Sunday, July22, 2018

Chart Number One

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Chart No 1
UNITED STATES OF Chart Symbols Abbreviations and Edition November 2011
Chart No1
United States of Chart and jointly by
US Department of Oceanic and Atmospheric Ocean DC
US Department of to this edition will be published by the National Agency NGA
in the Notice to changes are also available on the Internet at Record of No Notice No Corrected On Corrected by
AND SCHEMATIC Chart Number Title and Marginal Notes
B Positions Distances Directions and Natural Features
D Cultural Features
E Landmarks
F Ports
G Topographic Tides and Currents
I Depths
J Nature of the Seabed
K Rocks Wrecks and Offshore Tracks and Routes
N Areas and Limits
P Lights
Q Buoys and Beacons
R Fog Signals
S Radar Radio and Satellite Navigation Systems
T Services
U Small Craft Leisure Index of International IALA
The 11th edition of U S Chart No 1 Nautical Chart Symbols Abbreviations and Terms presents the
symbols depicted on paper nautical charts produced by the National Oceanic and Atmospheric and the National Agency NGA as well as digital raster of
charts such as Raster Nautical Charts RNC This document also shows the symbols described in of the IHO for International INT Charts and Chart of the
IHO published by Hydrographic Organization IHO which are portrayed in the three official language versions Chart 1 INT Charts The symbols and
abbreviations displayed on navigation systems portraying Navigational Charts NOAA ENC or NGAproduced Digital Nautical Charts DNC are quite similar to
those used on paper charts for some features but different for others This document is not intended as a reference
for the use of these vectorbased in Column Order Previous editions of US Chart No 1 showed US symbology on the left side of the
page and INT 1 symbology in the second column from the right This edition of Chart No 1 has reversed the order
INT 1 symbols now appear in the second column from the left after the symbol number Any variations from INT 1
symbology that are used on charts produced by NOAA or NGA are shown in the NOAA NGA and the of foreign charts columns columns 4 5 and 6 When
columns 4 and 5 are combined this indicates that NOAA and NGA use the same symbol for that When any of columns 4 5 or 6 are blank then the INT 1
symbol has been adopted for use by for which that column applies The schematic layout following this introduction shows a typical symbol
table page and describes the table headers and the types of information presented in each of the Chart Layouts Section A presents two schematics
showing typical layouts of the major elements of
NOAA and NGA The sounding datum reference is stated in the chart title Soundings on NOAA and NGA charts may be
shown in fathoms feet fathoms and feet fathoms and fractions or meters and decimeters In all cases the unit of
depth used is shown in the chart title and outside the border of the chart in bold type See item Ab in Section A
Heights Heights of lights landmarks structures etc refer to the shoreline plane of reference The unit of height is
shown in the chart title When the elevations of islets or bare rocks are offset into the adjacent water they are shown
in Heights For rocks and banks that cover and uncover elevations are underlined and are referenced to the
sounding datum as stated in the chart title When the heights of rocks that cover and uncover are offset into the
adjacent water they are shown in Shoreline shown on charts represents the line of contact between the land and a selected In areas affected by
tidal fluctuation this line of contact is usually the mean highwater line In waters of diminished tidal influence a mean water level may be used The
shoreline of interior lakes is usually a line representing a specified elevation above a selected datum Shoreline is symbolized
by a heavy line symbol C1 Apparent shoreline is depicted on charts to show the outer edge of marine the shoreline limit would be expected to appear
to the observer or where it prevents the shoreline from being
