code Meaning
Reference
ABANDON
AA Repeat all after
AB Repeat all before
AC I am abandoning my vessel
AD I am abandoning my vessel which has suffered a nuclear accident and is a possible source of
radiation danger
AE I must abandon my vessel
AE 1 I or crew of vessel indicated wish to abandon my or their vessel but have not the
means
AE 2 I shall abandon my vessel unless you will remain by me ready to assist
AF I do not intend to abandon my vessel
AF 1 Do you intend to abandon your vessel
AG You should abandon your vessel as quickly as possible
AH You should not abandon your vessel
AI Vessel indicated by position andor name or identity signal if necessary will have to be aban
doned
Procedural signals for repetition
Accident
AJ I have had a serious nuclear accident and you should approach with caution
AK I have had a nuclear accident on board
I am abandoning my vessel which has suffered a nuclear accident and is a possible source of
radiation danger AD
I am proceeding to the position of accident SB
I am proceeding to the position of accident at full speed Expect to arrive at time indicated FE
Are you proceeding to the position of accident If so when do you expect to arrive FE 1
You should steer course or follow me to reach position of accident FL
I am circling over the area of accident BJ
An aircraft is circling over the area of accident BJ 1
Position of accident or survival craft is marked FJ
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Accident
Position of accident or survival craft is marked by flame or smoke float FJ 1
Position of accident or survival craft is marked by sea marker FJ 2
Position of accident or survival craft is marked by sea marker dye FJ 3
Position of accident or survival craft is marked by radiobeacon FJ 4
Position of accident or survival craft is marked by wreckage FJ 5
Is position of accident or survival craft marked FK
I have searched area of accident but have found no trace of derelict or survivors GC 2
Man overboard Please take action to pick him up position to be indicated if necessary GW
Doctor
AL I have a doctor on board
AM Have you a doctor
AN I need a doctor
AN 1 I need a doctor I have severe burns
AN 2 I need a doctor I have radiation casualties
I require a helicopter urgently with a doctor BR 2
Helicopter is coming to you now or at time indicated with a doctor BT 2
AO Number of injured andor dead not yet known
AO 1 How many injured
AO 2 How many dead
AP I have number casualties
AQ I have injuredsick person or number of persons indicated to be taken off urgently I cannot
alight but I can lift injuredsick person AZ 1
You cannot alight on the deck can you lift injuredsick person BA 2
I require a helicopter urgently to pick up injuredsick person BR 3
You should send a with a stretcher BS
A is coming to take injuredsick BU
AT You should send injuredsick persons to me
SECTION Cross
Code Meaning Reference
I am forced to alight near you or in position I am alighting in position indicated if necessary to pick up crew of Aircraft
should endeavor to alight where flag is waved or light is shown
AX You should train your searchlight nearly vertical on a cloud if possible and if
my aircraft is seen deflect the beam upwind and on the water to facilitate my landing
AX 1 Shall I train my searchlight nearly vertical on a cloud if possible and if
your aircraft is seen deflect the beam upwind and on the water to facilitate your landing
AY I will alight on your deck you should steer course speed knots
AZ I cannot alight but I can lift crew
AZ 1 I cannot alight but I can lift injuredsick person
BA You cannot alight on the deck
BA 1 You cannot alight on the deck can you lift crew
BA 2 You cannot alight on the deck can you lift injuredsick person
BB You may alight on my deck
BB 1 You may alight on my deck I am ready to receive you forward
BB 2 You may alight on my deck I am ready to receive you amidship
BB 3 You may alight on my deck I am ready to receive you aft
BB 4 You may alight on my deck but I am not yet ready to receive you
I have established with the aircraft in distress on 2182 kHz
BC 1 Can you communicate with the aircraft
BD I have established with the aircraft in distress on kHz
BE I have established with the aircraft in distress on MHz
Aircraft is ditched in position indicated and requires immediate assistance
I sighted disabled aircraft in lat long at time indicated DS
BG Aircraft is still afloat
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Flying
BH I sighted an aircraft at time indicated in lat long flying on course
BH 1 Aircraft was flying at high altitude
BH 2 Aircraft was flying at low altitude
BI I am flying to likely position of vessel in distress
BI 1 I am flying at low altitude near the vessel
BJ I am circling over the area of accident
BJ 1 An aircraft is circling over the area of accident
BK You are overhead
BK 1 Am I overhead
BL I am having engine trouble but am continuing flight
Parachute
BM You should parachute object to windward Mark it by smoke or light signal
BM 1 I am going to parachute object to windward marking it by smoke or light signal
BM 2 I am going to parachute equipment
BM 3 Inflatable raft will be dropped to windward by parachute
BN Repeat all between and
BO We are going to jump by parachute
Procedural signal for repetition
BP Aircraft is coming to participate in search Expected to arrive over the area of accident at time
indicated
The search area of the aircraft is between lat and and long and FU
Search by will be discontinued because of unfavorable conditions FV
SAR aircraft is coming to your assistance CP 1
Speed
BQ The speed of my aircraft in relation to the surface of the earth is knots or kilometers per
SECTION
Cross
Code Meaning Reference
Speed
BQ 1 What is the speed of your aircraft in relation to the surface of the earth
I require a helicopter urgently
BR 1 I require a helicopter urgently to pick up persons
BR 2 I require a helicopter urgently with a doctor
BR 3 I require a helicopter urgently to pick up injuredsick person
BR 4 I require a helicopter urgently with inflatable raft
BS You should send a with Helicopter is coming to you now or at time indicated
BT 1 Helicopter is coming to you now or at time indicated to pick up persons
BT 2 Helicopter is coming to you now or at time indicated with a doctor
BT 3 Helicopter is coming to you now or at time indicated to pick up injuredsick person
BT 4 Helicopter is coming to you now or at time indicated with inflatable raft
BU A is coming to take I cannot send a The magnetic course for you to steer towards me or vessel or position
indicated is at time
The magnetic course for the helicopter to regain its base is
BY Will you indicate the magnetic course for me to steer towards you or vessel or position indi
cated
BZ Your magnetic bearing from me or from vessel or position indicated is at time What is my magnetic bearing from you or from
vessel or position ASSISTANCE
Required
I am in distress and require immediate assistance NC
CB I require immediate assistance
CB 1 I require immediate assistance I have a dangerous list
CB 2 I require immediate assistance I have damaged steering gear
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Required
CB 3 I require immediate assistance I have a serious disturbance on board
CB 4 I require immediate assistance I am aground
CB 5 I require immediate assistance I am drifting
CB 6 I require immediate assistance I am on fire
CB 7 I require immediate assistance I have sprung a leak
CB 8 I require immediate assistance propeller shaft is broken
CC I am or vessel indicated is in distress in lat long or bearing from place indicated dis
tance and require immediate assistance Complements Table 2 Chapter 2 Section 10 Page
104 if required
I require assistance V
CD I require assistance in the nature of Complements Table 2 Chapter 2 Section 10 Page
I require medical assistance W
I request assistance from fishery protection or fishery assistance vessel TY
CE I will attempt to obtain for you the assistance required
Aircraft is ditched in position indicated and requires immediate assistance BF
CF Signals from requesting assistance are coming from me lat
long if necessary
CG Stand by to assist me or vessel indicated
CG 1 I will stand by to assist you or vessel indicated
Survivors are in bad condition Medical assistance is urgently required HM
CH Vessel indicated is reported as requiring assistance in lat long or bearing from place
indicated CH 1 Lightvessel or lighthouse indicated requires assistance
CH 2 Space ship is down in lat long and requires immediate assistance
CI Vessel aground in lat long requires assistance
CJ Do you require assistance
CJ 1 Do you require immediate assistance
CJ 2 Do you require any further assistance
CJ 3 What assistance do you require
CJ 4 Can you proceed without SECTION
Cross
Code Meaning Reference
Not Assistance is not or is no longer required by me or vessel I offered assistance but it was declined
GivenNot Given
CM One or more vessels are assisting the vessel in distress
CM 1 reported in distress is receiving You should give all possible assistance
CN 1 You should give immediate assistance to pick up survivors
CN 2 You should send survival craft to assist vessel Assistance cannot be given to you or indicated
CO 1 I cannot give the assistance required
Proceeding to I am or vessel indicated is proceeding to your assistance
CP 1 SAR aircraft is coming to your Call for unknown stations or general call to all stations
CR I am proceeding to the assistance of vessel lat long
CS What is the name or identity signal of your vessel or station
CT I or vessel indicated expect to reach you at time Assistance will come at time indicated
CU 1 I can assist you
CV I am unable to give assistance
CV 1 Will you go to the assistance of vessel indicated in lat long
CV 2 May I assist you
CV 3 Can you assist me or vessel indicated
CV 4 Can you assist
Can you offer assistance Complements Table 2 Chapter 2 Section 10 Page 104 TZ
I shall abandon my vessel unless you will remain by me ready to assist AE 2
I cannot get the fire under control without assistance IX 1
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Proceeding to Assistance
I can get the fire under control without assistance IY
Can you get the fire under control without assistance IY 1
I have placed the collision mat I can proceed without assistance KA 1
I cannot take you or vessel indicated in tow but I will report you and ask for immediate
assistance KN 1
I cannot steer without assistance PK
Procedural signals
CW Boatraft is on board
CW 1 Boatraft is safe
CW 2 Boatraft is in sight
CW 3 Boatraft is adrift
CW 4 Boatraft is aground
CW 5 Boatraft is alongside
CW 6 Boatraft is damaged
CW 7 Boatraft has sunk
CW 8 Boatraft has capsized
CX Boats cannot be used
CX 1 Boats cannot be used because of prevailing weather conditions
CX 2 Boats cannot be used on the starboard side because of list
CX 3 Boats cannot be used on the port side because of list
CX 4 Boats cannot be used to disembark people
CX 5 Boats cannot be used to get alongside
CX 6 Boats cannot be used to reach you
CX 7 I cannot send a boat
CY Boats isare coming to you
CY 1 Boatraft is making for the shore
CY 2 Boatraft has reached the SECTION
Cross
Code Meaning
You should make a lee for the CZ 1 You should discharge oil to smooth sea
DA should approach vessel as near as possible to take off persons
A is coming to take injuredsick BU
DB Veer a boat or raft on a line
DC Boat should endeavor to land where flag is waved or light is shown
DD Boats are not allowed to come alongside
DD 1 Boats are not allowed to land after time From
Procedural signal used to precede the name or identity signal of the calling station
Available
DF I have number serviceable boats
DG I have a motor boat or number motor boats
DH I have no boatraft
DH 1 I have no motor boat
DH 2 Have you any boats with installation or portable radio equipment
DH 3 How many serviceable motor boats have you
DH 4 How many serviceable boats have you
Required
DI I require boats for number persons
DJ Do you require a boat
Send
DK You should send all available DK 1 You should send back my boat
DK 2 Can you send a boat
You should send a with stretcher BS
You should send survival craft to assist vessel indicated CN 2
You should stop or heave to I am going to send a boat SQ 2
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Send
DL I can send a boat
DL 1 I am sending a boat
I cannot send a boat CX 7
Search
DM You should search for the DN I have found the boatraft
DN 1 Have you seen or heard anything of the boatraft
DO Look out for boatraft in bearing distance from me or from position indicated
DP There is a boatraft in bearing distance from me or from position indicated
DQ An empty boatraft has been sighted in lat long or bearing from place indicated dis
tance
Disabled
DR Have you sighted disabled in approximate lat long
DS I sighted disabled aircraft in lat long at time indicated
DT I sighted disabled vessel in lat long at time indicated
DT 1 I sighted disabled vessel in lat long at time indicated apparently without a radio
I am disabled communicate with me F
Drifting
DU I am drifting at number knots towards degrees
DV I am drifting
DV 1 I am adrift
DW Vessel name or identity signal is drifting near lat long
I require immediate assistance I am drifting CB 5
I am or vessel indicated is breaking adrift RC
I have broken adrift RC 1
SECTION
Cross
Code Meaning
Reference
Sinking
DX I am sinking lat long if Vessel name or identity signal has sunk in lat long
DY 1 Did you see vessel sink
DY 2 Where did vessel sink
DY 3 Is it confirmed that vessel name or identity signal has sunk
DY 4 What is the depth of water where vessel sunk
DISTRESS
in Distress
I am in distress and require immediate assistance NC
DZ Vessel or aircraft indicated appears to be in distress
DZ 1 Is vessel or aircraft indicated in distress
DZ 2 What is the name or identity signal of vessel in distress
EA Have you sighted or heard of a vessel in distress Approximate position lat long or bear
ing from place indicated EA 1 Have you any news of reported missing or in distress in this area
I am or vessel indicated is in distress in lat long or bearing from place indicated dis
tance and require immediate assistance Complements Table 2 Chapter 2 Section 10 Page
104 if required CC
EB There is a vessel or aircraft in distress in lat long or bearing distance from me or
Complements Table 3 Chapter 2 Section 10 Page 104
EC A vessel which has suffered a nuclear accident is in distress in lat long
Distress Signal
ED Your distress signals are understood
ED 1 Your distress signals are understood the nearest lifesaving station is being informed
EF SOSMAYDAY has been cancelled
EF 1 Has the SOSMAYDAY been cancelled
I have intercepted SOSMAYDAY from vessel name or identity signal or aircraft in posi
tion lat long at time indicated FF
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Distress Signal
EG Did you hear SOSMAYDAY given at time indicated
EG 1 Will you listen on 2182 kHz for signals of emergency EG 2 I am listening on 2182 kHz for signals of emergency
EG 3 Have you received the signal of an emergency radiobeacon on 2182
EG 4 I have received the signal of an emergency radiobeacon on 2182 kHz
EG 5 Will you listen on MHz for signals of emergency EG 6 I am listening on MHz for signals of emergency
EG 7 Have you received the signal of an emergency radiobeacon on
EG 8 I have received the signal of an emergency radiobeacon on MHz
EJ I have received distress signal transmitted by coast station indicated
EJ 1 Have you received distress signal transmitted by coast station indicated
EK I have sighted distress signal in lat long
EK 1 An explosion was seen or heard position or direction and time to be indicated
EK 2 Have you heard or seen distress signal from survival craft
Reference is made to signals prescribed by the International Convention for the Safety of Life at Sea 1974 Regu
lation 16a Chapter V as replies from lifesaving stations or maritime rescue units to distress signals made by a
ship or person
Position of Distress
EL Repeat the distress position
EL 1 What is the position of vessel in distress
Position given with SOSMAYDAY from vessel or aircraft was lat long or
bearing from place indicated distance FG
What was the position given with SOSMAYDAY from vessel or aircraft FG 1
Position given with SOSMAYDAY is wrong The correct position is lat long FH
Position given with SOSMAYDAY by vessel is wrong I have her bearing by radio direction
finder and can exchange bearings with any other vessel FI
Survival craft are believed to be in the vicinity of lat long GI
EM Are there other in the vicinity of in SECTION
Cross
Code Meaning Reference
Contact or Locate
EN You should try to contact in distress
EO I am unable to locate in distress because of poor I have lost sight of you
I have located or found wreckage from the in distress position to be indicated
if necessary by lat long or by bearing from specified place and distance GL
EQ I expect to be at the position of in distress at time indicated
EQ 1 Indicate estimated time of your arrival at position of in distress
I am flying to likely position of vessel in distress BI
One or more vessels are assisting the vessel in distress CM
reported in distress is receiving assistance CM 1
I am proceeding to the assistance of in distress in lat long CR
I have found in distress in lat long GF
POSITION
ER You should indicate your position at time My position at time indicated was lat long
EU My present position is lat long or bearing from place indicated EU 1 What is your present position
EV My present position course and speed are lat long knots
EV 1 What are your present position course and speed
EW My position is ascertained by dead reckoning
EW 1 My position is ascertained by visual bearings
EW 2 My position is ascertained by astronomical EW 3 My position is ascertained by EW 4 My position is ascertained
by radar
EW 5 My position is ascertained by electronic system
EX My position is doubtful
EY I am confident as to my position
EY 1 Are you confident as to your position
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
EZ Your position according to bearings taken by radio direction finder stations which I control is
lat long at time indicated
EZ 1 Will you give me my position according to bearings taken by radio direction finder sta
tions which you control
FA Will you give me my position
FB Will vessels in my immediate vicinity or in the vicinity of lat long please indicate posi
tion course and speed
Position of Distress
FC You should indicate your position by visual or sound signals
FC 1 You should indicate your position by rockets or flares
FC 2 You should indicate your position by visual signals
FC 3 You should indicate your position by sound signals
FC 4 You should indicate your position by FC 5 You should indicate your position by smoke signal
FD My position is indicated by visual or sound signals
FD 1 My position is indicated by rockets or flares
FD 2 My position is indicated by visual signals
FD 3 My position is indicated by sound signals
FD 4 My position is indicated by FD 5 My position is indicated by smoke signal
I expect to be at the position of in distress at time indicated EQ
Indicate estimated time of your arrival at position of in distress EQ 1
Position given with SOSMAYDAY from vessel or aircraft was lat long or bearing
from place indicated distance FG
What was position given with SOSMAYDAY from vessel or aircraft FG 1
Position given with SOSMAYDAY is wrong The correct position is lat long FH
Position given with SOSMAYDAY by vessel is wrong I have her bearing by radio direction
finder and can exchange bearings with any other vessel FI
Position of accident or survival craft is marked FJ
Position of accident or survival craft is marked by flame or smoke float FJ 1
Position of accident or survival craft is marked by sea marker FJ 2
Position of accident or survival craft is marked by sea marker dye FJ 3
SECTION
Cross
Code Meaning
Reference
Position of Distress
Position of accident or survival craft is marked by radiobeacon FJ 4
Position of accident or survival craft is marked by wreckage FJ 5
Is position of accident or survival craft marked FK
You should transmit your and series of long dashes or your carrier frequency to
home vessel or aircraft to your position FQ
Shall I home vessel or aircraft to my position FQ 1
You should indicate position of survivors by throwing pyrotechnic signals HT
SEARCH AND RESCUE
Proceeding to Assistance
I am proceeding to the assistance of in distress lat long CR
FE I am proceeding to the position of accident at full speed Expect to arrive at time indicated