clearly defined Apparent shoreline is symbolized by a lighter line symbols C32 C33 Ca Cq and Cr
Landmarks A structure or a conspicuous feature on a structure may be shown by a landmark symbol with a
descriptive label see Section E Prominent buildings that could assist the navigator may be shown by actual shape
as viewed from above see Sections D and E On NGA charts a landmark legend that is shown in capital that the landmark is conspicuous the landmark may
also be labeled CONSPICUOUS or CONSPIC On
NOAA charts all landmarks are considered to be conspicuous and landmark legends shown in all capital the landmark has been positioned accurately
legends using both upper and lower case letters indicate Buoyage System The International Association of Marine Aids to Navigation and Lighthouse
Maritime Buoyage System is followed by most of the worlds maritime nations however systems used in
some foreign waters may be different IALA buoyage is divided into two regions Region A and Region B All
navigable waters of the United States follow IALA Region B rules except US possessions west of the Line and south of 10 north latitude which follow
IALA Region A
The major difference in the two buoyage Regions is the color of the lateral marks Region A uses and Region B uses marks when entering from seaward
The shapes of lateral are the same in both Regions can to port and cone nun to starboard when entering from and other marks such as isolated danger
marks safe water marks and special marks are also the same in
both Regions Section Q and Appendix 1 illustrate the IALA Buoyage System for both Regions A and B
US Lateral Marks Most of US waters lie withing IALA Region B In the US system on entering a channel from
seaward buoys and beacon dayboards on the starboard side are red with even numbers and have red lights if lit
Buoys and beacon dayboards on the port side are green with odd numbers and have green lights if lit buoys have red and green horizontal bands with
the top band color indicating the preferred side of Range Visibility A lights range or visibility is given in nautical miles except on the Great
Lakes and
adjacent waterways where light ranges are given in statute miles For lights having more than one color NOAA
charts give only the shortest range of all the colors On NGA charts multiple ranges may be shown using the
following convention For lights with two colors the first number indicates the range of the first color and the second
number indicates the range of the second color For example Fl WG 128M indicates that the range of the white light
is 12 nautical miles and the range of green light is 8 nautical miles For lights with three colors only the longest and
shortest ranges are given For example Fl WRG 128M indicates that the range of the white light is 12 nautical miles
the range of green light is 8 nautical miles and the range of the red light is somewhere between 8 and 12 of Aids to Navigation The fixed and
floating aids to navigation depicted on charts have of reliability Floating aids are moored to sinkers by varying lengths of chain and may shift due
to and other causes Buoys may also be carried away capsized or sunk Lighted buoys may and sound signals may not function because of ice or other
causes Therefore prudent mariners will
not rely solely on any single aid to navigation particularly on floating aids but will also use bearings from fixed
objects and aids to navigation on shore
Colors Color conveys the nature and importance of features found on nautical charts Chart elements significant to
marine navigation such as lights compass roses and regulated areas are emphasized with magenta Lateral
marks on NOAA charts are shown with a red or green fill Shades of blue depict potential hazards to shallow water and submerged obstructions Areas of
deeper water believed to be clear of obstructions are
shown as white Land and other features that are always dry are depicted with buff on NOAA charts and gray on
NGA charts Foreshore and other intertidal features are portrayed with a green tint Other colors may be used to
provide additional information such as protected areas which are outlined in blue or green and mineral lease