FE 1 Are you proceeding to the position of accident If so when do you expect to arrive
I am unable to give assistance CV
Can you assist CV 4
Position of Distress or Accident
FF I have intercepted SOSMAYDAY from vessel name or identity signal or aircraft in posi
tion lat long at time indicated
FF 1 I have intercepted SOSMAYDAY from vessel name or identity signal or aircraft in
position lat long at time indicated I have heard nothing since
FG Position given with SOSMAYDAY from vessel or aircraft was lat long or bearing
from place indicated FG 1 What was position given with SOSMAYDAY from vessel or Position given with SOSMAYDAY is wrong The
correct position is lat long
FI Position given with SOSMAYDAY by vessel is wrong I have her bearing by radio direction
finder and can exchange bearings with any other vessel
FJ Position of accident or survival craft is marked
FJ 1 Position of accident or survival craft is marked by flame or smoke float
FJ 2 Position of accident or survival craft is marked by sea marker
FJ 3 Position of accident or survival craft is marked by sea marker dye
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Position of Distress or Accident
FJ 4 Position of accident or survival craft is marked by FJ 5 Position of accident or survival craft is marked by
wreckage
FK Is position of accident or survival craft marked
FL You should steer course or follow me to reach position of accident
Course to reach me is MF
What is the course to reach you MF1
FM Visual contact with vessel is not continuous
FN I have lost all contact with vessel
I have lost sight of you EP
FO I will keep close to you
FO 1 I will keep close to you during the night
FP Estimated set and drift of survival craft is degrees and knots
FP 1 What is the estimated set and drift of survival craft
FQ You should transmit your and series of long dashes or your carrier frequency to
home vessel or aircraft to your position
FQ 1 Shall I home vessel or aircraft to my position
Search
FR I am or vessel indicated is in charge of coordinating search
FR 1 Carry out search pattern starting at hours Initial course search speed knots
FR 2 Carry out radar search ships proceeding in loose line abreast at intervals between
Initial course search speed knots
FR 3 Vessel indicated call sign or identity signal is allocated track number
FR 4 Vessels indicated adjust interval between ships to miles
FR 5 Adjust track spacing to miles
FR 6 Search speed will now be knots
FR 7 Alter course as necessary to next leg of track now or at time indicated
FS Please take charge of search in sector stretching between bearings and from vessel in dis
SECTION
Cross
Code Meaning
Reference
Search
FT Please take charge of search in sector between lat and and long and
FU The search area of the aircraft is between lat and and long and
FV Search by will be discontinued because of unfavorable You should search in the vicinity of lat long
FX Shall I search in the vicinity of lat long
FY I am in the search area
FY 1 Are you in the search area
Aircraft is coming to participate in search Expected arrive over the area of accident at time
indicated BP
FZ You should continue search according to instructions and until further notice
FZ 1 I am continuing to search
FZ 2 Are you continuing to search
FZ 3 Do you want me to continue to search
GA I cannot continue to search
GB You should stop search and return to base or continue your voyage
These signals are intended for use in connection with the Merchant Ship Search and Rescue Manual MERSAR
Results of Search
GC Report results of search
GC 1 Results of search negative I am continuing to search
GC 2 I have searched area of accident but have found no trace of derelict or survivors
GC 3 I have noted patches of oil at likely position of accident
GD missing or being looked for has not been heard of since
GD 1 Have you anything to report on missing or being looked for
GD 2 Have you seen wreckage or has been located at lat long
GF I have found in distress in lat long
GG was last reported at time indicated in lat long steering course
GH I have sighted survival craft in lat long or bearing distance from me
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Results of Search
GI Survival craft are believed to be in the vicinity of lat long
GJ Wreckage is reported in lat long
GJ 1 Wreckage is reported in lat long No survivors appear to be in the vicinity
GK Aircraft wreckage is found in lat long
GL I have located or found wreckage from the in distress position to be indicated
if necessary by lat and long or by bearing from specified place and Rescue
GM I cannot save my vessel
GM 1 I cannot save my vessel keep as close as possible
GN You should take off persons
GN 1 I wish some persons taken off Skeleton crew will remain on board
GN 2 I will take off persons
GN 3 Can you take off persons
GO I cannot take off persons
GP You should proceed to the rescue of vessel or ditched aircraft in lat long
GQ I cannot proceed to the rescue owing to weather You should do all you can
GR Vessel coming to your rescue or to the rescue of vessel or aircraft indicated is steering
course speed knots
GR 1 You should indicate course and speed of vessel coming to my rescue or to the rescue of
vessel or aircraft indicated
GS I will attempt rescue with whip and breeches buoy
GT I will endeavor to connect with line throwing apparatus
GT 1 Look out for rocket line
GU It is not safe to fire a rocket
GV You should endeavor to send me a line
GV 1 Have you a line throwing apparatus
GV 2 Can you connect with line throwing apparatus
GV 3 I have not a line throwing apparatus
GW Man overboard Please take action to pick him up position to be indicated if necessary
Man overboard O
SECTION Cross
Code Meaning Reference
Reference is made to signals prescribed by the International Convention for the Safety of Life at Sea 1974 Regu
lation 16c Chapter V in connection with the use of shore lifesaving apparatus
Results of Rescue
GX Report results of rescue
GX 1 What have you or rescue picked up
GY I or rescue have picked up wreckage
GZ All persons saved
GZ 1 All persons lost
HA I or rescue have rescued number injured persons
HB I or rescue have rescued number I or rescue have picked up number bodies
HD Can I transfer rescued persons to you
SURVIVORS
HF I have located survivors in water place indicated I have located survivors in survival craft lat long or bearing
from place indicated dis
I have located survivors on drifting ice lat long
HK I have located bodies in lat long or bearing from place indicated Survivors not yet located
HL 1 I am still looking for survivors
HL 2 Have you located survivors If so in what position
HM Survivors are in bad condition Medical assistance is urgently required
HM 1 Survivors are in bad condition
HM 2 Survivors are in good condition
HM 3 Condition of survivors not HM 4 What is condition of You should proceed to lat long to pick up
Pick up survivors from drifting ice lat long
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning Reference
HO 1 Pick up survivors from sinking HP Survivors have not yet been picked up
HP 1 Have survivors been picked up
You should give immediate assistance to pick up survivors CN 1
HQ Transfer survivors to my vessel or vessel indicated
HQ 1 Have you any survivors on board
HR You should try to obtain from survivors all possible HT You should indicate position of survivors by throwing pyrotechnic
CHAPTER 2
SECTION 2
Cross
Code Meaning
Reference
COLLISION
HV Have you been in I have or vessel indicated has collided with surface craft
HW 1 I have or vessel indicated has collided with light vessel
HW 2 I have or vessel indicated has collided with submarine
HW 3 I have or vessel indicated has collided with unknown vessel
HW 4 I have or vessel indicated has collided with underwater object
HW 5 I have or vessel indicated has collided with navigation buoy
HW 6 I have or vessel indicated has collided with iceberg
HW 7 I have or vessel indicated has collided with floating ice
HX Have you received any damage in collision
HX 1 I have received serious damage above the waterline
HX 2 I have received serious damage below the waterline
HX 3 I have received minor damage above the waterline
HX 4 I have received minor damage below the The vessel name or identity signal with which I have been in collision has sunk
HY 1 The vessel name or identity signal with which I have been in collision has resumed her
voyage
HY 2 I do not know what has happened to the vessel with which I collided
HY 3 Has the vessel with which you have been in collision resumed her voyage
HY 4 What is the name or identity signal of the vessel with which you collided
HY 5 What is the name or identity signal of vessel which collided with me My name or
identity signal is
HY 6 Where is the vessel with which you collided
HZ There has been a collision between vessels indicated names or identity signals
I urgently require a collision mat KA
I have placed the collision mat I can proceed without assistance KA 1
Can you place the collision mat KA 2
I have received damage to stem
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
IA 1 I have received damage to stern frame
IA 2 I have received damage to side plate above water
IA 3 I have received damage to side plate below water
IA 4 I have received damage to bottom plate
IA 5 I have received damage to boilerroom
IA 6 I have received damage to engineroom
IA 7 I have received damage to hatchways
IA 8 I have received damage to steering gear
IA 9 I have received damage to propellers
IB What damage have you received
IB 1 My vessel is seriously damaged
IB 2 I have minor damage
IB 3 I have not received any damage
IB 4 The extent of the damage is still unknown
Have you received any damage in collision HX
I have received serious damage above the waterline HX 1
I have received serious damage below the waterline HX 2
I have received minor damage above the waterline HX 3
I have received minor damage below the waterline HX 4
IC Can damage be repaired at sea
IC 1 Can damage be repaired at sea without assistance
IC 2 How long will it take you to repair damage
ID Damage can be repaired at sea
ID 1 Damage can be repaired at sea without assistance
ID 2 Damage has been repaired
IF Damage cannot be repaired at sea
IF 1 Damage cannot be repaired at sea without assistance
IG Damage can be repaired in number hours
IJ I will try to proceed by my own means but I request you to keep in contact with me by
Complements Table 1 Chapter 2 Section 10 Page 104
IK I can proceed at number SECTION
Cross
Code Meaning
I can only proceed at slow speed
IL 1 I can only proceed with one engine
IL 2 I am unable to proceed under my own power
IL 3 Are you in a condition to proceed
IM I request to be escorted until further notice
Propeller shaft is broken RO
My propeller is fouled by hawser or rope RO 1
I have lost my propeller RO 2
I require a diver
IN 1 I require a diver to clear propeller
IN 2 I require a diver to examine bottom
IN 3 I require a diver to place collision mat
IN 4 I require a diver to clear my anchor
IO I have no diver
IP A diver will be sent as soon as possible or at time Diver has been attacked by divers disease and requires
decompression chamber I am engaged in submarine survey work underwater operations Keep clear of me and go
slow
I have a diver down keep well clear at slow speed A
The use of this signal does not relieve any vessel from compliance with the International Regulations for Prevent
ing Collisions at Sea 1972
Fire
IT I am on fire
IT 1 I am on fire and have dangerous cargo on board keep well clear of me J
IT 2 Vessel name or identity signal is on fire
IT 3 Are you on fire
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
Fire
IU Vessel name or identity signal on fire is located at lat long
I require immediate assistance I am on fire CB 6
IV Where is the fire
IV 1 I am on fire in the engineroom
IV 2 I am on fire in the boilerroom
IV 3 I am on fire in hold or cargo
IV 4 I am on fire in passengers or crews quarters
IV 5 Oil is on fire
IW Fire is under control
IX Fire is gaining
IX 1 I cannot get the fire under control without assistance
IX 2 Fire has not been IY I can get the fire under control without assistance
IY 1 Can you get the fire under control without assistance
IZ Fire has been IZ 1 I am flooding compartment to extinguish fire
IZ 2 Is fire JA I require firefighting appliances
JA 1 I require foam fire JA 2 I require CO2 fire JA 3 I require tetrachloride fire JA 4 I require
material for foam fire JA 5 I require material for CO2 fire JA 6 I require material for carbon tetrachloride fire
JA 7 I require water pumps
Explosion
JB There is danger of explosion
JC There is no danger of SECTION
Cross
Code Meaning Reference
Explosion
JC 1 Is there any danger of Explosion has occurred in boiler
JD 1 Explosion has occurred in tank
JD 2 Explosion has occurred in cargo
JD 3 Further explosions are possible
JD 4 There is danger of toxic effects
JE Have you any casualties owing to explosion
An explosion was seen or heard position or direction and time to be indicated EK 1
Grounding
JF I am or vessel indicated is aground in lat long also the following complements if nec
essary
0 On rocky bottom
1 On soft bottom
2 Forward
3 Amidship
4 Aft
5 At high water forward
6 At high water amidship
7 At high water aft
8 Full length of vessel
9 Full length of vessel at high water
JG I am aground I am in dangerous I am aground I am not in danger
I require immediate assistance I am aground CB 4
Vessel aground in lat long require assistance CI
JI Are you aground
JI 1 What was your draft when you went aground
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
Grounding
JI 2 On what kind of ground have you gone aground
JI 3 At what state of tide did you go aground
JI 4 What part of your vessel is aground
JJ My maximum draft when I went aground was number feet or meters
JK The tide was high water when the vessel went aground
JK 1 The tide was half water when the vessel went aground
JK 2 The tide was low water when the vessel went aground
JL You are running the risk of going aground
JL 1 You are running the risk of going aground do not approach me from the starboard side
JL 2 You are running the risk of going aground do not approach me from the port side
JL 3 You are running the risk of going aground do not approach me from forward
JL 4 You are running the risk of going aground do not approach me from aft
JM You are running the risk of going aground at low water
Beaching
JN You should beach the vessel in lat long
JN 1 You should beach the vessel where flag is waved or light is shown
JN 2 I must beach the vessel
Refloating
JO I am afloat
JO 1 I am afloat forward
JO 2 I am afloat aft
JO 3 I may be got afloat if prompt assistance is given
JO 4 Are you or vessel indicated still afloat
JO 5 When do you expect to be afloat
JP I am jettisoning to refloat the following complements should be used if required
1 Cargo
2 Bunkers
3 Everything movable SECTION
Cross
Code Meaning Reference
Refloating
4 Everything movable aft
JQ I cannot refloat without jettisoning the following complements should be used if required
1 Cargo
2 Bunkers
3 Everything movable forward
4 Everything movable aft
JR I expect or vessel indicated expects to refloat
JR 1 I expect or vessel indicated expects to refloat at time indicated
JR 2 I expect or vessel indicated expects to refloat in daylight
JR 3 I expect or vessel indicated expects to refloat when tide rises
JR 4 I expect or vessel indicated expects to refloat when visibility improves
JR 5 I expect or vessel indicated expects to refloat when weather moderates
JR 6 I expect or vessel indicated expects to refloat when draft is lightened
JR 7 I expect or vessel indicated expects to refloat when tugs arrive
JS Is it likely that you or vessel indicated will refloat
JS 1 Is it likely that you or vessel indicated will refloat at time indicated
JS 2 Is it likely that you or vessel indicated will refloat in daylight
JS 3 Is it likely that you or vessel indicated will refloat when tide rises
JS 4 Is it likely that you or vessel indicated will refloat when visibility improves
JS 5 Is it likely that you or vessel indicated will refloat when weather moderates
JS 6 Is it likely that you or vessel indicated will refloat when draft is lightened
JS 7 Is it likely that you or vessel indicated will refloat when tugs arrive
JT I can refloat if an anchor is laid out for me
JT 1 I may refloat without assistance
JT 2 Will you assist me to refloat
JU I cannot be refloated by any means now Will you escort me to lat long after
55
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
LEAK
JW I have sprung a leak
JW 1 Leak is dangerous
JW 2 Leak is causing dangerous heel
JW 3 Leak is beyond the capacity of my pumps
I require immediate assistance I have sprung a leak CB 7
JX Leak is gaining rapidly
JX 1 I cannot stop the leak
JY Leak can be controlled if it does not get any worse
JY 1 I require additional pumping facilities to control the leak
JY 2 Leak is under control
JY 3 Leak has been stopped
JZ Have you sprung a leak
JZ 1 Can you stop the leak
JZ 2 Is the leak dangerous
KA I urgently require a collision mat
KA 1 I have placed the collision mat I can proceed without assistance
KA 2 Can you place the collision mat
KB I have number feet or meters of water in the hold
KC My holds is are flooded
KC 1 How many compartments are flooded
KD There are number compartments flooded
KE The watertight bulkheads are standing up well to the pressure of the water
KE 1 I need timber to support bulkheads
KF I require a tug or number tugs
I require a tug Z
SECTION Cross
Code Meaning Reference
KG Do you require a tugs
KG 1 I do not require tugs
KH Tugs is are coming to you Expect to arrive at time indicated
KH 1 Tug with pilot is coming to you
KH 2 You should wait for tugs
KI There are no tugs available
KI 1 Tugs cannot proceed out
in Tow
KJ I am towing a submerged object
KJ 1 I am towing a float
KJ 2 I am towing a target
KK Towing is impossible under present weather conditions
KK 1 Towing is very difficult
KK 2 I cannot connect at present but will attempt when conditions improve
KK 3 I cannot connect tonight I will try in daylight
KK 4 Can you assist with your engines
KL I am obliged to stop towing KL 1 You should stop towing I can take you or vessel indicated in tow
KM 1 Shall I take you in tow
KN I cannot take you or vessel indicated in tow
KN 1 I cannot take you or vessel indicated in tow but I will report you and ask for immediate
assistance
KN 2 I cannot take you or vessel indicated in tow but can take off persons
KO You should endeavor to take vessel name or identity signal in tow
KO 1 You should report whether you have taken vessel name or identity signal in tow
KO 2 Can you take me or vessel indicated in tow
KP You should tow me to the nearest port or anchorage or place indicated
KP 1 I will tow you to the nearest port or anchorage or place
57
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
in Tow
KP 2 I must get shelter or anchorage as soon as possible
KQ Prepare to be taken in tow
KQ 1 I am ready to be taken in tow
KQ 2 Prepare to tow me or vessel indicated
KQ 3 I am ready to tow you
KQ 4 Prepare to resume towing
KQ 5 I am ready to resume towing
KR All is ready for towing
KR 1 I am commencing to tow
KR 2 You should commence towing
KR 3 Is all ready for towing
Towing KS You should send a line over
KS 1 I have taken the line
KT You should send me a towing hawser
KT 1 I am sending towing hawser
KU I cannot send towing hawser
KU 1 I have no or no other hawser
KU 2 I have no wire hawser
KU 3 Have you a hawser
KV I intend to use my towing KV 1 I intend to use your towing KW You should have towing hawsercable ready
KW 1 Towing hawsercable is ready
KW 2 You should have another hawser ready
KW 3 You should have spare towing hawsercable ready
KW 4 Spare towing hawsercable is ready
KW 5 You should have wire hawser SECTION
Cross
Code Meaning Reference
Towing KW 6 Wire hawser is ready
KX You should be ready to receive the towing hawser
KX 1 I am ready to receive the towing hawser
KX 2 You should come closer to receive towing hawser
KX 3 I am coming closer to receive towing hawser
KX 4 I have received towing hawser
KY Length of tow is number fathoms
KZ You should shorten the towing hawser or shorten distance between vessels
KZ 1 I am shortening towing hawser or I am shortening distance between vessels
KZ 2 You should haul in the hawser
KZ 3 I am hauling in the hawser
KZ 4 You should haul in the slack
KZ 5 I am hauling in the slack
LA Towing hawsercable has parted
LA 1 Towing hawsercable is in danger of parting
LA 2 Towing hawsercable is damaged
LA 3 You should reinforce the hawsers