blocks which are outlined in red
Traffic Separation Schemes Traffic separation schemes show recommended vessel traffic lanes to of navigation particularly in areas of highdensity
shipping These schemes are described in the Organization IMO publication Ships Routeing Traffic separation schemes are generally shown on
nautical charts at scales of 1600000 and larger When possible traffic separation schemes are plotted to scale and
shown as depicted in Section Scales Depth conversion scales are provided on all charts to enable the user to work in or Date The date of each new
chart edition is shown below the lower left border of the chart The date of
the latest NGAissued US Notice to Mariners applied to the chart is shown after the edition date NOAA the date of the latest US Coast Guard Local
Notice to Mariners applied to the Resources Information about the use of nautical charts aids to navigation sounding datum and the
general practice of navigation can be found in The American Practical Navigator available via the at Tide and tidal current data in US waters is
available from the NOAA Center for Operational and Services at Detailed information about specific lights buoys and beacons located in United
States waters and about the US Aids to Navigation System and the Uniform State Waterway Marking Systems is
published in the US Coast Guard Light List available at about lighted and radio aids to navigation located in waters outside of the United States is
published in
the NGA List of Lights available via the hyperlink at Other important information that cannot be shown conveniently on nautical charts can be found
in the NOAA US
Coast Pilot publications available at or in the NGA
Sailing Directions publications available via the hyperlink at Nautical Chart Catalogs and Indexes These catalogs list nautical charts auxiliary
maps and They include general information relative to the use and ordering of nautical products NOAA catalogs
are available at NGA product catalog entries are available
as a searchable database via the Product Catalog hyperlink at and Comments Notices of
corrections to this publication are published in the US Notice to
Mariners available via the Notice to Mariners hyperlink at Users should refer corrections additions and comments to the Worldwide Navigational
Warning Service 24hour
Watch Desk toll free commercial 5715475455 DSN 5475455 email or by mail to
Maritime Safety Office
Mail Stop N64SH
National Agency
7500 GEOINT Drive
Springfield VA 7
Schematic Layout of Chart No1
Section Reference to national symbols at the end of each section
to terms in other sections
Column 1 Numbering system following the Chart Specification of the IHO A letter in this column indicates a supplementary national
symbol or abbreviation for which there is no international Column 2 of symbols that follow the Chart of the IHO
Column 3 Description of symbols term or Column 4 used on charts produced by the National Ocean Service NOS if different from column 2 In
instances the is clarified by a label on the chart
Column 5 used on charts produced by National Agency NGA
Note When NOS and NGA symbols are identical their columns are combined
Column 6 of symbols that may appear on NGA reproductions of foreign charts
A Chart Number Title and Marginal Features B Tidal Data H Satellite Navigation Systems S
Chart number in national chart series
Chart number in International INT chart series
Chart datum
A Chart Number Title and Marginal Notes
Publication note imprint
Copyright note
Edition note
Notice to Mariners Dimensions of inner borders
Corner Chart title
Explanatory notes on chart construction etc To be read before using chart
Scale of chart Some charts have scale at a stated latitude
Linear scale on largescale charts
Linear border scale on largescale charts On smaller scales use latitude borders for sea miles
Cautionary notes if any Information on particular features to be read before using chart
Source Diagram if any The source Diagram should be studied before using the chart in order to assess the reliability of the sources
Navigators should be cautious where surveys are inadequate
Reference to a largerscale chart
Reference to an adjoining chart of similar scale
Instruction to refer to complementary nautical Conversion Scales
Reference to the units used for depth Compass Rose
Bar code and stock number
Glossary Translation of words on chart that are not in English
of a latticed chart if any
Tidal and Tidal Stream information within the chart coverage
A Chart Number Title and Marginal Features B Tidal Data H Satellite Navigation Systems S
Chart number in national chart series
Chart number in International INT chart series
Chart datum
A Chart Number Title and Marginal Notes
Publication note imprint
Copyright note
Edition note
Notice to Mariners Dimensions of inner borders
Corner Chart title
Explanatory notes on chart construction etc To be read before using chart
Scale of chart Some charts have scale at a stated latitude
Linear scale on largescale charts
Linear border scale on largescale charts On smaller scales use latitude borders for sea miles
Cautionary notes if any Information on particular features to be read before using chart
Source Diagram if any The source Diagram should be studied before using the chart in order to assess the reliability of the sources
Navigators should be cautious where surveys are inadequate
Reference to a largerscale chart
Reference to an adjoining chart of similar scale
Instruction to refer to complementary nautical Conversion Scales
Reference to the units used for depth Compass Rose
Bar code and stock number
Glossary Translation of words on chart that are not in English
of a latticed chart if any
Tidal and Tidal Stream information within the chart coverage
B Positions Distances Directions and Positions
1 Lat Latitude
2 Long Longitude
International Meridian
3 Greenwich
4 Degrees
5 Minutes of arc
6 Seconds of arc
7 PA Position approximate PA PA
8 PD Position doubtful PD PD
9 N North
10 E East
11 S South
12 W West
13 NE Northeast
14 SE Southeast
15 NW Northwest
16 SW Points
20 Triangulation point
21 Observation spot
22 Fixed point
23 Boundary mark
Distance along waterway no
251 visible marker
Distance along waterway with
252 visible Positions Examples
Symbols in plan position is
30 center of primary symbol
B Positions Distances Directions and Compass
Symbols in profile position is at
31 bottom of symbol
Point symbols accurate
32 Approximate Supplementary national
symbols a m
40 km m Meters
42 dm cm mm M International nautical miles or Mi NMi NM
sea miles 1852m
46 Cable 01M cbl
47 ft FootFeet
48 Fathoms fm
49 h Hour hr
50 m min Minutes of time
51 s sec Seconds of time
52 kn Knots
53 t Tonnes Tons Tonnage
54 cd Compass Supplementary national symbols n
60 Variation var VAR
61 Magnetic mag
62 Bearing brg
63 True T
64 Annual change
67 Deviation dev
B Positions Distances Directions and Compass
Note of magnetic variation in
681 position
Note of magnetic variation out of
682 position
Compass rose normal pattern smaller patterns of compass rose may be used
Magnetic variation example on magnetic north arrow
VAR 4o15W 2011 means Magnetic Variation was 4o15W in 2011
ANNUAL CHANGE 8W means annual change is 8E or decreasing 8 15
B Positions Distances Directions and Compass
71 Isogonic lines Local magnetic anomaly
Within the enclosed area the
821 magnetic variation may
deviate from the normal by
the value shown
Local magnetic anomaly
Where the area affected
822 cannot be easily defined a
legend only is shown at the
National Symbols
a Square meter
b Cubic meter
c Inches in
d Yards yd
e Statute mile St M St Mi
f g Hertz Hz
h Kilohertz kHz
i Megahertz MHz
j Cyclessecond cps cs
k Kilocycle kc
l Megacycle Mc
m Tons US short ton 2000lbs T
n Degrees deg
C Natural Supplementary national symbols a d p t
Foreshore I J
1 Coastline Coastline Cliffs Steep coast Steep coast
3 with rock cliffs
4 Flat coast
6 Sandy shore
7 Stony shore Shingly shore
8 Sandhills Dunes
C Natural Supplementary national symbols e g
Plane of reference for heights H
Contour lines with values and
10 spot height
11 Spot heights
Approximate contour lines with
12 values and approximate height