LA 4 I am reinforcing the hawsers
Make You should make towing hawser fast to your chain cable
LB 1 Towing hawser is fast to chain cable
LB 2 You should make towing hawser fast to wire
LB 3 Towing hawser is fast to wire
LB 4 My towing hawser is fast
LB 5 Is your towing hawser fast
LC You should make fast astern and steer me
LD You should veer your number fathoms
LE I am about to veer my 59
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Make FastVeer
LE 1 I am veering my LE 2 I have veered my LE 3 I shall veer cable attached to hawser
LE 4 How much cable should I veer
LF You should stop veering your LF 1 I cannot veer any more
Cast Off
LG You should prepare to cast off towing hawsers
LG 1 I am preparing to cast off towing hawsers
LG 2 I am ready to cast off towing hawsers
LG 3 You should cast off starboard towing hawser
LG 4 I have cast off starboard towing hawser
LG 5 You should cast off port towing hawser
LG 6 I have cast off port towing hawser
LG 7 You should cast off hawsers
LG 8 I must cast off towing hawsers
Engine Maneuvers
I am going ahead QD
My engines are going ahead QD 1
I will keep going ahead QD 2
I will go ahead QD 3
I will go ahead dead slow QD 4
I have headway QE
I cannot go ahead QF
You should go ahead QG
You should go slow ahead QG 1
You should go full speed ahead QG 2
You should keep going ahead QG 3
SECTION
Cross
Code Meaning
Reference
Engine Maneuvers
You should keep your engines going ahead QG 4
You should not go ahead any more QH
I am going astern QI
My engines are going astern QI 1
I will keep going astern QI 2
I will go astern QI 3
I will go astern dead slow QI 4
I have sternway QJ
I cannot go astern QK
You should go astern QL
You should go slow astern QL 1
You should go full speed astern QL 2
You should keep going astern QL 3
You should keep your engines going astern QL 4
You should not go astern any more QM
You should stop your engines immediately RL
You should stop your engines RL 1
My engines are stopped RM
I am stopping my engines RM 1
LH Maximum speed in tow is number knots
LI I am increasing speed
LI 1 Increase speed
LJ I am reducing speed
LJ 1 Reduce speed
CHAPTER 2
SECTION 3 AIDS TO
Cross
Code Meaning Reference
AIDS TO NAVIGATION
LK Buoy or beacon has been established in lat long
LL Buoy or beacon in lat long has been removed
You should steer directly for the buoy or object indicated PL
You should keep buoy or object indicated on your starboard side PL 1
You should keep buoy or object indicated on your port side PL 2
You can pass the buoy or object indicated on either side PL 3
LM Radiobeacon indicated is out of action
LN Light name follows has been LN 1 All lights are out along this coast or the coast of
LO I am not in my correct position to be used by a LO 1 Lightvessel name follows is out of position
LO 2 Lightvessel name follows has been removed from her station
Lightvessel or lighthouse indicated requires assistance CH 1
LP There is not less than number feet or meters of water over the bar
LQ There will be number feet or meters of water over the bar at time indicated
LR Bar is not dangerous
LR 1 What is the depth of water over the bar
LR 2 Can I cross the bar
LS Bar is dangerous
BEARINGS
LT Your bearing from me or from name or identity signal is at time indicated
LU The bearing of name or identity signal from name or identity signal is at time indi
cated
LV Let me know my bearings from you I will flash SECTION 3AIDS TO
Cross
Code Meaning
Reference
LV 1 What is my bearing from you or from name or identity signal
LV 2 What is the bearing of name or identity signal from name or identity signal
Your magnetic bearing from me or from vessel or position indicated is at time
indicated BZ
What is my magnetic bearing from you or from vessel or position indicated CA
LW I receive your transmission on bearing
LW 1 Can you take bearings from my radio signals
Your position according to bearings taken by radio direction finder stations which I control is
lat long at time indicated EZ
Will you give me my position according to bearings taken by radio direction finder stations
which you control EZ 1
Bearing and distance by radar of vessel or object indicated is bearing
distance miles OM
What is the bearing and distance by radar of vessel or object indicated OM 1
Canal
LX The canal is clear
LX 1 The canal will be clear at time indicated
LX 2 You can enter the canal at time indicated
LX 3 Is the canal clear
LX 4 When can I enter the canal
LY The canal is not clear
LZ The is navigable
LZ 1 I intend to pass through the LZ 2 Is the navigable
LZ 3 What is the state of the LZ 4 What is the least depth of water in the The least depth of water in the is
number feet or meters
MB You should keep in the center of the MB 1 You should keep on the starboard side of the
63
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Canal
MB 2 You should keep on the port side of the MB 3 You should leave the free
MC There is an uncharted obstruction in the You should proceed with caution
MC 1 The is not navigable
MC 2 The lane of the traffic separation scheme is not navigable The direction of the traf
fic flow is to be indicated
COURSE
MD My course is
MD 1 What is your course
My present position course and speed are lat long knots EV
What are your present position course and speed EV 1
Will vessels in my immediate vicinity or in the vicinity of lat long please indicate posi
tion course and speed FB
Vessel coming to your rescue or to the rescue of vessel or aircraft indicated is steering
course speed knots GR
You should indicate course and speed of vessel coming to my rescue or to the rescue of vessel
or aircraft indicated GR 1
ME The course to place name follows is
ME 1 What is the course to place name follows
The magnetic course for the helicopter to regain its base is BX
MF Course to reach me is
MF 1 What is the course to reach you
The magnetic course for you to steer towards me or vessel or position indicated
is at time indicated BW
Will you indicate the magnetic course for me to steer towards you or vessel or position
indicated BY
MG You should steer course
MG 1 What course should I steer
You should maintain your present course PI
I am maintaining my present course PI 1
SECTION 3AIDS TO
Cross
Code Meaning
Reference
I cannot maintain my present course PJ
MH You should alter course to at time I am altering course to
I am altering my course to starboard E
I am altering my course to port I
You should alter your course if possible appreciably to starboard to facilitate location by
radar OJ 2
You should alter your course if possible appreciably to port to facilitate location by radar OJ
DANGERS TO Derelict dangerous to navigation reported in lat long or Complements
Table 3 Chapter
2 Section 10 Page 104
MK I have seen derelict in lat long at time indicated
MK 1 Have you seen derelict or Derelict is drifting near lat long or bearing from place indicated ML 1 Hull of
derelict is awash
ML 2 Hull of derelict is well out of the water
MM There is a wreck in lat long
MM 1 Wreck is buoyed
MM 2 Wreck is awash
MN Wreck in lat long is not buoyed
MO I have struck a shoal or submerged object lat long
MP I am in shallow water Please direct me how to navigate
Radiation Danger
MQ There is risk of contamination due to excessive release of radioactive material in this area or
in area around lat long Keep radio watch Relay the message to vessels in your vicinity
MQ 1 The radioactive material is airborne
MQ 2 The radioactive material is There is no or no more risk of contamination due to excessive release of radioactive material
in this area or in area around lat long
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Radiation Danger
MR 1 Is there risk of contamination due to excessive release of radioactive material in this area
or in area around lat long
MS My vessel is a dangerous source of radiation
MS 1 My vessel is a dangerous source of radiation you may approach from my starboard side
MS 2 My vessel is a dangerous source of radiation you may approach from my port side
MS 3 My vessel is a dangerous source of radiation you may approach from forward
MS 4 My vessel is a dangerous source of radiation you may approach from aft
MT My vessel is a dangerous source of radiation You may approach from Complements Table
3 Chapter 2 Section 10 Page 104
MU My vessel is a dangerous source of radiation Do not approach within number cables
I am abandoning my vessel which has suffered a nuclear accident and is a possible source of
radiation danger AD
I have had a serious nuclear accident and you should approach with caution AJ
I have had a nuclear accident on board AK
A vessel which has suffered a nuclear accident is in distress in lat long EC
MV My vessel is releasing radioactive material and presents a hazard
MW My vessel is releasing radioactive material and presents a hazard Do not approach within
number cables
MX The radioactive material is airborne Do not approach from leeward
Warnings
MY It is dangerous to stop
MY 1 It is dangerous to remain in present position
MY 2 It is dangerous to proceed on present course
MY 3 It is dangerous to proceed until weather permits
MY 4 It is dangerous to alter course to starboard
MY 5 It is dangerous to alter course to port
MY 6 It is dangerous to approach close to my vessel
MY 7 It is dangerous to let go an anchor or use bottom trawl
MY 8 It is dangerous to jettison inflammable oil
It is not safe to fire a rocket GU
SECTION 3AIDS TO
Cross
Code Meaning
Reference
Warnings
MZ Navigation is dangerous in the area around lat long
MZ 1 I consider you are carrying out a dangerous navigational practice and I intend to report
Navigation is dangerous in the area around lat long owing to icebergs VZ
Navigation is dangerous in the area around lat long owing to floating ice VZ 1
Navigation is dangerous in the area around lat long owing to pack ice VZ 2
NA Navigation is closed
NA 1 Navigation is possible only with tug assistance
NA 2 Navigation is possible only with pilot assistance
NA 3 Navigation is prohibited within 500m of this platform
NA 4 Navigation is prohibited within 500m of the platform bearing from me
NA 5 You have been detected navigating within a 500m Safety Zone about the platform bear
ing from me and will be reported
NA 6 Anchors with buoys extend up to one mile from this vesselrig You should keep clear
You should navigate with caution Small fishing boats are within number
miles of me TH
You should navigate with caution You are drifting towards my set of nets TI
You should navigate with caution There are nets with a buoy in this area TJ
NB There is fishing gear in the direction you are heading or in direction Table 3 Chapter 2 Section 10 Page 104
NC I am in distress and require immediate Tsunami phenomenal wave is expected You should take appropriate
Tropical storm cyclone hurricane typhoon is approaching You should take appropriate
precautions VL
NE You should proceed with great caution
NE 1 You should proceed with great caution the coast is dangerous
NE 2 You should proceed with great caution submarines are exercising in this area
NE 3 You should proceed with great caution there is a boom across
NE 4 You should proceed with great caution keep clear of firing range
NE 5 You should proceed with great caution hostile vessel sighted in lat long
NE 6 You should proceed with great caution hostile submarine sighted in lat
67
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Warnings
NE 7 You should proceed with great caution hostile aircraft sighted in lat long
There is an uncharted obstruction in the You should proceed with
caution MC
You should change your It is not safe RE
All vessels should proceed to sea as soon as possible owing to danger in port UL
NF You are running into danger U
NF 1 You are running into danger there is a radiation hazard
NG You are in a dangerous position
NG 1 You are in a dangerous position there is a radiation hazard
NH You are clear of all danger
NH 1 Are you clear of all danger
NI I have or vessel indicated has a list of number degrees to starboard
NJ I have or vessel indicated has a list of number degrees to port
Depth
NK There is not sufficient depth of water
NL There is sufficient depth of water
NL 1 Is there sufficient depth of water
The least depth of water in the is number feet or meters MA
What is the least depth of water in the LZ 4
There is not less than number feet or meters of water over the bar LP
What is the depth of water over the bar LR 1
There will be number feet or meters of water over the bar at time indicated LQ
The depth at high water here or in place indicated is number feet or meters QA
The depth at low water here or in place indicated is number feet or meters QB
What is the depth at high and low water here or in place indicated PW 2
NM You should report the depth around your vessel
NN I am in number feet or meters of SECTION 3AIDS TO
Cross
Code Meaning Reference
Depth
NO or The significance of the previous group should be read in the The depth of water at the bow is number feet or
meters
NQ The depth of water at the stern is number feet or meters
NR The depth of water along the starboard side is number feet or meters
NS The depth of water along the port side is number feet or meters
Procedural signal
Draft
NT What is your draft
NT 1 What is your light draft
NT 2 What is your ballast draft
NT 3 What is your loaded draft
NT 4 What is your summer draft
NT 5 What is your winter draft
NT 6 What is your maximum draft
NT 7 What is your least draft
NT 8 What is your draft forward
NT 9 What is your draft aft
NU My draft is number feet or meters
NV My light draft is number feet or meters
NW My ballast draft is number feet or meters
NX My loaded draft is number feet or meters
NY My summer draft is number feet or meters
NZ My winter draft is number feet or meters
OA My maximum draft is number feet or meters
OB My least draft is number feet or meters
OC My draft forward is number feet or meters
OD My draft aft is number feet or meters
My maximum draft when I went aground was number feet or meters JJ
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Draft
What was your draft when you went aground JI 1
OE Your draft must not exceed number feet or meters
OF I could lighten to number feet or meters draft
OG To what draft could you lighten
ELECTRONIC NAVIGATION
Radar
OH You should switch on your radar and keep radar watch
OH 1 The restrictions on the use of radar are lifted
OH 2 Does my radar cause OI I have no radar
OI 1 Are you equipped with radar
OI 2 Is your radar in operation
OJ I have located you on my radar bearing distance miles
OJ 1 I cannot locate you on my radar
OJ 2 You should alter your course if possible appreciably to starboard to facilitate location by
radar
OJ 3 You should alter your course if possible appreciably to port to facilitate location by radar
OJ 4 Can you locate me by radar
My position is ascertained by radar EW 4
OK Acknowledging a correct repetition or It is correct
OL Is radar pilotage being effected in this port or port indicated
OM Bearing and distance by radar of vessel or object indicated is bearing distance miles
OM 1 What is the bearing and distance by radar of vessel or object indicated
ON I have an echo on my radar on bearing distance miles
Procedural signal
Radio Direction Finder
OO My radio direction finder is SECTION 3AIDS TO
Cross
Code Meaning
Reference
Radio Direction Finder
OP I have requested name or identity signal to send two dashes of ten seconds each or the car
rier of his transmitter followed by his call sign
OP 1 Will you request name or identity signal to send two dashes of ten seconds each or the
carrier of his transmitter followed by his call sign
OP 2 Will you send two dashes of ten seconds each or the carrier of your transmitter followed
by your call sign
Your position according to bearings taken by radio direction finder stations which I control is
lat long at time indicated EZ
Will you give me my position according to bearings taken by radio direction finder stations
which you control EZ 1
OQ I am calibrating radio direction finder or adjusting compasses
Electronic System
My position is ascertained by electronic position fixing system EW 5
I have struck a mine
I have a mine in my sweep or net TO
OS There is danger from mines in this area or area indicated
OS 1 You should keep a lookout for mines
OS 2 You are out of the dangerous zone
OS 3 Am I out of the dangerous zone
OS 4 Are you out of the dangerous zone
OS 5 Is there any danger from mines in this area or area Mine has been sighted in lat long or in direction Table 3
Chapter 2 Section 10 Page 104
OU Mines has have been reported in the vicinity or in approximate position lat long
OV Mines is are believed to be bearing from me distance miles
OW There is a minefield ahead of you You should stop your vessel and wait for OW 1 There is a minefield along the coast You
should not approach too close
OX The approximate direction of the minefield is bearing from me
OY Port is mined
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
OY 1 Entrance is mined
OY 2 Fairway is mined
OY 3 Are there mines in the port entrance or fairway
OZ The width of the swept channel is number feet or meters
PA I will indicate the swept channel You should follow in my wake
PA 1 You should keep carefully to the swept channel
PA 2 The swept channel is marked by buoys
PA 3 I do not see the buoys marking the swept channel
PA 4 Do you know the swept channel
PB You should keep clear of me I am engaged in minesweeping operations
PB 1 You should keep clear of me I am exploding a floating mine
PC I have destroyed the drifting mines
PC 1 I cannot destroy the drifting mines
The use of this signal does not relieve any vessel from complying with the International Regulations for Preventing
Collisions at Sea 1972
NAVIGATION PD Your navigation lights is are not visible
PD 1 My navigation lights are not PE You should extinguish all the lights except the navigation lights
PG I do not see any light
PG 1 You should hoist a light
PG 2 I am dazzled by your searchlight Extinguish it or lift it
You should train your searchlight nearly vertical on a cloud if possible and if
my aircraft is seen deflect the beam upwind and on the water to facilitate my landing AX
Shall I train my searchlight nearly vertical on a cloud if possible and if your
aircraft is seen deflect the beam upwind and on the water to facilitate your landing AX 1
SECTION 3AIDS TO
Cross
Code Meaning Reference
NAVIGATING AND STEERING INSTRUCTIONS
See also Pilot in Chapter 2 Section 5 Page 87
PH You should steer as indicated
PH 1 You should steer towards me
PH 2 I am steering towards you
PH 3 You should steer more to starboard
PH 4 I am steering more to starboard
PH 5 You should steer more to port
PH 6 I am steering more to port
PI You should maintain your present course
PI 1 I am maintaining my present course
PI 2 Shall I maintain my present course
PJ I cannot maintain my present course
You should make fast astern and steer me LC
PK I cannot steer without You should steer directly for the buoy or object indicated
PL 1 You should keep buoy or object indicated on your starboard side
PL 2 You should keep buoy or object indicated on your port side
PL 3 You can pass the buoy or object indicated on either side
PM You should follow in my wake or wake of vessel indicated
PM 1 You should go ahead and lead the course
PN You should keep to leeward of me or vessel indicated
PN 1 You should keep to windward of me or vessel indicated
PN 2 You should keep on my starboard side or starboard side of vessel indicated
PN 3 You should keep on my port side or port side of vessel You should pass ahead of me or vessel indicated
PO 1 I will pass ahead of you or vessel indicated
PO 2 You should pass astern of me or vessel indicated
PO 3 I will pass astern of you or vessel indicated
PO 4 You should pass to leeward of me or vessel
73
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning Reference
PO 5 I will pass to leeward of you or vessel indicated
PO 6 You should pass to windward of me or vessel indicated
PO 7 I will pass to windward of you or vessel indicated
PO 8 You should come under my stern
PP Keep well clear of me
PP 1 Do not overtake me
PP 2 Do not pass ahead of me
PP 3 Do not pass astern of me
PP 4 Do not pass on my starboard side
PP 5 Do not pass on my port side
PP 6 Do not pass too close to me
PP 7 You should give way to me
PQ You should keep closer in to the coast
PQ 1 You should keep further away from the coast
PQ 2 You should follow the coast at a safe distance
PQ 3 How far out from the coast
PR You should keep closer to me or vessel indicated
PR 1 You should come as near as possible