13 Form lines with spot height
Approximate height of top of
14 trees above height Features Lava Supplementary national
symbols h
20 River Stream
21 Intermittent river
22 Rapids Lakes
24 Salt pans
C Natural Lava
Supplementary national symbols i o
30 Woods in Prominent trees isolated or in Deciduous tree
312 Evergreen except Palm
315 Nipa Palm
Marsh Swamp Reed beds
C Natural National Symbols
Chart sounding datum line
a Approximate sounding datum line
b inadequately Foreshore Strand in general
c Stones Shingle Gravel Mud
d Breakers along a shore
e Rubble
f Shading
h Lagoon
i Deciduous woodland
C Natural Features
j Coniferous Tree Cultivated fields
m Paddy rice fields
o Bushes
p Apparent Vegetation or topographic
q Feature Area Limit in Cypress
s Grass
t Eelgrass
D Cultural of objects E Landmarks E
1 Urban area
Settlement with scattered
2 Settlement on medium and
3 smallscale charts
4 Village
5 Important building in builtup
6 area
7 Street name Road name
8 Ruin Ruined Railways Airfield Supplementary National Symbols a c
10 Road hard surfaced
Track Path loose or
12 22
D Cultural Railway with Tunnel
17 Airport Cultural Features Supplementary National Symbols d i
Vertical clearance above High
20 Water
21 Horizontal Fixed bridge with vertical
22 clearance
Opening bridge in general with
231 vertical clearance
Swing bridge with vertical
232 clearance
Lifting bridge with vertical
233 clearance closed and open
D Cultural Features
Bascule bridge with vertical
234 Pontoon bridge
Draw bridge with vertical
236 clearance
Transporter bridge with vertical
24 clearance below fixed structure
Overhead transporter Aerial
25 cableway with vertical
Overhead power cable with
pylons and safe vertical
Note The safe vertical clearance above the height datum as defined by the responsible authority is given in magenta where known
otherwise the physical vertical clearance is shown in black as in D 20 for the lowest wires also see diagram at H 20
Overhead cable Telephone line
27 Telegraph line with vertical
Overhead pipe with vertical
28 Pipeline on land
D Cultural National Symbols
a Highway markers
Railway Ry
b single or double track
Railroad RR
c Abandoned Bridge under Viaduct
g Fence
h Power transmission line
i Approximate vertical 25
E of reference for Height H Lighthouses P Beacons Q
1 Examples of landmarks
Examples of conspicuous
landmarks On NOAA charts a
large circle with dot and capitals
2 indicate that position is accurate
small circle and lowercase
indicates position is
Pictorial sketches in true
31 position
Pictorial sketches out of
32 position
Height of top of a structure
4 above height datum
Height of structure above ground
5 Church Church
Church cupola
11 Chapel
12 Cross Calvary
13 Temple
14 Pagoda
15 Shinto shrine Joss house
16 Buddhist temple or shrine
E Mosque Minaret
18 Tower
Water tower Water tank on a
21 tower
22 Flare stack on land
Monument including column
24 pillar obelisk Windmill without Wind turbine Wind farm
27 Flagstaff Radio mast Television mast
29 Radio tower Television tower
301 Radar mast
302 Radar tower
303 Radar scanner
E Radar dome
31 Dish aerial
32 Tanks
33 Silo
Fortified structure on charts
Castle Fort Blockhouse on
342 smallerscale charts
Battery Small fort on smaller
343 scale Quarry on largescale Quarry on smallerscale charts
36 Mine
371 Recreational vehicle site
Camping site recreational National Symbols
a Muslim shrine
b Tomb
c Watermill
d Factory
e Well
f School
g Hospital
E Landmarks
h Gable
Telegraph Tel
k Telegraph office Tel Off
l Magazine Magz
m Government house Govt Ho
n Institute Inst
o Courthouse Ct Ho
p Pavilion Pav
q Telephone T
r Limited Ltd
s Apartment Apt
t Capitol Cap
u Company Co
v Corporation Corp
F Structures Supplementary national symbols a c
1 Dyke Levee Berm
Seawall on charts
Seawall on charts
3 Breakwater in general
Breakwater loose boulders
42 tetrapods etc
Breakwater slope of concrete
43 or masonry
Training wall partly
5 submerged at high water
F Ports
61 Groin always dry
62 Groin Groin always under I Anchorages Limits N Beacons
and other fixed marks Q Marina U
10 Fishing Boat harbor Marina