PR 2 You should keep within visual signal distance from me or vessel indicated
PR 3 You should come within hailing distance from me or vessel indicated
PS You should not come any closer
PS 1 You should keep away from me or vessel indicated
I am calibrating radio direction finder or adjusting compasses OQ
TIDE
PT What is the state of the tide
PT 1 The tide is rising
PT 2 The tide is falling
PT 3 The tide is slack
PU The tide begins to rise at time SECTION 3AIDS TO
Cross
Code Meaning Reference
PU 1 When does the tide begin to rise
PV The tide begins to fall at time indicated
PV 1 When does the tide begin to fall
PW What is the rise and fall of the tide
PW 1 What is the set and drift of the tide
PW 2 What is the depth at high and low water here or in place The rise and fall of the tide is number feet or meters
PY The set of the tide is degrees
PZ The drift of the tide is knots
QA The depth at high water here or in place indicated is number feet or meters
QB The depth at low water here or in place indicated is number feet or meters
The tide was high water when the vessel went aground JK
The tide was half water when the vessel went aground JK 1
The tide was low water when the vessel went aground JK 2
At what state of tide did you go aground JI 3
QC You should wait until high water
QC 1 You should wait until low water
CHAPTER 2
SECTION 4 MANEUVERS
Cross
Code Meaning
Reference
QD I am going ahead
QD 1 My engines are going ahead
QD 2 I will keep going ahead
QD 3 I will go ahead
QD 4 I will go ahead dead slow
QE I have headway
QF I cannot go ahead
QG You should go ahead
QG 1 You should go slow ahead
QG 2 You should go full speed ahead
QG 3 You should keep going ahead
QG 4 You should keep your engines going ahead
QH You should not go ahead any more
QI I am going astern
QI 1 My engines are going astern S
QI 2 I will keep going astern
QI 3 I will go astern
QI 4 I will go astern dead slow
QJ I have sternway
QK I cannot go astern
QL You should go astern
QL 1 You should go slow astern
QL 2 You should go full speed astern
QL 3 You should keep going astern
QL 4 You should keep your engines going astern
QM You should not go astern any more
SECTION
Cross
Code Meaning Reference
ALONGSIDE
QN You should come alongside my starboard side
QN 1 You should come alongside my port side
QN 2 You should drop an anchor before coming You should not come I will come alongside
QP 1 I will try to come I require health clearance See Pratique Messages in Chapter 2 Section 9 Page 103
QR I cannot come alongside
QR 1 Can I come alongside
TO To Anchor
QS You should anchor at time indicated
QS 1 You should anchor position to be indicated if necessary
QS 2 You should anchor to await tug
QS 3 You should anchor with both anchors
QS 4 You should anchor as convenient
QS 5 Are you going to anchor
You should heave to or anchor until pilot arrives UB
QT You should not anchor You are going to foul my anchor
QU Anchoring is I am anchoring in position indicated
QV 1 I have anchored with both anchors
QW I shall not anchor
QW 1 I cannot anchor
QX I request permission to anchor
QX 1 You have permission to anchor
QY I wish to anchor at once
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
To Anchor
QY 1 Where shall I anchor
Anchors
QZ You should have your anchors ready for letting go
QZ 1 You should let go another anchor
RA My anchor is foul
RA 1 I have picked up telegraph cable with my anchor
RB I am dragging my anchor Y
RB 1 You appear to be dragging your anchor
RB 2 Where you have anchored or intend to anchor you are likely to drag
RC I am or vessel indicated is breaking adrift
RC 1 I have broken adrift
RD You should weigh cut or slip anchor RD 1 You should weigh anchor at time indicated
RD 2 I am unable to weigh my anchor
Anchorage
RE You should change your It is not safe
RF Will you lead me into a safe anchorage
You should tow me to the nearest port or anchorage or place indicated KP
I will tow you to the nearest port or anchorage or place indicated KP 1
I must get shelter or anchorage as soon as possible KP 2
RG You should send a boat to where I am to anchor or moor
RG 1 At what time shall I come into anchorage
You should proceed to anchorage in position indicated lat long RW
You should not proceed out of RZ 1
RH There is no good holding ground in my area or around lat long
RI There is good holding ground in my area or around lat long
RI 1 Is there good holding ground in your area or around lat SECTION
Cross
Code Meaning
Reference
Engines
RJ You should keep your engines ready
RJ 1 You should have your engines ready as quickly as possible
RJ 2 You should report when your engines are ready
RJ 3 You should leave when your engines are ready
RJ 4 At what time will your engines be ready
RK My engines will be ready at time indicated
RK 1 My engines are ready
RL You should stop your engines RL 1 You should stop your engines
RM My engines are stopped
RM 1 I am stopping my engines
RM 2 I am obliged to stop my engines
RN My engines are out of action
I can only proceed with one engine IL 1
Propeller
RO Propeller shaft is broken
RO 1 My propeller is fouled by hawser or rope
RO 2 I have lost my propeller
I require immediate assistance propeller shaft is broken CB 8
Landing
RP Landing here is highly dangerous
RP 1 Landing here is highly dangerous A more favorable location for landing is at position
Interrogative or the significance of the previous group should be read as a This is the best place to land
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
Landing
RR 1 Lights will be shown or flag waved at the best landing place
Boat should endeavor to land where flag is waved or light is shown DC
Boats are not allowed to land after time indicated DD 1
Reference is made to landing signals prescribed by the International Convention for the Safety of Life at Sea 1974
Regulation 16b Chapter V for the guidance of small boats with crews or persons in distress
Procedural signal
Boarding
RS No one is allowed on board
You should stop or heave to I am going to board you SQ 3
MANEUVERS
RT Stop carrying out your intentions and watch for my signals X
RT 1 What maneuvers do you intend to carry out
RU Keep clear of me I am maneuvering with difficulty D
RU 1 I am carrying out maneuvering trials
Proceed
RV You should proceed to place indicated if necessary
RV 1 You should proceed to RV 2 You should proceed into port
RV 3 You should proceed to sea
RW You should proceed to anchorage in position indicated lat long
RX You should proceed at time indicated
RY You should proceed at slow speed when passing me or vessels making this signal
You should proceed to the rescue of vessel or ditched aircraft in lat long GP
You should proceed to lat long to pick up survivors HN
You should proceed with great caution NE
SECTION
Cross
Code Meaning
Reference
Proceed
You should proceed with great caution the coast is dangerous NE 1
You should proceed with great caution submarines are exercising in this area NE 2
You should proceed with great caution there is a boom across NE 3
You should proceed with great caution keep clear of firing range NE 4
You should proceed with great caution hostile vessel sighted in lat long NE 5
You should proceed with great caution hostile submarine sighted in lat long NE 6
You should proceed with great caution hostile aircraft sighted in lat long NE 7
RZ You should not proceed to place indicated if necessary
RZ 1 You should not proceed out of All vessels should proceed to sea as soon as possible owing to danger in port
UL
SA I can proceed at time I am proceeding to the position of accident
I am or vessel indicated is proceeding to your assistance CP
I am proceeding to the assistance of in distress lat long CR
I am proceeding to the position of accident at full speed Expect to arrive at time indicated FE
Are you proceeding to the position of accident If so when do you expect to arrive FE 1
I cannot proceed to the rescue owing to weather You should do all you can GQ
I will try to proceed by my own means but I request you to keep in contact with me
by Complements Table 1 Chapter 2 Section 10 Page 104 IJ
I can proceed at number knots IK
I can only proceed at slow speed IL
I can only proceed with one engine IL 1
I am unable to proceed under my own power IL 2
Are you in a condition to proceed IL 3
I have placed the collision mat I can proceed without assistance KA 1
Underway
SC I am underway
SC 1 I am ready to get underway
SC 2 I shall get underway as soon as the weather permits
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Underway
SD I am not ready to get underway
SF Are you or vessel indicated underway
SF 1 Are you ready to get underway
SF 2 At what time will you be underway
SPEED
SG My present speed is number knots
SJ My maximum speed is number knots
SL What is your present speed
SL 1 What is your maximum speed
The speed of my aircraft in relation to the surface of the earth is knots or kilometers per
hour BQ
What is the speed of your aircraft in relation to the surface of the earth BQ 1
My present position course and speed are lat long knots EV
What are your present position course and speed EV 1
Will vessels in my immediate vicinity or in the vicinity of lat long please indicate posi
tion course and speed FB
I can only proceed at slow speed IL
Maximum speed in tow is number knots LH
I am increasing speed LI
Increase speed LI 1
I am reducing speed LJ
Reduce speed LJ 1
You should proceed at slow speed when passing me or vessels making this signal RY
Take the way off your vessel SP
My vessel is stopped and making no way through the water SP 1
SM I am undergoing speed SECTION
Cross
Code Meaning
Reference
STOPHEAVE TO
SN You should stop immediately Do not scuttle Do not lower boats Do not use the wireless If
you disobey I shall open fire on you
SO You should stop your vessel instantly L
SO 1 You should stop Head offshore
SO 2 You should remain where you are
SP Take the way off your vessel
SP 1 My vessel is stopped and making no way through the water M
SQ You should stop or heave to
SQ 1 You should stop or heave to otherwise I shall open fire on you
SQ 2 You should stop or heave to I am going to send a boat
SQ 3 You should stop or heave to I am going to board you
You should heave to or anchor until pilot arrives UB
I am or vessel indicated is stopped in thick fog XP
CHAPTER 2
SECTION 5
Cross
Code Meaning
Reference
ST What is your cargo
SU My cargo is agricultural products
SU 1 My cargo is coal
SU 2 My cargo is dairy products
SU 3 My cargo is fruit products
SU 4 My cargo is heavy SU 5 My cargo is livestock
SU 6 My cargo is lumber
SU 7 My cargo is oilpetroleum products
SU 8 I have a general cargo
SV I am not seaworthy due to shifting of cargo or ballast
SW I am taking in or discharging or carrying dangerous goods B
SX You should not discharge oil or oily mixture
SY The discharge of oil or oily mixture in this area is prohibited within number miles from the
nearest land
CREWPERSONS ON BOARD
SZ Total number of persons on board is
TA I have left number men on board
TB number persons have died
TC number persons are sick
I am alighting in position indicated if necessary to pick up crew of AV
I cannot alight but I can lift crew AZ
You cannot alight on the deck Can you lift crew BA 1
should approach vessel as near as possible to take off persons DA
All persons saved GZ
All persons lost GZ 1
I or rescue have rescued number injured persons HA
Can I transfer rescued persons to you HD
SECTION
Cross
Code Meaning
Reference
FISHERY
TD I am a fish catch carrier boat
TD 1 I am a mother ship for fishing vessels
TD 2 Are you a fishing vessel
TE I am bottom trawling
TE 1 I am trawling with a floating trawl
TE 2 I am longline fishing
TE 3 I am fishing with towing lines
TE 4 I am engaged in twoboat fishing operation
TE 5 I am drifting on my nets
TE 6 In what type of fishing are you engaged
TF I am shooting purse seine
TF 1 I am shooting drift nets
TF 2 I am shooting seine net
TF 3 I am shooting trawl
TF 4 I am shooting long lines
TG I am hauling purse seine
TG 1 I am hauling drift nets
TG 2 I am hauling seine net
TG 3 I am hauling trawl
TG 4 I am hauling long lines
TH You should navigate with caution Small fishing boats are within number miles of me
TI You should navigate with caution You are drifting towards my set of nets
TJ You should navigate with caution There are nets with a buoy in this area
There is fishing gear in the direction you are heading or in direction Table 3 Chapter 2 Section 10 Page 104
NB
TK Is there fishing gear set up on my course
TL My gear is close to the surface in a direction Complements Table 3 Chapter 2 Section 10
Page 104 for a distance of miles
Displaying any of the signals in this section does not relieve vessels from compliance with the International Regu
lations for Preventing Collisions at Sea 1972
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning Reference
TM My gear is well below the surface in a direction Complements Table 3 Chapter 2 Section
10 Page 104 for a distance of miles
TN In what direction distance and depth does your fishing gear extend
TO I have a mine in my sweep or net
TP Fishing gear has fouled my propeller
TQ You have caught my fishing gear
TQ 1 It is necessary to haul in fishing gear for TQ 2 I am clearing the fishing gear
TQ 3 You should take measures to recover the fishing gear
TS You should take the following action with your warps
TS 1 Veer the port stern warp
TS 2 Veer the starboard fore warp
TS 3 Veer both warps
TS 4 Stop veering
TS 5 Haul the port stern warp
TS 6 Haul the starboard fore warp
TS 7 Haul both warps
TS 8 Stop hauling
TS 9 You may haul your warps the trawl is clear
TU I have to cut the warps The trawls are entangled
TU 1 Give me your warp I shall transfer your fishing gear on it
TU 2 Your warps are under mine
TU 3 Both my warps have parted
TU 4 My starboard fore warp has parted
TU 5 My port stern warp has parted
TV Fishing in this area is prohibited
TV 1 Trawling in this area is dangerous because there is an TW Attention You are in the vicinity of prohibited fishery limits
TX A fishery protection or fishery assistance vessel is in lat long
TY I request assistance from fishery protection or fishery assistance vessel
TZ Can you offer assistance Complements Table 2 Chapter 2 Section 10 Page 104
SECTION
Cross
Code Meaning
Reference
PILOT
See also Navigating and Steering instructions in Chapter 2 Section 3 Page 73
UA Pilot will arrive at time You should heave to or anchor until pilot arrives
I have a pilot on board H
UC Is a pilot available in this place or place indicated
I require a pilot G
UE Where can I get a pilot for destination indicated if You should follow pilot boat or vessel You should steer
in my wake
You should follow in my wake or wake of vessel indicated PM
You should go ahead and lead the course PM 1
UH Can you lead me into port
UI Sea is too rough pilot boat cannot get off to you
UJ Make a starboard lee for the pilot boat
UJ 1 Make a port lee for the pilot boat
UK Pilot boat is most likely on bearing from you
UK 1 Have you seen the pilot boat
Is radar pilotage being effected in this port or port indicated OL
All vessels should proceed to sea as soon as possible owing to danger in port
UM The harbor or port indicated is closed to traffic
You should not proceed out of RZ 1
UN You may enter the harbor immediately or at time indicated
UN 1 May I enter harbor
UN 2 May I leave harbor
UO You must not enter harbor
UP Permission to enter harbor is urgently requested I have an emergency case
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
You should proceed into port RV 2
Can you lead me into port UH
UQ You should wait outside the harbor or river mouth
UQ 1 You should wait outside the harbor until daylight
UR My estimated time of arrival at place indicated is time indicated
UR 1 What is your estimated time of arrival at place indicated
US Nothing can be done until time indicated
US 1 Nothing can be done until daylight
US 2 Nothing can be done until tide has risen
US 3 Nothing can be done until visibility improves
US 4 Nothing can be done until weather moderates
US 5 Nothing can be done until draft is lightened
US 6 Nothing can be done until tugs have arrived
UT Where are you bound for
UT 1 Where are you coming from
UU I am bound for
UV I am coming from
UV 1 I am conducting innocent passage in the territorial sea
UV 2 Your course leads into an area of the territorial sea in which the right of innocent passage
is temporarily suspended
UV 3 You should leave the area of the territorial sea in which the right of innocent passage is
temporarily suspended
UV 4 You are violating the conditions of innocent passage through the territorial sea as indi
cated in the table of complements below Request you comply with the conditions of
innocent passage through the territorial sea
UV 5 I am not violating the conditions of innocent passage through the territorial sea as indi
cated in the table of complements below
UV 6 I have ceased violating the conditions of innocent passage through the territorial sea as
indicated in the table of complements below
UV 7 Having disregarded our request for compliance with the conditions of innocent passage
through the territorial sea you are required to leave the territorial sea SECTION
Cross
Code Meaning
Reference
UV 8 I am conducting transit passage through an international Strait
UV 9 I am exercising freedom of Signals UV 1 UV 9 are not mandatory Use of these signals is not a precondition to the exercise of the
right of
innocent passage or freedom of navigation
Conditions of innocent passage Complements 09 corresponding to the following table
0 By threatening or using force against ouryour sovereignty territorial integrity or political
1 By exercising or practicing with weapons
2 By engaging in acts aimed at collecting information to the prejudice of ouryour defense or
security
3 By engaging in acts of propaganda aimed at affecting ouryour defense or security
4 By engaging in the launching landing or taking on board of aircraft or a military device
5 By engaging in the loading or unloading of a commodity currency or person contrary to the
customs fiscal immigration or sanitary laws or regulations of ouryour country
6 By engaging in willful and serious pollution
7 By engaging in fishing activities
8 By engaging in research or survey activities
9 By engaging in acts aimed at interfering with ouryour systems of communication or other
facilities or I wish you a pleasant voyage
UW 1 Thank you very much for your cooperation I wish you a pleasant voyage
UW 2 Welcome
UW 3 Welcome Home
UX No information available
I am unable to answer your question YK
Exercises
UY I am carrying out exercises Please keep clear of me
Bunkers
UZ I have bunkers for number hours
VB Have you sufficient bunkers to reach port
VC Where is the nearest place at which fuel oil is available
VC 1 Where is the nearest place at which diesel oil is
89
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
Bunkers
VC 2 Where is the nearest place at which coal is available
VD Bunkers are available at place indicated or lat long
Fumigation
VE I am fumigating my vessel
No one is allowed on board RS
What is the name or identity signal of your vessel or station CS
VF You should hoist your identity CHAPTER 2
SECTION 6
Cross
Code Meaning
Reference
CLOUDS
VG The coverage of low clouds is number of octants or eighths of sky covered
VH The estimated height of base of low clouds in hundreds of meters is
VI What is the coverage of low clouds in octants eighths of sky covered
VI 1 What is the estimated height of base of low clouds in hundreds of meters
STORM
Gale
VJ Gale wind force Beaufort 89 is expected from direction indicated Complements Table 3
Chapter 2 Section 10 Page 104
Storm
VK Storm wind force Beaufort 10 or above is expected from direction indicated Complements
Table 3 Chapter 2 Section 10 Page 104
Tropical Storm
VL Tropical storm cyclone hurricane typhoon is approaching You should take appropriate pre
cautions
VM Tropical storm is centered at time indicated in lat long on course speed knots
VN Have you latest information of the tropical storm near lat long if necessary
Very deep depression is approaching from direction indicated Complements Table 3 Chapter
2 Section 10 Page 104 WT
There are indications of an intense depression forming in lat long WU
VO Have you encountered ice
VP What is the character of ice its development and the effects on Character of ice
VQ 0 No ice
VQ 1 New ice ice crystals slush or sludge pancake ice or ice rind
VQ 2 Young fast ice 515 cms thick or rotten fast ice
CHAPTER 2GENERAL SIGNAL CODE
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Code Meaning
Reference
VQ 3 Open drift ice not more than 58 of the water surface is covered by ice floes