112 Yacht berths without Yacht club Sailing club
12 Mole with berthing Quay Wharf
14 Pier Jetty
15 Promenade pier
16 Landing for boats
18 Steps Landing stairs
F Ports
191 Designation of berth
192 Visitors berth
20 Deviation dolphin
22 Minor post or pile
23 Slipway Patent slip Ramp
24 Gridiron Scrubbing grid
25 Dry dock Graving dock
26 Floating dock
27 Nontidal basin Wet dock
28 Tidal basin Tidal harbor
Floating barrier eg oil
291 barrier security barrier
F Ports
Oil retention barrier high
292 pressure pipe
30 Works on land with year date
Works at sea Area under
31 reclamation with year date
Under construction 2009 Works under with year date
Works in progress Ruin
Ruined pier partly at high water
34 Barrages Supplementary national symbol d
Clearances D Signal Stations T Distance Marks B
40 Lock on largescale Lock on smallerscale
Caisson Gate
43 Flood Dam Weir direction of flow
F Facilities Supplementary national symbols g
Roads D Railways D Tanks E
Rollon Rolloff RoRo Ferry
50 Terminal
Transit shed Warehouse
51 with Timber yard
Crane with lifting Traveling crane on railway
Container crane with lifting
532 Sheerlegs Buildings Supplementary national symbol e f
60 office
61 Custom office
Health office Post office
F National Symbols
a Jetty partly below MHW
b Submerged jetty
c Jetty on smallerscale charts
d Mooring Canal
e Quarantine office
f Pumpout Conveyor
G Topographic Island 8 Head Headland
2 Islet 9 Point
3 Cay 10 Spit
4 Peninsula 11 Rock
5 Archipelago 12 Salt marsh Saltings
6 Atoll 13 Lagoon
7 Cape
Natural Inland Features
20 Promontory 30 Plateau
21 Range 31 Valley
22 Ridge 32 Ravine Cut
23 Mountain Mount 33 Gorge
24 Summit 34 Vegetation
25 Peak 35 Grassland
26 Volcano 36 Paddy field
27 Hill 37 Bushes
28 Boulder 38 Deciduous woodland
29 Tableland Tableland 39 Coniferous City Town 53 Farm
51 Village 54 Saint
52 Fishing Structure 74 Institute
61 House 75 Cathedral
62 Hut 76 Monastery Convent
63 Multistory building 77 Lookout station Watch tower
64 Castle 78 Navigation school
65 Pyramid 79 Naval college
66 Column 80 Factory
67 Mast 81 Brick kiln Brick works
68 Lattice tower 82 Cement works
69 Mooring mast 83 Water mill
70 Floodlight 84 Greenhouse
71 Town hall 85 Warehouse Storehouse
72 Office 86 Cold store Refrigerating storage
73 Observatory 87 Refinery
G Topographic Terms
88 Power station 94 Well
89 Electric works 95 Telegraph office
90 Gas works 96 Hotel
91 Water works 97 Sailors home
92 Sewage works 98 Spa hotel
93 Machine house Pump house
Road Rail and Air Traffic
110 Street Road 115 Avenue 116 Runway
112 Tramway 117 Landing lights
113 Viaduct 118 Helicopter landing site
114 Suspension Harbors
130 Tidal barrier 144 Customs harbor
131 Boat lift Slip lift Hoist 145 Naval port
132 Minor canal 146 Industrial harbor
133 Sluice 147 Commercial port Trade port
134 Basin 148 Building harbor
135 Reservoir 149 Oil harbor
136 Reclamation area 150 Ore harbor
137 Port 151 Grain harbor
138 Harbor 152 Container harbor
139 Haven 153 Timber harbor
140 Inner harbor 154 Coal harbor
141 Outer harbor 155 Ferry harbor
142 Deep water harbor 156 Police
143 Free port
Harbor Terminal 180 Row of piles
171 Building slip 181 Bollard
172 Building yard 182 Conveyor
173 Buoy yard Buoy dump 183 Storage tanker
174 Bunker station 184 Lighter Aboard Ship LASH
175 Reception facilities for oily wastes 185 Liquified Natural Gas LNG
176 Tanker cleaning facilities 186 Liquified Petroleum Gas LPG
177 Cooling water 187 Very Large Crude Carrier VLCC
178 Floating barrier boom 188 Ultra Large Crude Carrier ULCC
179 Piling 189 Shipyard
H Tides and Relating to Tidal Levels Supplementary national symbols a i
1 CD Chart Datum Datum for sounding reduction
2 LAT Lowest Astronomical Tide
3 HAT Highest Astronomical Tide
4 MLW Mean Low Water
5 MHW Mean High Water
6 MSL Mean Sea Level
7 Height datum Land survey datum
8 MLWS Mean Low Water Springs
9 MHWS Mean High Water Springs
10 MLWN Mean Low Water Neaps
11 MHWN Mean High Water Neaps
12 MLLW Mean Lower Low Water
13 MHHW Mean Higher High Water
14 MHLW Mean Higher Low Water
15 MLHW Mean Lower High Water
16 Sp Spring tide
17 Np Neap tide