VQ 4 A compressed accumulation of sludge a compressed mass of sludge or pancake ice the
ice cannot spread
VQ 5 Winter fast ice more than 15 cms in thickness
VQ 6 Close drift ice the area is covered by ice floes to a greater extent than 58
VQ 7 Very close drift ice on open sea
VQ 8 Pressure ice or big vast heavy ice floes
VQ 9 Shore lead along the coast
No information available UX
VR Ice VR 0 No change
VR 1 Ice situation has improved
VR 2 Ice situation has VR 3 Ice has been broken up
VR 4 Ice has opened or drifted away
VR 5 New ice has been formed andor the thickness of the ice has increased
VR 6 Ice has been frozen together
VR 7 Ice has drifted into the area or has been squeezed together
VR 8 Warning of pressure ridges
VR 9 Warning of hummocking or ice screwing
No information available UX
VS Effects of the ice on navigation
VS 0 VS 1 Unobstructed for powerdriven vessels built of iron or steel dangerous for wooden vessels
without ice protection
VS 2 Difficult for lowpowered vessels without the assistance of an icebreaker dangerous for
vessels of weak VS 3 Possible without icebreaker only for highpowered vessels of strong VS 4 Icebreaker assistance
available in case of need
VS 5 Proceed in channel without the assistance of SECTION
Cross
Code Meaning
Reference
VS 6 Possible only with the assistance of an icebreaker
VS 7 Icebreaker can give assistance only to ships strengthened for navigation in ice
VS 8 Temporarily closed for navigation
VS 9 Navigation has ceased
No information available UX
VT Danger of ice accretion on for example black frost
VT 1 I am experiencing heavy icing on I have seen icefield in lat long
VV Ice patrol ship is not on station
VV 1 Ice patrol ship is on station
Icebergs
VW I have seen icebergs in lat long
VX I have encountered one or more icebergs or growlers with or without position and time
VY One or more icebergs or growlers have been reported with or without position and time
VZ Navigation is dangerous in the area around lat long owing to icebergs
VZ 1 Navigation is dangerous in the area around lat long owing to floating ice
VZ 2 Navigation is dangerous in the area around lat long owing to pack ice
Repeat word or group after
WB Repeat word or group before
WC I am or vessel indicated is fast on ice and requires icebreaker assistance
WC 1 Icebreaker is being sent to your assistance
I require assistance in the nature of icebreaker CD 9
WD Icebreaker is not available
WD 1 Icebreaker cannot render assistance at present
Special single letter signals for use between icebreakers and assisted vessels can be found in Chapter 1 Section 10
Pages 24 and 25
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
Reference
WE Navigation channel is being kept open by icebreaker
WF I can give icebreaker support only up to lat long
WG Open channel or open area is in the direction in which aircraft is flying
WH I can only assist if you will make all efforts to follow
WI At what time will you follow at full speed
WJ The convoy will start at time indicated from here or from lat long
WK You or vessel indicated will be number in convoy
WL Icebreaker is stopping work during darkness
WM Icebreaker support is now commencing Use special icebreaker support signals and keep con
tinuous watch for sound visual or signals
WN Icebreaker is stopping work for number hours or until more favorable conditions arise
WO Icebreaker support is finished Proceed to your You should go astern
QL
Procedural signals
ATMOSPHERIC Atmospheric Pressure
WP Barometer is steady
WP 1 Barometer is falling rapidly
WP 2 Barometer is rising rapidly
WQ The barometer has fallen number millibars during the past three hours
WR The barometer has risen number millibars during the past three hours
WS Corrected atmospheric pressure at sea level is number millibars
WS 1 State corrected atmospheric pressure at sea level in millibars
WT Very deep depression is approaching from direction indicated Complements Table 3 Chap
ter 2 Section 10 Page 104
WU There are indications of an intense depression forming in lat long
Temperature
WV The air temperature is subzero SECTION
Cross
Code Meaning Reference
Temperature
WV 1 The air temperature is expected to be subzero SEASWELL
WW What are the sea conditions in your area or around lat long
WX The true direction of the sea in tens of degrees is number following indicates tens of
degrees
WY The state of the sea is Complements 09 corresponding to the following table which mea
sures wave height
0 Calm glassy 0m 0 ft
1 Calm rippled 001m 013 ft
2 Smooth wavelets 1 2
0105m 31 3 ft
3 Slight 0512 m 1 234 ft
4 Moderate 12525m 48 ft
5 Rough 254m 813 ft
6 Very rough 46m 1320 ft
7 High 69m 2030 ft
8 Very high 914m 3045 ft
9 Phenomenal over 14m over 45 ft
WZ What are the forecast sea conditions in my area or area around lat long
XA The true direction of the sea in tens of degrees is expected to be number following indi
cates tens of degrees
XB The state of the sea is expected to be Complements 09 as in the table above
Swell
XC What are the swell conditions in your area or area around lat long
XD The true direction of the swell in tens of degrees is number following indicates tens of
degrees
XE The state of the swell is Complements 09 corresponding to the following table
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning
height 2 m 6 ft
0 No 1 short or 2 height 24 m 612 ft
3 4 5 height 4 m 12 ft
6 7 8 9 Confused
XF What are the forecast swell conditions in my area or area around lat long
XG The true direction of the swell in tens of degrees is expected to be number following indi
cates tens of degrees
XH The state of the swell is expected to be Complements 09 as in the table above
Tsunami phenomenal wave is expected You should take appropriate precautions ND
XI Indicate visibility
XJ Visibility is number tenths of nautical miles
XK Visibility is variable between and maximum and minimum in tenths of nautical miles
XL Visibility is decreasing
XL 1 Visibility is increasing
XL 2 Visibility is variable
XM What is the forecast visibility in my area or area around lat long
XN Visibility is expected to be number tenths of nautical miles
XO Visibility is expected to decrease
XO 1 Visibility is expected to increase
XO 2 Visibility is expected to be variable
XP I am or vessel indicated is stopped in thick fog
XP 1 I am entering zone of restricted SECTION
Cross
Code Meaning Reference
FORECAST
XQ What weather are you Weather is good
XR 1 Weather is bad
XR 2 Weather is moderating
XR 3 Weather is Weather report is not Weather expected is bad
XT 1 Weather expected is good
XT 2 No change is expected in the weather
XT 3 What weather is expected
XU You should wait until the weather moderates
XU 1 I will wait until the weather Please give weather forecast for my area or area around lat long in MAFOR Code
MAFOR is the prefix used to identify an International Coded Weather Forecast for Shipping
WIND
XW What is the true direction and force of wind in your area or area around lat long
XX True direction of wind is Complements Table 3 Chapter 2 Section 10 Page 104
XY Wind force is Beaufort Scale numerals 012
XZ What is the wind doing
XZ 1 The wind is backing
XZ 2 The wind is veering
XZ 3 The wind is increasing
XZ 4 The wind is squally
XZ 5 The wind is steady in force
XZ 6 The wind is What wind direction and force is expected in my area or area around lat
97
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning Reference
YB True direction of wind is expected to be Complements Table 3 Chapter 2 Section 10 Page
YC Wind force expected is Beaufort Scale numerals 012
YD What is the wind expected to do
YD 1 The wind is expected to back
YD 2 The wind is expected to veer
YD 3 The wind is expected to increase
YD 4 The wind is expected to become squally
YD 5 The wind is expected to remain steady in force
YD 6 The wind is expected to CHAPTER 2
SECTION 7 ROUTING OF SHIPS
Cross
Code Meaning You
appear not to be complying with the traffic separation scheme
It is dangerous to proceed on present course MY 2
You should proceed with great caution NE
You are in a dangerous position NG
CHAPTER 2
SECTION 8
Cross
Code Meaning
Reference
YH I have received the following from name or identity signal of vessel or station
YI I have received the safety signal sent by name or identity signal
YJ Have you received the safety signal sent by name or identity signal
YK I am unable to answer your question
Received or I have received your last signal R
Procedural signal
CALLING
YL I will call you again at hours on kHz or MHz
YM Who is calling me
CANCEL
YN Cancel my last My last signal was incorrect I will repeat it correctly
ZP
COMMUNICATE
I wish to communicate with you by Complements Table 1 Chapter 2 Section 10 Page 104 K
I wish to communicate with you K
YO I am going to communicate by Complements Table 1 Chapter 2 Section 10 Page 104
YP I wish to communicate with vessel or coast station identity signal by Complements Table
1 Chapter 2 Section 10 Page 104
YQ I wish to communicate by Complements Table 1 Chapter 2 Section 10 Page 104 with
vessel bearing from me
YR Can you communicate by Complements Table 1 Chapter 2 Section 10 Page 104
YS I am unable to Complements Table 1 Chapter 2 Section 10 Page 104
YT I cannot read your Complements Table 1 Chapter 2 Section 10 Page 104
YU I am going to communicate with your station by means of the International Code of Signals
YV The groups which follow are from the International Code of Signals
YV 1 The groups which follow are from the local SECTION
Cross
Code Meaning
I wish to communicate by on frequency I wish to communicate by on frequency I wish to communicate by VHF
on channel The words which follow are in plain language
ZA I wish to communicate with you in language indicated by following ZA 0 Dutch
ZA 1 English
ZA 2 French
ZA 3 German
ZA 4 Greek
ZA 5 Italian
ZA 6 Japanese
ZA 7 Norwegian
ZA 8 Russian
ZA 9 Spanish
ZB I can communicate with you in language indicated complements as above
ZC Can you communicate with me in language indicated complements as above
ZD Please communicate the following to all shipping in the vicinity
ZD 1 Please report me to Coast Guard New York
ZD 2 Please report me to Lloyds London
ZD 3 Please report me to Minmorflot Moscow
ZD 4 Please report me to MSA Tokyo
ZE You should come within visual signal distance
You should keep within visual signal distance from me or vessel indicated PR 2
I have established with the aircraft in distress on 2182 kHz BC
Can you communicate with the aircraft BC 1
I have established with the aircraft in distress on kHz BD
I have established with the aircraft in distress on MHz BE
With one numeral
The abbreviation INTERCO may also be used to mean Code groups
101
CHAPTER 2GENERAL SIGNAL CODE
Cross
Code Meaning Reference
EXERCISE
ZF I wish to exercise signals with you by Complements Table 1 Chapter 2 Section 10 Page
ZG It is not convenient to exercise signals
ZH Exercise had been completed
ZI I can receive but not transmit by Complements Table 1 Chapter 2 Section 10 Page 104
ZJ I can transmit but not receive by Complements Table 1 Chapter 2 Section 10 Page 104
ZK I cannot distinguish your signal Please repeat it by Complements Table 1 Chapter 2 Sec
tion 10 Page 104
ZL Your signal has been received but not understood
I cannot read your Complements Table 1 Chapter 2 Section 10 Page 104 YT
ZM You should send or speak more slowly
ZM 1 Shall I send or speak more slowly
ZN You should send each word or group twice
ZO You should stop sending
ZO 1 Shall I stop sending
REPEAT
ZP My last signal was incorrect I will repeat it correctly
ZQ Your signal appears incorrectly coded You should check and repeat the whole
ZR Repeat the signal now being made to me by vessel or coast station name or identity sig
CHAPTER 2
SECTION 9 INTERNATIONAL HEALTH REGULATIONS
Cross
Code Meaning
Reference
PRATIQUE MESSAGES
ZS My vessel is healthy and I request free pratique Q
I require health clearance QQ
ZT My Maritime Declaration of Health has negative answers to the six Health My Maritime Declaration of Health has a
positive answer to Health Health
Questions are indicated by complements 16
ZV I believe I have been in an infected area during the last thirty days
ZW I require Port Medical Officer
ZW 1 Port Medical Officer will be available at time You should make the appropriate pratique signal
ZY You have pratique
ZZ You should proceed to anchorage for health clearance at place indicated
ZZ 1 Where is the anchorage for health clearance
I have a doctor on board AL
Have you a doctor AM
By night a red light over a white light may be shown where it can best be seen by vessels requiring health clear
ance These lights should only be about 6 feet apart should be exhibited within the precincts of a port and should
be visible all around the horizon as nearly as
103
CHAPTER 2
SECTION 10 TABLES OF 1
1 Morse signaling by hand flags or arms
2 Loud hailer Morse signaling lamp
4 Sound 2
0 Water
1 Provisions
2 Fuel
3 Pumping equipment
4 Firefighting appliances
5 Medical assistance
6 Towing
7 Survival craft
8 Vessel to stand by
9 3
0 Direction unknown or calm
1 Northeast
2 East
3 Southeast
4 South
5 Southwest
6 West
7 Northwest
8 North
9 All directions or confused or
CHAPTER 3
CHAPTER 3
MEDICAL SIGNAL CODE
PAGE
SECTION 1 EXPLANATION AND INSTRUCTIONS 107
INSTRUCTIONS TO MASTERS 107
INSTRUCTIONS TO DOCTORS 107
EXAMPLES 108
CASE ONE 108
CASE TWO 108
SECTION 2 REQUEST FOR MEDICAL ASSISTANCE 109
INFORMATION 109
DESCRIPTION OF PATIENT 109
PREVIOUS HEALTH 110
LOCALIZATION OF SYMPTOMS DISEASES OR INJURIES 110
GENERAL SYMPTOMS 110
PARTICULAR SYMPTOMS 114
PROGRESS REPORT 123
SECTION 3 MEDICAL ADVICE 125
REQUEST FOR ADDITIONAL INFORMATION 125
DIAGNOSIS 125
SPECIAL TREATMENT 125
TREATMENT BY MEDICAMENTS 127
DIET 128
CHILDBIRTH 128
VACCINATION AGAINST SMALLPOX 129
GENERAL INSTRUCTIONS 129
SECTION 4 TABLES OF COMPLEMENTS 130
TABLE M1REGIONS OF THE BODY 130
TABLE M2LIST OF COMMON DISEASES 133
TABLE M3LIST OF MEDICAMENTS 134
CHAPTER 3
SECTION 1 EXPLANATION AND Medical advice should be sought and given in plain language whenever it is possible but if language difficulties are this
Code should be used
2 Even when plain language is used the text of the Code and the instructions should be followed as far as possible
3 Reference is made to the procedure signals C N or NO and RQ which when used after the main signal change
its meaning into affirmative negative and respectively See Chapter 1 Section 6 Paragraph 3j Page 11
Example
MFE N Bleeding is not severe
MFE RQ Is bleeding TO method of case The master should make a careful examination of the patient and should try to collect as far as possible
information covering
the following subjects
a Description of the patient Chapter 3 Section 2 Page 109
b Previous health Chapter 3 Section 2 Page 110
c Localization of symptoms diseases or injuries Chapter 3 Section 2 Page 110
d General symptoms Chapter 3 Section 2 Page 110
e Particular symptoms Chapter 3 Section 2 Page 114
f Diagnosis Chapter 3 Section 3 Page 125
2 Such information should be coded by choosing the appropriate groups from the corresponding sections of this chapter It
would help the recipients of the signal if the information is transmitted in the order stated in Paragraph 1
3 Chapter 3 Section 2 Page 109 contains signals which can be used ie with or without the description of the
case
4 After a reply from the doctor has been received and the instructions therein followed the master can give a progress report
by using signals from Chapter 3 Section 2 Page TO DOCTORS
1 Additional information can be requested by using Chapter 3 Section 3 Page 125
Example
MQB I cannot understand your signal please use standard method of case For diagnosis Chapter 3 Section 3 Page 125 should be used
Example
MQE 26 My probable diagnosis is cystitis
3 Prescribing should be limited to the List of Medicaments which comprises Table M3 in Chapter 3 Section 4 Pages 134
and 135 of the Code
4 For special treatment signals from Chapter 3 Section 3 Pages 125 through 127 should be used
Example
MRP 4 Apply icecold compress and renew every 4 hours
5 When prescribing a medicament Chapter 3 Section 3 page 127 three signals should be used as follows
a the first Chapter 3 Section 3 Page 127 and Table M3 in Chapter 3 Section 4 Pages 134 and 135 to signify the me
dicament itself
Chapter 3 Section 3 Page 125 Diagnosis can be used by both the master request for medical assistance
and the doctor medical advice
CHAPTER 3MEDICAL SIGNAL CODE
Example
MTD 32 You should give aspirin tablets
b the second Chapter 3 Section 3 Page 127 to signify the method of and dose
Example
MTI 2 You should give by mouth 2 c the third Chapter 3 Section 3 Page 127 to signify the frequency of the dose
Example
MTQ 8 You should repeat every 8 hours
6 The frequency of external applications is coded in Chapter 3 Section 3 Page 128
Example
MTU 4 You should apply every 4 hours
7 Advice concerning diet can be given by using signals from Chapter 3 Section 3 Page 128
Example
MUC Give water only in small an example two cases of request for assistance and the corresponding replies are drafted below
CASE ONE
Request for medical assistance
I have a male age 44 years Patient has been ill for 2 days Patient has suffered from bronchitis acute Onset was is delirious Patient has fits of
shivering Temperature taken in mouth is 40 Pulse rate per minute is 110 The rate of
breathing per minute is 30 Patient is in pain chest Part of the body affected is right chest Pain is increased on has severe cough Patient has
bloodstained sputum Patient has been given penicillin injection without effect Patient
has received treatment by medicaments in last 18 hours My probable diagnosis is advice
Your diagnosis is probably right You should continue giving penicillin injection You should repeat every 12 hours Put
patient to bed lying down at absolute rest Keep patient warm Give fluid diet milk fruit juice tea mineral water Give water
very freely Refer back to me in 24 hours or before if patient TWO
Request for medical assistance
I have a male aged 31 years Patient has been ill for 3 hours Patient has had no serious previous illness Pulse rate per
minute is 95 Pulse is weak Patient is sweating Patient is in pain in lumbar kidney region The part affected is left region Pain is severe Pain is
increased by hand pressure Bowels are for additional cannot make a diagnosis Please answer the following questions Temperature taken in the mouth is
number Pain radiates
to groin and testicle Patient has pain on passing water Urinary functions normal Vomiting is taken in mouth is 37 Pain radiates to groin and
testicle Patient has pain on passing water Patient is passing
small quantities of urine frequently Vomiting is absent Patient has advice
My probable diagnosis is kidney stone renal colic You should give morphine injection You should give by 15 milligrams Give water freely Apply hot
water bottle to lumbar kidney region Patient should be seen by doctor
when next in CHAPTER 3
SECTION 2 REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning
Reference
I request urgent medical advice
MAB I request you to make rendezvous in position I request you to arrange hospital I am indicate number hours from the nearest port
MAE I am converging on nearest port
MAF I am moving away from nearest port
I require medical assistance W
I have a doctor on board AL
Have you a doctor AM
I need a doctor AN
I need a doctor I have severe burns AN 1
I need a doctor I have radiation casualties AN 2
I require a helicopter urgently with a doctor BR 2
I require a helicopter urgently to pick up injuredsick person BR 3
Helicopter is coming to you now or at time indicated with a doctor BT 2
Helicopter is coming to you now or at time indicated to pick up injuredsick person BT 3
I have injuredsick person or number of persons indicated to be taken off urgently AQ
You should send a with a stretcher BS
A is coming to take injuredsick BU
You should send injuredsick persons to me AT
DESCRIPTION OF PATIENT
MAJ I have a male aged number years
MAK I have a female aged number years
MAL I have a female number months Patient has been ill for number days
MAN Patient has been ill for number hours
MAO General condition of the patient is good
MAP General condition of the patient is serious
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning Reference
MAQ General condition of the patient is unchanged
MAR General condition of the patient has worsened
MAS Patient has been given Table M3 in Chapter 3 Section 4 Pages 134 and 135 with effect
MAT Patient has been given Table M3 in Chapter 3 Section 4 Pages 134 and 135 without
effect
MAU Patient has received treatment by medicaments in last indicate number hours
PREVIOUS HEALTH
MBA Patient has suffered from Table M2 in Chapter 3 Section 4 Page 133
MBB Patient has had previous operation Table M2 in Chapter 3 Section 4 Page 133
MBC Patient has had no serious previous illness
MBD Patient has had no relevant previous injury
LOCALIZATION OF SYMPTOMS DISEASES OR INJURIES
MBE The whole body is affected
MBF The part of the body affected is Table M1 in Chapter 3 Section 4 Page 130
MBG The part of the body affected is right Table M1 in Chapter 3 Section 4 Page 130
MBH The part of the body affected is left Table M1 in Chapter 3 Section 4 Page 130
To be used when right and left side of the body or limb need to be GENERAL SYMPTOMS
MBP Onset was sudden
MBQ Onset was gradual
Temperature
MBR Temperature taken in mouth is number
MBS Temperature taken in rectum is number
MBT Temperature in the morning is number
MBU Temperature in the evening is SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning Reference
Temperature is rising
MBW Temperature is falling
Pulse
MBX The pulse rate per minute is The pulse rate is The pulse rate is rising
MCA The pulse rate is falling
MCB The pulse is weak
MCC The pulse is too weak to count
MCD The pulse is too rapid to count
The rate of breathing per minute is number in and out being counted as one breath
MCF The breathing is weak
MCG The breathing is The breathing is regular
MCI The breathing is The breathing is strenuous noisy
Sweating
MCL Patient is Patient has fits of shivering Patient has night sweats
MCO Patients skin is hot and dry
MCP Patient is cold and clammy
Mental State and Patient is Patient is semiconscious but can be roused
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning Reference
Mental State and MCU Patient is MCV Patient found MCW Patient appears to be in a state of shock
MCX Patient is delirious
MCY Patient has mental symptoms
MCZ Patient is paralyzed Table M1 in Chapter 3 Section 4 Page 130
MDC Patient is restless
MDD Patient is unable to sleep
Pain
MDF Patient is in pain Table M1 in Chapter 3 Section 4 Page 130
MDG Pain is a dull ache
MDJ Pain is slight
MDL Pain is severe
MDM Pain is MDN Pain is continuous
MDO Pain is increased by hand pressure
MDP Pain radiates to Table M1 in Chapter 3 Section 4 Page 130
MDQ Pain is increased on breathing
MDR Pain is increased by action of bowels
MDT Pain is increased on passing water
MDU Pain occurs after taking food
MDV Pain is relieved by taking food
MDW Pain has no relation to taking food
MDX Pain is relieved by heat
MDY Pain has ceased
Cough
MED Cough is present
MEF Cough is SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning Reference
Bowels
MEG Bowels are regular
MEJ Patient is constipated and bowels last opened indicate number of days
MEL Patient has diarrhea indicate number of times daily
Vomiting
MEM Vomiting is present
MEN Vomiting is absent
MEO Patient has nausea
Urine
MEP Urinary functions normal
MEQ Urinary functions abnormal
Bleeding
MER Bleeding is present Table M1 in Chapter 3 Section 4 Page 130
MET Bleeding is absent
Rash
MEU A rash is present Table M1 in Chapter 3 Section 4 Page 130
MEV A rash is absent
Swelling
MEW Patient has a swelling Table M1 in Chapter 3 Section 4 Page 130
MEX Swelling is hard
MEY Swelling is soft
MEZ Swelling is hot and red
MFA Swelling is painful on hand Swelling is Patient has an abscess Table M1 in Chapter 3 Section 4 Page 130
MFD Patient has a carbuncle Table M1 in Chapter 3 Section 4 Page 130
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning Reference
PARTICULAR SYMPTOMS
Accidents Injuries Fractures Suicide and Poisons
Bleeding is present Table M1 in Chapter 3 Section 4 Page 130 MER
MFE Bleeding is severe
MFF Bleeding is slight
MFG Bleeding has been stopped by pads and bandaging
MFH Bleeding has been stopped by tourniquet
MFI Bleeding has stopped
MFJ Bleeding cannot be stopped
MFK Patient has a superficial wound Table M1 in Chapter 3 Section 4 Page 130
MFL Patient has a deep wound Table M1 in Chapter 3 Section 4 Page 130
MFM Patient has penetrating wound Table M1 in Chapter 3 Section 4 Page 130
MFN Patient has a cleancut wound Table M1 in Chapter 3 Section 4 Page 130
MFO Patient has a wound with ragged edges Table M1 in Chapter 3 Section 4 Page 130
MFP Patient has a discharging wound Table M1 in Chapter 3 Section 4 Page 130
MFQ Patient has contusion bruising Table M1 in Chapter 3 Section 4 Page 130
MFR Wound is due to blow
MFS Wound is due to crushing
MFT Wound is due to explosion
MFU Wound is due to fall
MFV Wound is due to gunshot
MFW Patient has a foreign body in wound
MFX Patient is suffering from concussion
MFY Patient cannot move the arm Table M1 in Chapter 3 Section 4 Page 130
MFZ Patient cannot move the leg Table M1 in Chapter 3 Section 4 Page 130
MGA Patient has dislocation Table M1 in Chapter 3 Section 4 Page 130
MGB Patient has simple fracture Table M1 in Chapter 3 Section 4 Page 130
MGC Patient has compound fracture Table M1 in Chapter 3 Section 4 Page 130
MGD Patient has comminuted fracture Table M1 in Chapter 3 Section 4 Page 130
MGE Patient has attempted SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning Reference
Accidents Injuries Fractures Suicide and Poisons
MGF Patient has cut throat
MGG Patient has superficial burn Table M1 in Chapter 3 Section 4 Page 130
MGH Patient has severe burn Table M1 in Chapter 3 Section 4 Page 130
MGI Patient is suffering from noncorrosive poisoning no staining and burning of mouth and lips
MGJ Patient has swallowed corrosive staining and burning of mouth and lips
MGK Patient has swallowed unknown poison
MGL Patient has swallowed a foreign body
MGM Emetic has been given with good results
MGN Emetic has been given without good results
MGO No emetic has been given
MGP Patient has had corrosive thrown on him Table M1 in Chapter 3 Section 4 Page 130
MGQ Patient has inhaled poisonous gases vapors dust
MGR Patient is suffering from animal bite Table M1 in Chapter 3 Section 4 Page 130
MGS Patient is suffering from snake bite Table M1 in Chapter 3 Section 4 Page 130
MGT Patient is suffering from gangrene Table M1 in Chapter 3 Section 4 Page 130
Diseases of Nose and Throat
MGU Patient has nasal Patient has foreign body in nose
MHA Lips are swollen
MHB Tongue is dry
MHC Tongue is coated
MHD Tongue is glazed and red
MHF Tongue is swollen
MHG Patient has ulcer on tongue
MHJ Patient has ulcer in mouth
MHK Gums are sore and Throat is sore and red
MHM Throat has pinpoint white spots on tonsils
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning
Reference
Diseases of Nose and Throat
MHN Throat has gray white patches on tonsils
MHO Throat hurts and is swollen on one side
MHP Throat hurts and is swollen on both sides
MHQ Swallowing is painful
MHR Patient cannot swallow
MHT Patient has hoarseness of voice
Patient has swallowed a foreign body MGL
MHV Patient has severe toothache
Diseases of Respiratory System
MHY Patient has pain in chest on breathing Table M1 in Chapter 3 Section 4 Page 130
Breathing is wheezing MCG
MHZ Breathing is deep
MIA Patient has severe shortness of breath
MIB Patient has asthmatical attack
Cough is absent MEF
MIC Patient has severe cough
MID Cough is MIF Patient is coughing up blood
MIG Patient has no sputum
MIJ Patient has abundant sputum
MIK Sputum is offensive
MIL Patient has bloodstained sputum
MIM Patient has blueness of face
Diseases of the Digestive System
MIN Patient has tarry stool
MIO Patient has claycolored stool
Patient has diarrhea indicate number of times daily MEL
MIP Patient has diarrhea with frequent stools like rice SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning
Reference
Diseases of the Digestive System
MIQ Patient is passing blood with stools
MIR Patient is passing mucus with stools
Patient has nausea MEO
MIT Patient has persistent Patient has cramp pains and vomiting
Vomiting is present MEM
Vomiting is absent MEN
MIV Vomiting has stopped
MIW Vomiting is Vomit is streaked with blood
MIY Patient vomiting much blood
MIZ Vomit is dark like coffee Patient vomits any food and liquid given
MJB Amount of vomit is indicate in deciliters 1 deciliter equals onesixth of a pint
MJC Frequency of vomiting is indicate number daily
MJD Patient has Wind has not been passed per anus for indicate number of hours
MJF Wind is being passed per anus
MJG Abdomen is Abdominal wall is soft Abdominal wall is hard and rigid
MJJ Abdominal wall is tender Table M1 in Chapter 3 Section 4 Page 130
Patient is in pain Table M1 in Chapter 3 Section 4 Page 130 MDF
Patient has a swelling Table M1 in Chapter 3 Section 4 Page 130 MEW
MJK Hernia is present
MJM Hernia cannot be Hernia is painful and tender
MJO Patient has bleeding Hemorrhoids cannot be reduced put back in place
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning
Reference
Diseases of the Genitourinary System
Patient is in pain Table M1 in Chapter 3 Section 4 Page 130 MDF
MJS Patient has pain on passing water
MJT Patient has pain in penis at end of passing water
MJU Patient has pain spreading from abdomen to penis testicles or thigh
MJV Patient is unable to hold urine MJW Patient is unable to pass urine
MJX Patient is passing small quantities of urine frequently
MJY Amount of urine passed in 24 hours indicate number in deciliters 1 deciliter equals one
sixth of a pint
Urinary functions normal MEP
MKA Urine contains albumen
MKB Urine contains sugar
MKC Urine contains blood
MKD Urine is very dark brown
MKE Urine is offensive and may contain pus
MKF Penis is swollen
MKH Foreskin will not go back to normal position
MKI Patient has swelling of testicles
MKJ Shall I pass a catheter
MKK I have passed a catheter
MKL I am unable to pass a catheter
Diseases of the Nervous System and Mental Diseases
MKP Patient has headache Table M1 in Chapter 3 Section 4 Page 130
MKQ Headache is throbbing
MKR Headache is very severe
MKS Head cannot be moved forwards to touch chest
MKT Patient cannot feel pinprick Table M1 in Chapter 3 Section 4 Page 130
MKU Patient is unable to speak SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning
Reference
Diseases of the Nervous System and Mental Diseases
MKV Giddiness vertigo is present
Patient is paralyzed Table M1 in Chapter 3 Section 4 Page 130 MCZ
Patient is conscious MCR
Patient is semiconscious but can be roused MCT
Patient is unconscious MCU
MKW Pupils are equal in size
MKX Pupils are unequal in size
MKY Pupils do not contract in a bright light
MKZ Patient has no control over his bowels
MLA Patient has fits associated with rigidity of muscles and jerking of number of
fits per 24 hours
Patient has mental symptoms MCY
MLB Patient has Patient is depressed
Patient is delirious MCX
MLD Patient is Patient has attempted suicide MGE
MLE Patient has had much alcohol
MLF Patient has delirium tremens
MLG Patient has bedsores Table M1 in Chapter 3 Section 4 Page 130
Diseases of the Heart and Circulatory System
Patient is in pain Table M1 in Chapter 3 Section 4 Page 130 MDF
MLH Pain has been present for indicate number of Pain in chest is constricting in Pain is behind the breastbone
Pain radiates to Table M1 in Chapter 3 Section 4 Page 130 MDP
Patient has blueness of face MIM
MLK Patient has pallor
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning
Reference
Diseases of the Heart and Circulatory System
The rate of breathing per minute is number in and out being counted as one
breath MCE
The pulse is weak MCB
The pulse rate is irregular MBY
The pulse is too weak to count MCC
The pulse is too rapid to count MCD
MLL Breathing is difficult when lying down
MLM Swelling of legs that pits on pressure
MLN Patient has varicose ulcer
Infectious and Parasitic Diseases
MLR Rash has been present for indicate number of hours
MLS Rash first appeared on Table M1 in Chapter 3 Section 4 Page 130
MLT Rash is spreading to Table M1 in Chapter 3 Section 4 Page 130
MLU Rash is fading
MLV Rash is itchy
MLW Rash is not itchy
MLX Rash looks like general redness
MLY Rash looks like blotches
MLZ Rash looks like small blisters containing clear fluid
MMA Rash looks like larger blisters containing pus
MMB Rash is weeping oozing
MMC Rash looks like weals
MMD Rash consists of rosecolored spots that do not blench on pressure
MME Skin is yellow
Patient has an abscess Table M1 in Chapter 3 Section 4 Page 130 MFC
MMF Patient has buboes Table M1 in Chapter 3 Section 4 Page 130
MMJ Patient has been isolated
MMK Should patient be isolated
MML I have had indicate number similar SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning Reference
Infectious and Parasitic Diseases
Patient has diarrhea with frequent stools like rice water MIP
Patient has never been successfully vaccinated against smallpox MUT
Patient was last vaccinated date indicated MUU
Patient has vaccination marks MUV
Venereal Diseases See also Diseases of Genitourinary System
MMP Patient has discharge from penis
MMQ Patient has previous history of Patient has single hard sore on penis
MMS Patient has multiple sores on penis
Patient has buboes Table M1 in Chapter 3 Section 4 Page 130 MMF
MMT Patient has swollen glands in the groin
MMU End of penis is inflamed and swollen
Diseases of the Ear
Patient is in pain Table M1 in Chapter 3 Section 4 Page 130 MDF
MMW Patient has boil in ears
MMX Patient has discharge of blood from ears
MMY Patient has discharge of clear fluid from ears
MMZ Patient has discharge of pus from ears
MNA Patient has hearing Patient has foreign body in ear
Giddiness vertigo is present MKV
MNC Patient has constant noises in ears
Diseases of the Eye
Patient is in pain Table M1 in Chapter 3 Section 4 Page 130 MDF
MNG Patient has inflammation of eyes
MNH Patient has discharge from eyes
MNI Patient has foreign body embedded in the pupil area of the eye
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning
Reference
Diseases of the Eye
MNJ Eyelids are swollen
MNK Patient cannot open eyes raise eyelids
MNL Patient has foreign body embedded in the white of the eye
MNM Patient has double vision when looking at objects with both eyes open
MNN Patient has sudden blindness in one eye
MNO Patient has sudden blindness in both eyes
Pupils are equal in size MKW
Pupils are unequal in size MKX
Pupils do not contract in a bright light MKY
Patient has a penetrating wound Table M1 in Chapter 3 Section 4 Page 130 MFM
MNP Eyeball is yellow in color
Diseases of the Skin
See Infectious and Parasitic Diseases in Chapter 3 Section 2 Page 120
Diseases of Muscles and Joints
MNT Patient has pain in muscles of Table M1 in Chapter 3 Section 4 Page 130
MNU Patient has pain in joints Table M1 in Chapter 3 Section 4 Page 130
MNV Patient has redness and swelling of joints Table M1 in Chapter 3 Section 4 Page 130
MNW There is history of recent injury
MNX There is no history of injury
Miscellaneous Illnesses
Patient has had much alcohol MLE
MOA Patient is suffering from heat exhaustion
MOB Patient is suffering from heat stroke
MOC Patient is suffering from MOD Patient is suffering from exposure in length of exposure number hours
MOE Patient is suffering from frostbite Table M1 in Chapter 3 Section 4 Page 130
MOF Patient has been exposed to radioactive SECTION 2REQUEST FOR MEDICAL ASSISTANCE
Cross
Code Meaning Reference
I have a patient in childbirth aged number years
MOL Patient states she has had number Patient states child is due in number weeks
MON Pains began number hours ago
MOO Pains are feeble and produce no effect
MOP Pains are strong and Pains are occurring every number minutes
MOR The bag of membranes broke number hours ago
MOS There is severe bleeding from the womb
MOT The head is coming first
MOU The buttocks are coming first
MOV A foot has appeared first
MOW An arm has appeared first
MOX The child has been born
MOY The child will not breathe
MOZ The placenta has been passed
MPA The placenta has not been passed
MPB I have a nonpregnant woman who is bleeding from the womb
PROGRESS REPORT
MPE I am carrying out prescribed Patient is Patient is not Patient is relieved of pain
MPI Patient still has pain
MPJ Patient is Patient is calm
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning MPL Symptoms have cleared
MPM Symptoms have not cleared
MPN Symptoms have increased
MPO Symptoms have decreased
MPP Treatment has been effective
MPQ Treatment has been MPR Patient has CHAPTER 3
SECTION 3 MEDICAL ADVICE
Cross
Code Meaning Reference
REQUEST FOR ADDITIONAL I cannot understand your signal please use standard method of case Please answer the following
My probable diagnosis is Table M2 in Chapter 3 Section 4 Page 133
MQF My alternative diagnosis is Table M2 in Chapter 3 Section 4 Page 133
MQG My probable diagnosis is infection or inflammation Table M1 in Chapter 3 Section 4
Page 130
MQH My probable diagnosis is perforation of Table M1 in Chapter 3 Section 4 Page 130
MQI My probable diagnosis is tumor of Table M1 in Chapter 3 Section 4 Page 130
MQJ My probable diagnosis is obstruction of Table M1 in Chapter 3 Section 4 Page 130
MQK My probable diagnosis is hemorrhage of Table M1 in Chapter 3 Section 4 Page 130
MQL My probable diagnosis is foreign body in Table M1 in Chapter 3 Section 4 Page 130
MQM My probable diagnosis is fracture of Table M1 in Chapter 3 Section 4 Page 130
MQN My probable diagnosis is dislocation of Table M1 in Chapter 3 Section 4 Page 130
MQO My probable diagnosis is sprain of Table M1 in Chapter 3 Section 4 Page 130
MQP I cannot make a Your diagnosis is probably right
MQU I am not sure about your diagnosis
SPECIAL You should refer to your International Ships Medical Guide if available or its You should follow treatment in your own medical guide
MRK You should follow the instructions for this procedure outlined in your own medical guide
MRL Commence artificial respiration Pass catheter into bladder
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning MRN Pass catheter again after number hours
MRO Pass catheter and retain it in bladder
MRP Apply icecold compress and renew every number hours
MRQ Apply hot compress and renew every number hours
MRR Apply hotwater bottle to Table M1 in Chapter 3 Section 4 Page 130
MRS Insert ear drops number times daily
MRT Insert antiseptic eye drops number times daily
MRU Insert anesthetic eye drops number times daily
MRV Bathe eye frequently with hot water
MRW Give frequent gargles one teaspoonful of salt in a tumblerful of water
MRX Give enema
MRY Do not give enema or laxative
MRZ Was the result of the enema MSA Give rectal saline slowly to replace fluid loss
MSB Give subcutaneous saline to replace fluid loss
MSC Apply wellpadded splints to immobilize limb Watch circulation by inspection of color of
fingers or toes
MSD Apply cotton wool to armpit and bandage arm to side
MSF Apply a sling andor rest the part
MSG Give light movements and massage daily
MSJ Place patient in hot bath
MSK To induce sleep give two sedative tablets
MSL Reduce temperature of patient as indicated in general nursing chapter of Medical Guide
MSM The swelling should be incised and drained
MSN Dress wound with sterile gauze cotton wool and bandage
MSO Dress wound with sterile gauze cotton wool and apply wellpadded splint
MSP Apply burn and wound dressing and bandage lightly
MSQ Dress wound and bring edges together with adhesive plaster
MSR The wound should be SECTION 3MEDICAL ADVICE
Cross
Code Meaning The wound should not be Stop bleeding by
applying more cotton wool firm bandaging and elevation of the limb
MSV Stop bleeding by manual Apply tourniquet for not more than fifteen minutes
MSX Induce vomiting by giving an emetic
MSY You should pass a stomach tube
MSZ Do not try to empty stomach by any method
TREATMENT BY MEDICAMENTS
You should give Table M3 in Chapter 3 Section 4 Page 134 and 135
MTE You must not give Table M3 in Chapter 3 Section 4 Page 134 and 135
Method of and Dose
MTF You should give one tablespoon 15 ml or 12 oz
MTG You should give one 75 ml or 14 oz
MTH You should give one teaspoonful 4 ml or 1 drachm
MTI You should give by mouth number You should give a tumblerful of water with each dose
MTK You should give by intramuscular injection number You should give by subcutaneous injection number You should give by
intramuscular injection number You should give by subcutaneous injection number ampoules
Frequency of Dose
MTO You should give once only
MTP You should repeat after number hours
MTQ You should repeat every number hours
MTR You should continue for number hours
CHAPTER 3MEDICAL SIGNAL CODE
Cross
Code Meaning
Reference
Frequency of External Application
MTT You should apply once only
MTU You should apply every number hours
MTV You should cease to apply
MTW You should apply for number minutes
DIET
MUA Give nothing by mouth
MUB Give water very freely
MUC Give water only in small quantities
MUD Give water only as much as possible without causing the patient to vomit
MUE Give ice to suck
MUF Give fluid diet milk fruit juices tea mineral water
MUG Give light diet such as vegetable soup steamed fish stewed fruit milk puddings or equivalent
MUH Give normal diet as tolerated
CHILDBIRTH
MUI Has she had previous children
MUJ How many months pregnant is she
MUK When did labor pains start
Give enema MRX
MUL Encourage her to rest between pains
MUM Encourage her to strain down during pains
MUN What is the frequency of pains indicate in minutes
To induce sleep give two sedative tablets MSK
MUO Patient should strain down and you exert steady but gentle pressure on lower part of the abdo
men but not on the womb to help expulsion of the placenta
MUP You should apply tight wide binder around lower part of abdomen and hips
MUQ You should apply artificial respiration gently by mouth technique on SECTION 3MEDICAL ADVICE
Cross
Code Meaning Reference
VACCINATION AGAINST SMALLPOX
MUR Has the patient been successfully Has the patient been vaccinated during the past three years
MUT Patient has never been successfully vaccinated against Patient was last vaccinated indicate date
MUV Patient has vaccination marks
GENERAL I consider the case serious and urgent
MVB I do not consider the case serious or urgent
MVC Put patient to bed lying down at absolute rest
MVD Put patient to bed sitting up
MVE Raise head of bed
MVF Raise foot of bed
MVG Keep patient warm
MVH Keep patient cool
MVI You should continue your local You should continue your special You should continue giving Table M3 in Chapter 3 Section 4 Pages 134
and 135
MVL You should suspend your local You should suspend your special You should cease giving Table M3 in Chapter 3 Section 4 Pages 134 and
MVO You should isolate the patient and disinfect his cabin
MVP You should land your patient at the earliest Patient should be seen by a doctor when next in port
MVR I will arrange for hospital I think I should come on board and examine the case
MVT No treatment advised
MVU Refer back to me in number hours or before if patient worsens
CHAPTER 3
SECTION 4 TABLES OF COMPLEMENTS
TABLE M1REGIONS OF THE BODY
Side of body or limb affected should be clearly left
FIGURE 1 Front
1 Frontal region of head 13 Arm upper 25 Scrotum
2 Side of head 14 Forearm 26 Testicles
3 Top of head 15 Wrist 27 Penis
4 Face 16 Palm of hand 28 Upper thigh
5 Jaw 17 Fingers 29 Middle thigh
6 Neck front 18 Thumb 30 Lower thigh
7 Shoulder 19 Central upper abdomen 31 Knee
8 Clavicle 20 Central lower abdomen 32 Patella
9 Chest 21 Upper abdomen 33 Front of leg
10 Chest mid 22 Lower abdomen 34 Ankle
11 Heart 23 Lateral abdomen 35 Foot
12 Armpit 24 Groin 36 Toes
FIGURE 2 Back
37 Back of head 44 Back of hand 51 Buttock
38 Back of neck 45 Lower chest region 52 Anus
39 Back of shoulder 46 Spinal column upper 53 Back of thigh
40 Scapula region 47 Spinal column middle 54 Back of knee
41 Elbow 48 Spinal column lower 55 Calf
42 Back upper arm 49 Lumbar kidney region 56 Heel
43 Back lower arm 50 Sacral region
OTHER ORGANS OF THE BODY
57 Artery 69 Lip lower 81 Tongue
58 Bladder 70 Lip upper 82 Tonsils
59 Brain 71 Liver 83 Tooth teeth
60 Breast 72 Lungs 84 Urethra
61 Ears 73 Mouth 85 Uterus womb
62 Eyes 74 Nose 86 Vein
63 Eyelids 75 Pancreas 87 Voice box larynx
64 Gall bladder 76 Prostate 88 Whole abdomen
65 Gullet esophagus 77 Ribs 89 Whole arm
66 Gums 78 Spleen 90 Whole back
67 Intestine 79 Stomach 91 Whole chest
68 Kidney 80 Throat 92 Whole leg
Indicate side as 4TABLES OF COMPLEMENTS
FIGURE 1
CHAPTER 3MEDICAL SIGNAL CODE
FIGURE 2
SECTION 4TABLES OF COMPLEMENTS
TABLE M2LIST OF COMMON DISEASES
1 Abscess 32 Duodenal ulcer 64 Phlebitis
2 Alcoholism 33 Eczema 65 Piles
3 Allergic reaction 34 Erysipelas 66 Plague
4 Amoebic dysentery 35 Fits 67 Pleurisy
5 Angina pectoris 36 Gangrene 68 Pneumonia
6 Anthrax 37 Gastric ulcer 69 Poisoning Apoplexy stroke 38 70
Poisoning Appendicitis 39 Gonorrhea 71 Poisoning Asthma 40 Gout
72 Poisoning methyl alcohol
10 Bacillary dysentery 41 Heat cramps 73 Poisoning gases
11 Boils 42 Heat exhaustion 74 Bronchitis acute 43 Heat stroke
75 Prolapsed Bronchitis chronic 44 Hepatitis disc slipped disc
14 Brucellosis 45 Hernia 76 Pulmonary Carbuncle 46 Hernia irreducible
77 Quinsy
16 Cellulitis 47 Hernia 78 Chancroid 48 Immersion foot 79
Rheumatic fever
18 Chicken pox 49 Impetigo 80 Scarlet fever
19 Cholera 50 Insulin overdose 81 Sciatica
20 Cirrhosis of the liver 51 Indigestion 82 Shingles herpes zoster
21 Concussion 52 Influenza 83 Sinusitis
22 Compression of brain 53 Intestinal obstruction 84 Shock
23 Congestive heart failure 54 Kidney stone renal colic 85 Smallpox
24 Constipation 55 Laryngitis 86 Syphilis
25 Coronary thrombosis 56 Malaria 87 Tetanus
26 Cystitis bladder 57 Measles 88 Tonsillitis
inflammation 58 Meningitis 89 Typhoid
27 Dengue 59 Mental illness 90 Typhus
28 Diabetes 60 Migraine 91 Diabetic coma 61 Mumps
92 Urticaria nettle rash
30 Diptheria 62 Orchitis 93 Whooping cough
31 Drug reaction 63 Peritonitis 94 Yellow fever
CHAPTER 3MEDICAL SIGNAL CODE
TABLE M3LIST OF MEDICAMENTS
FOR EXTERNAL USE
1 Auristillae Glyceris 7 Naristillae Ephedrine
Glycerin ear drops Norephedrine hydrochloride drops
EAR DROPS NASAL DROPS
2 Guttae Sulfacetamidi 8 Paraffinum Molle Flavum
Sulfacetamide eye drops Yellow soft paraffin
ANTISEPTIC EYE DROPS SOFT PARAFFIN
3 Guttae Tetracainae 9 Paraffinum Molle Flavum Carbasi Absorbentis
Tetracaine eye drops Tulle gras dressing Paraffin gauze
ANAESTHETIC EYE DROPS BURNWOUND DRESSING
4 Linimentum Methylis Salicylatis 10 Unguentum Bacitracini
Methyl salicylate liniment Bacitracin ointment
SALICYLATE LINIMENT ANTIBIOTIC OINTMENT
5 Lotio Calaminae 11 Unguentum Benzocaini Compositum
Calamine Lotion Compund benzocaine ointment
CALAMINE LOTION PILE OINTMENT
6 Lotio Cetrimidi 12 Unguentum Xylocaini Cetrimide lotion
Mylocaine ointment
ANTISEPTIC LOTION LOCAL ANAESTHETIC OINTMENT
FOR INTERNAL USE
Allergic Conditions PENICILLIN TABLETS
13 Compressi Promethazini Hydrochloridi 125 mg per tablet
Promethazine hydrochloride tablets
ANTIHISTAMINE TABLETS 17 Compressi 25 mg per tablet
Sulfadimidine tablets
SULFONAMIDE TABLETS
14 Injectic Adrenalini 500 mg per tablet
Adrenaline injection
ADRENALINE 1 mg in Ampins 18 Injectio
Procaine penicillin G
CAUTION THIS INJECTION NO 14 TO BE USED ONLY PENICILLIN INJECTION
ON MEDICAL ADVICE BY RADIO EXCEPT IN 600000 units per ampoule
CASE OF ANAPHYLACTIC SHOCK DUE TO
PENICILLIN INJECTION 19 Injectio Streptomycini Sulfatis
Streptomycin sulfate injection
Antibiotics STREPTOMYCIN INJECTION
15 Capsulae Tetracyclini Hydrochloridi 1000 mg per ampoule
Tetracycline hydrochloride capsules
TETRACYCLINE CAPSULES
250 mg per capsule 20 Injectio Tetracyclini
Tetracycline 16 Compressi TETRACYCLINE INJECTION
100 mg per ampoule
Preparations listed may have been substituted by equivalent preparations in the ships medicine chest For the sake
of uniformity medicaments are indicated in the first place by their Latin denominations so that a correct transla
tion can be found in each SECTION 4TABLES OF COMPLEMENTS
Asthma Counpound Colocynth and Jalap tablets
21 Compressi Aminophyllini VEGETABLE LAXATIVE TABLETS
Aminophylline tablets
ASTHMA RELIEF TABLETS 30 Magnesii Hydroxidum
300 mg per tablet Magnesium hydroxide mixture
LIQUID of THIS TABLET NO 21 TO BE USED ONLY
ON MEDICAL ADVICE BY RADIO Malaria
31 Compressi Chloroquini Sulfatis
22 Compressi Ephedrini Hydrochloridi Chloroquine sulfate tablets
Ephedrine Hydrochloride tablets MALARIA TABLETS
EPHEDRINE TABLETS 200 mg per tablet
30 mg per tablet
Pain
23 Tinctura Benzoini Composita 32 Compressi Acidi Tincture of benzoin compound acid
tablets
INHALATION MIXTURE ASPIRIN TABLETS
300 mg per tablet
Cough
24 Compressi Codeini Phosphatis 33 Injectio Morphini
Codein phosphate tablets Morphine sulfate injection
CODEIN TABLETS MORPHINE INJECTION
15 mg per tablet 15 mg per ampoule
25 Linctus Scillae Opiata Sedation
Linctus of squill opiate 34 Compressi COUGH LINCTUS Butobarbitone
tablets
SEDATIVE TABLETS
Diarrhea 100 mg per tablet
26 Mistura Kaolini et Morphinae
Kaolin and morphine mixture 35 Compressi DIARRHEA MIXTURE tablets
TABLETS
Heart 30 mg per tablet
27 Compressi Glycerylis Trinitratis
Glycerin Trinitrate tablets 36 Compressi HEART TABLETS hydrochloride
tablets
05 mg per tablet TRANQUILLIZER TABLETS LARGACTIL
50 mg per tablet
NOTE For congestive heart failure the following prepara
tions are available on board ship but they should be CAUTION THIS TABLET NO 36 TO BE USED ONLY
used only on medical advice transmitted in plain lan ON MEDICAL ADVICE BY RADIO
guage and not by Code
Salt Depletion or Heat Cramps
Compressi or equiva 37 Compressi Natrii Chloridi Solv
lent 500 mg per tablet Sodium chloride tablets
Compressi Digoxin Digoxin tablets or equivalent SALT TABLETS
025 mg per tablet 500 mg per tablet
Indigestion Compressi Magnesii Trisilicas 38 Compressi Hyoscini Hydrobromidi
Magnesium trisilicate Hysocine Hydrobromide tablets
STOMACH TABLETS SEASICKNESS TABLETS
03 mg per tablet
Laxatives
29 Compressi Colocynthidis et Jalapae 135
CHAPTER 4
CHAPTER 4
DISTRESS AND LIFESAVING SIGNALS AND
PROCEDURES
PAGE
SECTION 1 DISTRESS SIGNALS 139
SECTION 2 TABLE OF LIFESAVING SIGNALS 140
SECTION 3 PROCEDURES 147
CHAPTER 4
SECTION 1 DISTRESS SIGNALS
PRESCRIBED BY THE INTERNATIONAL REGULATIONS FOR PREVENTING
COLLISIONS AT SEA 1972
To be used or displayed either together or separately by a vessel or seaplane on the water in distress requiring assistance from
other vessels or from the shore
1 A gun or other explosive signal fire at intervals of about a minute
2 A continuous sounding with any fogsignaling apparatus
3 Rockets or shells throwing red stars fired one at a time at short intervals
4 A signal made by or by any other signaling method consisting of the group SOS in the
Morse Code
5 A signal sent by consisting of the spoken word MAYDAY
6 The International Code Signal of distress indicated by NC
7 A signal consisting of a square flag having above or below it a ball or anything resembling a ball
8 Flames on the vessel as from a burning tar barrel oil barrel etc
9 A rocket parachute flare or a hand flare showing a red light
10 A smoke signal giving off a volume of smoke
11 Slowly and repeatedly raising and lowering arms outstretched to each side
12 The alarm signal
13 The alarm signal
14 Signals transmitted by emergency a Vessels in distress may use the alarm signal or the alarm signal to secure attention
to distress calls and messages The alarm signal which is designed to actuate the auto
alarms of vessels so fitted consists of a series of twelve dashes sent in 1 minute the duration of each dash being 4 sec
onds and the duration of the interval between 2 consecutive dashes being 1 second The alarm signal con
sists of 2 tones transmitted alternately over periods of from 30 seconds to 1 minute
bThe use of any of the foregoing signals except for the purpose of indicating that a vessel or seaplane is in distress
and the use of any signals which may be confused with any of the above signals is prohibited
cAttention is drawn to the relevant sections of the Merchant Ship Search and Rescue Manual and the following signals
i a piece of canvas with either a black square and circle or other appropriate symbol for identi
fication from the air
ii a dye marker
A series of twelve four second dashes at intervals of one second
Two audio tones transmitted alternately at frequency of 2200 Hz and 1300 Hz for a duration of 30 seconds to one
minute
Either the signal described in above or a series of single tones at a frequency of 1300 Hz
CHAPTER 4
SECTION 2 TABLE OF LIFESAVING SIGNALS
I LANDING SIGNALS FOR THE GUIDANCE OF SMALL BOATS WITH CREWS OR
PERSONS IN DISTRESS
MANUAL SIGNALS LIGHT SIGNALS OTHER SIGNALS Day
Signals
or code letter K given by light or
Vertical motion of a white flag or of the or firing of a green star signal soundsignal apparatus
arms
This is the best place to land
Night
Signals
or code letter K given by light or
Vertical motion of a white light or flare or firing of a green star signal soundsignal apparatus
A range indication of direction may be given by placing a steady white light or flare at a lower level and in line with the observer
Signals
or code letter S given by light or
Horizontal motion of a white flag or of or firing of a red star signal soundsignal apparatus
the arms extended horizontally Landing here
highly danger
Night
Signals
or code letter S given by light or
Horizontal motion of a light or flare or firing of a red star signal soundsignal apparatus
1 or signalling the code letter S
followed by the code letter R if
a better landing place for the craft in
distress is located more to the right
Day 1 Horizontal motion of a white flag fol in the direction of approach
Signals lowed by 2 or signaling the code letter S
2 the placing of the white flag in the followed by the code letter L
1 or firing of a red star signal verti if a better landing place for the craft
ground and cally and
3 by the carrying of another white flag in in distress is located more to the left
2 a white star signal in the direction in the direction of approach
the direction to be indicated towards the better landing place Landing here
highly danger
ous A more favorable loca
tion for landing is in the
1 or signalling the code letter S direction indicated
followed by the code letter R if
a better landing place for the craft in
distress is located more to the right
Night 1 Horizontal motion of a white in the direction of approach
Signals light or flare 2 or signaling the code letter S
2 followed by the placing of the white followed by the code letter L
1 or firing of a red star signal verti if a better landing place for the craft
light or flare on the ground and cally and a
3 the carrying of another white light or in distress is located more to the left
2 white star signal in the direction in the direction of approach
flare in the direction to be indicated towards the better landing SECTION 2TABLE OF LIFESAVING
SIGNALS
II SIGNALS TO BE EMPLOYED IN CONNECTION WITH THE USE OF SHORE
LIFESAVING APPARATUS
MANUAL SIGNALS LIGHT SIGNALS OTHER SIGNALS
In general affirmative
Vertical motion of a white flag or firing of a green star signal Specifically rocket line is
or of the arms held tail block is made fast
hawser is made fast
man is in the breeches buoy
haul Vertical motion of a white light
or firing of a green star signal
or Horizontal motion of a white or firing of a red star signal
flag or of the arms extended
In general negative
horizontally
Specifically slack away
avast Horizontal motion of a white or firing of a red star signal
light or flare
III REPLIES FROM LIFESAVING STATIONS OR MARITIME RESCUE UNITS
TO DISTRESS SIGNALS MADE BY A SHIP OR or combined light and sound
signal consist
ing of 3 single signals which
Orange smoke signal You are seen assistance will
are fired at intervals of approxi
be given as soon as possible
mately one minute
Repetition of such signal shall
have the same White star rocket consisting of
3 single signals which are fired
at intervals of one minute
If necessary the day signals may be given at night or the night signals by day
CHAPTER 4DISTRESS AND LIFESAVING SIGNALS AND IV VISUAL SIGNALS
Signals used by aircraft engaged in search and rescue operations to direct ships towards an aircraft ship or person in distress
PROCEDURES PERFORMED IN SEQUENCE BY AN AIRCRAFT
The aircraft is directing a vessel
towards an aircraft or vessel in
distress
Repetition of such signals shall
1 CIRCLE the vessel at least once 2 CROSS the vessels projected 3 HEAD in the direction in which have the same meaning
course close AHEAD at a low alti the vessel is to be directed
tude while ROCKING the wings
See Note
4 CROSS the vessels wake close ASTERN at low altitude while ROCKING the wings See Note
The assistance of the vessel is no
longer required
Repetition of such signals shall
have the same meaning
NOTE Opening and closing the throttle or changing the propeller pitch may also be practiced as an alternative means
of attracting attention to that of rocking the wings However this form of sound signal may be less effective than the
visual signal of rocking the wings owing to high noise level on board the vessel
Signals used by a vessel in response to an aircraft engaged in search and rescue operations
Acknowledges receipt of air
crafts signal
Hoist Code and Answering pen Change the heading to the required Flash Morse Code signal T by sig
dant Close up or direction or nal lamp
Indicates inability to comply
Hoist international flag N Flash Morse Code signal N by sig
NOVEMBER or nal SECTION 2TABLE OF
LIFESAVING SIGNALS
V VISUAL from surface craft or survivors to an aircraft
Use International Code of Signals Use the following visual
or plain language by use of a signals by displaying the appropriate
torch signalling lamps or signal signal on the deck or on the
International Code of ICAO visual sym
Signals bols
Require assistance V V
Require medical assistance W X
No or negative N N
Yes or affirmative C Y
Proceeding in this direction
ICAO annex 12 Search and rescue
Reply from an aircraft observing the above signals from surface craft or survivors
Use any other suitable Message understood
signal
Flash the landing lights
Rock the wings during or navigation lights on Flash Morse Code sig
Drop a message or daylight or and off twice during nal T or R by light
hours of darkness or or
Use any other suitable Message not under
signal stood repeat
Fly straight and level Flash Morse Code Sig
without rocking wings nal RPT by light or
CHAPTER 4DISTRESS AND LIFESAVING SIGNALS AND VI SIGNALS TO SURVIVORS
Procedures performed by an aircraft Drop
The aircraft wishes to
equipment suitable for
Drop a message or inform or instruct sur
establishing direct con
vivors
tact
High visibility colored streamer
Signals used by survivors in response to a message dropped by an aircraft Flash Morse Code sig
Dropped messages is
Use any other suitable
nal T or R by light understood by the
signal
or survivors
Dropped messages is
not understood by the
Flash Morse Code signal RPT by light SECTION 2TABLE OF LIFESAVING SIGNALS
CONFLICT AND PERMANENT OF RESCUE CRAFT
Shape color and positioning of emblem for medical transports
1 The following emblems can be used separately or together to show that a vessel is protected as a medical transport under the
Geneva The emblem positioned on the vessels sides bow stern and deck shall be painted dark red on a white background
a On the vessels sides the emblem shall extend from the waterline to the top of the ships hull
b The emblems on the vessels bow and stern must if necessary be painted on a wooden structure so as to be clearly visible
to other vessels ahead or astern
c The deck emblem must be as clear of the vessels equipment as possible to be clearly visible from aircraft
3 In order to provide the desired contrast for infrared film or instruments the red emblem must be painted on top of a black
primer paint
4 Emblems may also be made of materials which make them recognizable by technical means of At night and in restricted visibility the emblems shall be
illuminated or lit
2 At night and in restricted visibility all deck and overside lights must be fully lit to indicate that the vessel is engaged in med
ical equipment
1 Subject to the instructions of the competent authority medical and religious personnel carrying out their duties in the battle
area shall as far as possible wear headgear and clothing bearing the distinctive blue light for medical transports
1 A vessel engaged in medical operations shall exhibit one or more allaround flashing blue lights of the color prescribed in
paragraph 4
2 The visibility of the lights shall be as high as possible and not less than 3 nautical miles in accordance with Annex 1 to Regulations for
Preventing Collisions at Sea 1972
3 The light or lights shall be exhibited as high above the hull as practical and in such a way that at least one light shall be visible
from any direction
4 The recommended blue color is obtained by using as trichromatic green boundary y 00650805x
white boundary y 0400x
purple boundary x The frequency of the flashing light shall be between 60 and 100 flashes per minute
Radar It should be possible for medical transports to be identified by other vessels equipped with radar by signals from a radar tran
In accordance with Article 27 of the Second Geneva Convention of 12 August 1949 this chapter also applies to
coastal rescue craft
CHAPTER 4DISTRESS AND LIFESAVING SIGNALS AND fitted on the medical transport
2 The signal from the medical transport transponder shall consist of the group YYY in accordance with article 40 of the followed by the call sign or
other recognized means of acoustic signals
1 It should be possible for medical transports to be identified by submarines by appropriate underwater signals transmitted by
the medical The underwater signal shall consist of the call sign of the ship preceded by the single group YYY transmitted in Morse on acoustic
frequency eg 5 kHz
Rescue craft carried by medical transports
1 Every rescue craft should be equipped with a mast on which a Red Cross flag measuring about 2 x 2 meters can be blue light for medical aircraft
1 The light signal consisting of a flashing blue light is established for the use of medical aircraft to signal their identity No
other aircraft shall use this signal The recommended flashing rate of the blue light is between sixty and one hundred flashes
per minute
2 Medical aircraft should be equipped with such lights as may be necessary to make the light signal visible in as many directions
as CHAPTER 4
SECTION 3 PROCEDURES
RECEPTION OF SAFETY MESSAGES
Any message which you hear prefixed by one of the following words concerns SAFETY
MAYDAY Indicates that a ship aircraft or other vehicle is threatened by grave and
Distress imminent danger and requests immediate assistance
PAN Indicates that the calling station has a very urgent message to transmit con
Urgency cerning the safety of a ship aircraft or other vehicle or the safety of a person
SECURITE Indicates that the station is about to transmit a message concerning the safety
Safety of navigation or giving important warnings
If you hear these words pay particular attention to the message and call the master or the officer on watch
DISTRESS TRANSMITTING PROCEDURES
To be used only if IMMEDIATE ASSISTANCE is required
USE PLAIN LANGUAGE WHENEVER POSSIBLE If language difficulties are likely to arise use Tables 2 and 3 on Page
149 sending the word INTERCO to indicate that the message will be in the International Code of Signals
Call out letters as in Table 1 on Page 148 Call out numbers figure by figure as in Table 1
To indicate DISTRESS
1 If possible transmit the ALARM SIGNAL ie twotone signal for 30 seconds to one minute but do not delay the message
if there is insufficient time in which to transmit the Alarm Signal
2 Send the following DISTRESS CALL
Mayday Mayday Mayday This is name or call sign of ship spoken three times
3 Then send the DISTRESS MESSAGE composed of
Mayday followed by the name or call sign of of ship
Nature of if necessary transmit the nature of the aid required and any other information which will help the rescue
EXAMPLES OF DISTRESS PROCEDURE
1 Where possible transmit ALARM SIGNAL followed by spoken words Mayday Mayday Mayday This is name of ship
spoken three times or call sign of ship spelled three times using TABLE 1 on Page 148 Mayday name or call sign of 54 25 North 016 33 West I am on
fire and require immediate Where possible transmit ALARM SIGNAL followed by spoken words Mayday Mayday Mayday name of ship spoken
three times or call sign of ship spelled three times using TABLE 1 Mayday name or call sign of ship Interco Alfa Nadaz
ero Unaone Pantafive Ushant Romeo Kartefour Nadazero Delta Xray Ship in Distress Position 015 Degrees Ushant 40
miles I am sinking
3 Where possible transmit ALARM SIGNAL followed by spoken words Mayday Mayday Mayday name of ship spoken
three times or call sign of ship spelled three times using TABLE 1 Mayday name or call sign of ship Interco Lima Pan
tafive Kartefour Bissotwo Pantafive November Golf Nadazero Unaone Soxisix Terrathree Terrathree Whiskey Charlie Ship in Distress Position Latitude 54
25 North Longitude 016 33 West I require immediate assistance I am on fire
CHAPTER 4DISTRESS AND LIFESAVING SIGNALS AND TABLE 1
PHONETIC ALPHABET AND FIGURE SPELLING TABLES
May be used when transmitting plain language or code
Letter Word Pronounced as Letter Word Pronounced as
A Alfa AL FAH N November NO VEM BER
B Bravo BRAH VOH O Oscar OSS CAH
C Charlie CHAR LEE or P Papa PAH PAH
SHAR LEE Q Quebec KEH BECK
D Delta DELL TAH R Romeo ROW ME OH
E Echo ECK OH S Sierra SEE AIR RAH
F Foxtrot FOKS TROT T Tango TANG GO
G Golf GOLF U Uniform YOU NEE FORM or
H Hotel HOH TELL OO NEE FORM
I India IN DEE AH V Victor VIK TAH
J Juliett JEW LEE ETT W Whiskey WISS KEY
K Kilo KEY LOH X Xray ECKS RAY
L Lima LEE MAH Y Yankee YANG KEY
M Mike MIKE Z Zulu ZOO LOO
NOTE The syllables to be emphasized are boldfaced
Figure or Figure or
Mark to be Word Pronounced as Mark to be Word Pronounced as
Transmitted Transmitted
0 NADAZERO 6 SOXISIX SOKSEESIX
1 UNAONE OONAHWUN 7 SETTESEVEN SAYTAY
SEVEN
2 BISSOTWO BEESSOHTOO 8 OKTOEIGHT OKTOHAIT
3 TERRATHREE TAYRAHTREE 9 NOVENINE NOVAY
NINER
4 KARTEFOUR KARTAYFOWER Decimal DECIMAL DAYSEEMAL
point
5 PANTAFIVE PANTAHFIVE Full stop STOP STOP
NOTE Each syllable should be equally SECTION TABLE 2
Position in Code
1 By Bearing and Distance from a Landmark
Code letter A Alfa followed by a threefigure group for ships
TRUE bearing from landmark
Name of landmark
Code letter R Romeo followed by one or more figures for dis
tance in nautical miles
2 By Latitude and Longitude
Latitude
Code letter L Lima followed by a fourfigure group 2 figures
for Degrees 2 figures for Minutes and eitherN November
for Latitude North or S Sierra for Latitude South
Longitude
Code letter G Golf followed by a fivefigure group 3 figures
for Degrees 2 figures for Minutes and eitherE Echo for
Longitude East or W Whiskey for Longitude West
TABLE 3
Nature of Distress in Code
Code Words to be
Letters transmitted Text of Signal
AE Alfa Echo I must abandon my vessel
BF Bravo Foxtrot Aircraft is ditched in position indicated and
requires immediate Charlie Bravo I require immediate Charlie Bravo I require immediate assistance I am on fire
Soxisix
DX Delta Xray I am sinking
HW Hotel Whiskey I have collided with surface craft
Answer to Ship in Distress
CP Charlie Papa I am proceeding to your Echo Delta Your distress signals are Echo Lima Repeat the distress A
more comprehensive list of signals may be found in Chapter 2
APPENDIX
USRUSSIA SUPPLEMENTARY SIGNALS FOR NAVAL VESSELS
IR 1 I am engaged in oceanographic 2 I am hydrographic survey equipment meters astern
IR 3 I am recovering hydrographic survey equipment
IR 4 I am conducting salvage 1 I am attempting to retract a grounded vessel
MH 1 Request you not to cross my course ahead of me
NB 1 I have my unattached hydrographic survey equipment bearing in a direction from me as indicated Table 3 of ICS
PJ 1 I am unable to alter course to my starboard
PJ 2 I am unable to alter course to my port
PJ 3 Caution I have a steering casualty
PP 8 Dangerous operations in progress Request you remain clear of the hazard which is in the direction from me as indicated
Table 3 of ICS
QF 1 Caution I have stopped engines
QS 6 I am proceeding to anchorage on course
QV 2 I am in a fixed multiple leg moor using two or more anchors or buoys fore and aft Request you remain clear
QV 3 I am anchored in deep water with hydrographic survey equipment streamed
RT 2 I intend to pass you on your port side
RT 3 I intend to pass you on your starboard side
RT 4 I will overtake you on your port side
RT 5 I will overtake you on your starboard side
RT 6 I amFormation is maneuvering Request you remain clear of the hazard which is in the direction from me as indicated
Table 3 of ICS
RT 7 I shall approach your ship on starboard side to a distance of 100s of meters yards
RT 8 I shall approach your ship on port side to a distance of 100s of meters yards
RT 9 I shall cross astern at a distance of 100s of meters yards
RU 2 I am beginning a port turn in minutes
RU 3 I am beginning a starboard turn in minutes
RU 4 The formation is preparing to alter course to port
RU 5 The formation is preparing to alter course to starboard
RU 6 I am engaged in maneuvering exercises It is dangerous to be inside the formation
RU 7 I am preparing to submerge
RU 8 A submarine will surface within two miles of me within 30 minutes Request you remain clear
TX 1 I am engaged in fisheries patrol
SL 2 Request your course speed and passing intention
UY 1 I am preparing to aircraft on course
UY 2 I am preparing to conduct missile exercises Request you remain clear of the hazard which is in the direction from me as
indicated Table 3 of ICS
UY 3 I am preparing to conduct gunnery exercises Request you remain clear of the hazard which is in the direction from me
as indicated Table 3 of ICS
UY 4 I am preparing to conductam conducting operations employing explosive charges
UY 5 I am maneuvering in preparation for torpedo launching exercises Request you remain clear of the hazard which is in the
direction from me as indicated Table 3 of ICS
UY 6 I am preparing to conductam conducting underway replenishment on course Request you remain clear
UY 7 I am preparing to conduct extensive small boat and ship to shore amphibious training 8 I am maneuvering to landing 9 I am
preparing to conductam conducting helicopter operations over my stern
UY 10 I am testing my gun systems
UY 11 I am testing my missile systems
UY 12 I am preparing to conductam conducting exercises from aircraft on a towed target Request you
remain clear of the hazard which is in the direction from me as indicated Table 3 of ICS
ZL 1 I have received and understood you message
ZL 2 Do you understand Request
151
Special Warning SignalsThe following signals are used by Russian naval vessels to warn foreign vessels that they have
violated Regulations for entry navigating and stopping in Russian Territorial Waters Territorial Sea or Russian In
land Waters
SNG You have violated the Russian borders I demand that you
leave Russian waters immediately
SNO I demand that you leave Russian waters immediately
Unless you do so a force of arms will be used against you
SNP You are violating the regulations for navigating and remain
ing in Russian waters I demand that you cease violations
SNR Despite warnings you continue to violate the regulations
for navigating and remaining in Russian waters You are to
leave them By day these signals will be made by flags of the International Code of Signals By night they will be in Morse Code by signal
lamp In addition the signals may be transmitted by RT in plain language on 500 kHz 2182 kHz and 1568 MHz as well as by
voice using megaphone or any other amplifying device
Warning signals to foreign submarines which are submerged
The signal of two series of explosions with three explosions in each series where the interval between the explosions in a
series is one minute and the interval between the series is three minutes means You are in Russian waters I demand that you
surface immediately Unless you comply with this order within 10 minutes a force of arms will be used against you
An acoustic signal by sonar may be given with the same meaning as described above The signal will consist
of five dashes each dash three seconds long interval between dashes three
INDEXES
Instructions and General Signal Code 155
Medical Signal Code 159
INDEX
SIGNALING INSTRUCTIONS AND GENERAL SIGNAL CODE
SEE SEPARATE INDEX FOR MEDICAL SIGNAL CODE
Numbers refer to pages
A rafts 36 D
required 37
Abandon vessel 29 search 38 Damage casualties 49
Accident or distress position 43 send 37 received 49
signals 2930 Bodies located 47 Dangerous goods 84
Adrift boatraft 36 search and rescue 47 Dangers to navigation warnings 65
from anchorage 78 Boom across caution 67 Dead number of persons 30
Afloat 31 Bulkheads watertight 56 reckoning position 41
from grounding 54 Bunkers 89 Depression atmospheric pressure 94
Aground assistance 36 Buoy navigating and steering instruc deep 94
vessel 36 tions 73 intense 94
Ahead engine maneuvers 60 Buoys aids to navigation 62 Depth water 68
maneuvers 76 Burns severe 30 Derelict 65
Aids to navigation 62 Diesel oil 89
Aircraft in distress 39 C Disabled 31
locate 41 38
Alight 31 Cable hawser 58 Disembark 36
Alongside boatraft 36 Canal 63 Distress 3941
maneuvers 77 Cancel message 100 position 40 flags inside front cover ii Carbon tetrachloride fire
signals 3940
Anchor underwater operations 51 52 transmitting procedures 78 Cargo 84
Disturbance serious 34
portharbor 87 Cast off 60 Ditched 31
towing to 57 Casualties radiation 29 Diver underwater operations 51
Anchoring 7778 Caution navigate with 67 Doctor 30
Answer 100 Channel 63 Draft 69
Arms signaling 1516 Circling aircraft 32 Drift survival craft 44
Arrival estimated time of 88 Close distance 44 Drifting disabled 31 Clouds 91
declined not required 35 Coal 90 E
given not given 35 Collision 49
proceeding to 43 mat diver 51 Electronic navigation 7071
required 33 leak 56 Emergency signals 2948
Astern maneuvers 76 Communicate 100101 Engines pressure 94 acknowledge 100
Exercise signals aircraft 31 102
B calling 100 Exercises carrying out 89
exercise 102 Explanation and general remarks of
Ballast 84 reception 102 signals 3
Bar 56 transmission 102 Explosion distress 40
depthdraft 6869 Compass adjusting 71 Explosions fire 52
Barometer 94 Complements tables 104
Beaching 54 Connect towing 57 F
Beacons aid to navigation 62 Contact in distress 41
Bearing magnetic Fairway 63
Convoy 94
33 Fire assistance 34
Course aids to navigation 62 explosion 51
Berth 78 Firefighting appliances 52
indicate 64
Boarding 7980 Firing range 67
search and rescue 44
Boats available 37 Fishcatch carrier boat 85
Crew persons on board 84
INSTRUCTIONS AND GENERAL SIGNAL 8586 fast 91 Meteorology 9198
limits 86 floes 92 Minefield 71
protection 86 patrol ship 93 Mines 71
Fishing 85 Icebergs 93 Minesweeping 71
gear dangers to navigation 85 Icebreaker 93 Miscellaneous signals 88
vessel 85 single letter signals 25 Missing 45
Flag signaling 910 Icefield 93 Morse signaling by hand flags or arms
Flares 42 signal 90 15
Flashing light signaling 1112 Inflatable raft 32 symbols alphabet and numerals 17
Flight aircraft 32 Information available no 89 table 16
Floating ice 93 Injured number of persons 30 Mother ship fishing 85
mine 72 International Code of Signals
trawl 85 purpose 3 N
Flooded 56
Flying aircraft 32 K Navigating and steering instructions 87
Foam fire extinguisher 52 Navigation 6275
Fog 96 Keep away 74 lights 72
Follow wake 72 clear 74 Nets 85
Fuel oil 89 close 74 drift 90
seine 85
G O
Landing 31
Gale 91 boarding 80 Oil fire 52
Give way 74 Lead course 87 Oily mixture 84
Grounding 53 Leak 56 Overtake do not 74
Groups transmission signals 102 assistance 34
Leeward keep 73 P
Growlers ice 93
Lifesaving signals 140
station 39 Pack ice 93
Light searchlight 72 Parachute 32
Hand flags signaling 1516 Lighthouse 62 Pass ahead 73
Harbor anchorage 78 Lights aids to navigation 62 Passing signals 73
port 87 Lightvessel 62 Persons on board 84
Hawser 58 Line towing 58 saved or lost 47
Headway maneuvers 76 List assistance 33 Phonetic tables 1718 148
towingtugs 61 boatsrafts 36 Pick up persons by clearance 103 dangers to
navigation 68 33
Maritime Declaration of 103 Located wreckage 41 Picked up search and rescue 47
questions 103 Longline fishing 85 Pilot 87
Health Regulations 103 Lost persons 47 assistance 87
Heave to 83 Loud hailer voice over 5 20 boat 87
Helicopter signals 33 Low water 75 Pilotage radar 70 87
High water 75 Plain language 101
Holding ground anchorage 78 M Port harbor 87
Hostile aircraft 68 pilot 87
submarine 67 Make fast navigating and steering steer to navigating and steering in
vessel 67 instructions 73 structions 6275 towing line 59
Position indicate 41
Man overboard search and rescue 46 Pratique 103
I Maneuvers 80 Precautions tropical storm 91
towingtugs 60 Prevailing weather boatsrafts 36
Ice 91 Maritime Declaration of Health 103 Procedure signals 17 20
accretion 93 Mark to be transmitted table 148 Proceed 50
drift 92 Men on board 84 underway 80
INSTRUCTIONS AND GENERAL SIGNAL to assistance 35 Sick number of persons 30 Trawl 85
Propeller engines 79 Sight search and rescue 41 Tropical storm 91
shaft assistance 33 Signal cannot read transmission 100 Tsunami 67
engines 79 Signaling methods 5 Tug assistance navigation 67
Propeller underwater operations 51 Signals appropriate in all towing 56
Purse seine 85 definitions and meanings 4 Tugs 5661
explanation and general remarks 3
R general instructions 68 U
Radar 70 purpose International Code of 3 Underwater operations 51
Radiation danger 65 Signals appropriate in all Underway 81
hazard 68 20
Radio direction finder 70 V
Single letter signals material 65 for icebreaker aids to navigation 62 Veer
towing 59
assisted vessels 25 Vessel in distress 39
search and rescue 44 with complements 5 20 locate 41
Sinksunk vessels 39 Visibility procedures 147149 Slack towing 5 14 20
Visual contact search and rescue 44
Sludge ice 91 signals communicate 101
Rafts 36 Smoke float position 42
Read transmission signal cannot 100 position 42
signals position 42 Voice over loud hailer 5 20
Receive signal 100 SOSMAYDAY 39 139144 147149
102 Sound signaling 13 W
Refloating 54 signals position 42
Remain where you are 83 Speed 82 Wake navigating and steering 49
32 tions 73
Repeat signal 102 towing 61 steer in my 73
Rescue 46 Steer 73 Warnings 6668
results 47 Steering gear assistance 33 Warps fishery 86
Rocket fire search and rescue 46 Sternway maneuvers 76 Water depthdraft 6870
line look out for 46 towing 61 pumps fire 52
Rockets position by 42 Stop heave to 83 Weather 97
maneuvers 83 forecast 97
towing 61 Wind 97
Safety signal 100 Storm 91 Windward navigating and steering in
Save vessel cannot 46 Stretcher 30 33 structions 74
Sea 95 Submarine survey 51 Wreck 65
conditions 95 Survival craft 35 Wreckage 46
marker dye position 42 Survivors 4748
Sweep net 86 Z
Search 32
and rescue 4448 Swell 9596
conditions 95 Zone dangerous mines 71
assistance 32 Swept channel 72
authority 44
results navigation lights 72 Take off persons search and rescue 46
position 42 Temperature 94
Send boatraft 37 Tide 74
Set and drift search and rescue 44 Towing 56
Shallow water 65 line 58
Shelter anchorage 78 Toxic effects explosion 53
towing 58 Transmit 102
Shoal 65 Transmitter 71
INDEX
MEDICAL SIGNAL CODE
Numbers Refer to Pages
A localization of symptoms 110 J
Dislocation 114
Abscess 113 Doctors instructions 107 Joints diseases 114115 Dose and method and
dose method 127 frequency 127
Alcohol 119
Animal bite 115 E
Localization of symptoms diseases or
Answer to questions 125
injuries 110
Ear diseases 121
B External application frequency 128
Eye diseases 121 M
Bedsores 119
Masters instructions 107
Bleeding general symptoms 113 F
Medical advice 125129
particular symptoms 114
additional information request
Body organs other 130 Flatulence 117 125
regions 130132 Fractures 114 assistance request general symptoms 113
Medicaments list external use 111
G internal use 120
Mental diseases 118
Burn 115
Gangrene 115 state 111
General medical advice 125 Miscellaneous illness 122
C instructions 107 Muscles and joints diseases 122
symptoms 118 Genitourinary system diseases 118 N
Childbirth answers 123 Giddiness 119
questions 128
Nausea system diseases 119
H Nervous system and mental tables 130133135
Headache 118 Nose and throat diseases 114 Health previous 110
Corrosive swallowed 115 Heart and circulatory system P
thrown on patient 115 diseases 119
Cough diseases of respiratory system Hemorrhoids 117 Pain diseases of heart and Hernia
117 system 119
general symptoms 112 Hiccough 117 general symptoms 112
Cramp pains 117 Hospital admission 109 Parasitic diseases infectious and 120
Patient description 109
D I Poisoning 115
Poisons 115
Illness 122 Port nearest 109
Delirium tremens 119
Infectious and parasitic diseases 120 Prescribing medicaments 119
Injuries 114115 Progress report 125
localization of symptoms 110 Pulse diseases of heart and 116
Instructions to doctors 107 system 120
Diet 128
masters 107 general symptoms 111
Digestive system diseases 116
Diseases list of common 133 Isolation 120
INDEX
R Sweating 111 general symptoms 113
Swelling 113
Rash general symptoms 113 Symptoms particular 114115 V
infectious and parasitic diseases
120 T Vaccination infectious and 109
diseases 121
Reply to questions 125 Table M1 regions of body 130 smallpox system diseases 116 M2 list of common diseases
133 Venereal diseases 121
M3 list of medicaments 134 Vomiting diseases of digestive sys
S 135 tem 117
Temperature 110 general symptoms 113
Skin diseases 122 Throat diseases 115
Sleep unable to 112 Treatment by medicaments 127 W
Snake bite 115
Special treatment 125 U Wind anus has not passed 117
Sputum 116 Wound deep 114
Stool 116 Urine diseases of genitourinary sys
Suicide 114 tem 118

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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.