Tidal Levels and Charted Data Tide Gauge T
H Tides and Tables
statement of
semidiurnal or
diurnal tides
Note The order
30 of the columns of
levels will be the
same as that
used in national
tables of tidal
Tidal stream Streams and Currents Supplementary national symbols m u
Breakers K Tide Gauge T
40 Flood tide stream with rate
41 Ebb tide stream
42 Current in restricted waters
Ocean current with rates and
43 Overfalls tide rips races
45 Eddies
Position of tabulated tidal
46 stream data with designation
Offshore position for which
47 tidal levels are 39
H Tides and National Symbols
a High Water HW
b Higher High Water HHW
c Low Water LW
d LowWater Datum LWD
e Lower Low Water LLW
f Mean Tide Level MTL
g Indian Spring Low Water ISLW
HighWater full and change
h Vulgar establishment of the HWFC
i LowWater full and change LWFC
j Columbia River Datum CRD
k Gulf Coast Low Water Datum GCLWD
l Stream Str
m Current general with rate
n Velocity Rate vel
o Knots kn
p Height ht
q Flood fl
r New moon
s Full moon
t Current diagram
u Gulf Stream Limits
I Depths
1 ED Existence doubtful
2 SD Sounding of doubtful depth
31 Rep Reported but not confirmed
32 Rep2011 Reported with year of report
but not confirmed
Reported but not confirmed
4 sounding or danger
on smallscale charts only
Soundings Supplementary national symbols a c
Plane of Reference for Depths H Plane of Reference for Heights H
Sounding in true position
NOAA uses upright
10 soundings on English unit
charts and sloping soundings
on Metric charts
11 Sounding out of position
Least depth in narrow
12 channel
No bottom found at depth
13 shown
Soundings which are
unreliable or taken from a
smaller scale source NOAA
14 uses sloping soundings on
English unit charts and
upright soundings on Metric
Drying heights and contours
15 above chart datum
Natural watercourse in
16 intertidal area tidal gully
Depths in Fairways and Areas Supplementary national symbols a b
Plane of Reference for Depths H
20 Limit of dredged area
I Depths
Dredged channel or area with
21 depth of dredging in meters
and Dredged channel or area with
22 depth and year of the latest
control survey
Dredged channel or area with
23 maintained depth
Area swept by wire drag The
depth is shown at Chart
24 Datum The latest date of
sweeping is shown in
Unsurveyed or inadequately
25 surveyed area area with
inadequate depth 42
I Depths
Depth Contours
31 Approximate depth contours
Supplementary National Symbols
a Swept channel
Swept area not adequately
b shown by purple or green
c Stream
J Nature of the of Seabed Supplementary national a ag
Rocks K
1 S Sand
2 M Mud
3 Cy Clay
4 Si Silt
5 St Stones
6 G Gravel
7 P Pebbles
8 Cb Cobbles
91 R Rock Rocky Rk rky
92 Bo Boulders Blds
10 Co Coral Coralline algea
11 Sh Shells skeletal remains
Two layers eg sand over
121 SM
The main constituent is given
122 fSMSh first for mixtures eg fine f S M Sh
sand with mud and Wd Weed including kelp
132 Kelp Weed
14 Spring in of Seabed Intertidal Areas
20 Areas with stones and gravel
Rocky area which covers and
21 uncovers
Coral reef which covers and
22 uncovers
J Nature of the Terms Supplementary national symbols ah bf
30 f Fine
Note J 3032 to be
31 m Medium used only in relation
to sand
32 c Coarse
33 bk Broken
34 sy Sticky
35 so Soft
36 sf Stiff
37 v Volcanic vol
38 ca Calcareous Ca
39 h National Ground Grd
b Ooze Oz
c Marl Ml
d Shingle Sn
f Chalk Ck
g Quartz Qz
h Schist Sch
i Coral head Co Hd
j Madrepores Mds
k Volcanic ash Vol Ash
l Lava La
m Pumice Pm
n Tufa T
o Scoriae Sc
p Cinders Cn
q Manganese Mn
r Oysters Oys
s Mussels Ms
t Sponge Spg
u Kelp K
v Grass Grs
w Seatangle Stg
x Spicules Spi
y Foraminifera Fr
z Globigerina Gl
aa Diatoms Di
ab Radiolaria Rd
ac Pteropods Pt
J Nature of the Seabed
ad Polyzoa Po
ae Cirripedia Cir
af Fucus Fu
ag Mattes Ma
ah Small sml
ai Large lrg
aj Rotten rt
ak Streaky str
al Speckled spk
am Gritty gty
an Decayed dec
ao Flinty fly
ap Glacial glac
aq Tenacious ten
ar White wh
as Black bl bk
at Violet vi
au Blue bu
av Green gn
aw Yellow yl
ax Orange or
ay Red rd
az Brown br
ba Chocolate ch
bb Gray gy
bc Light lt
bd Dark dk
be Varied vard
bf Uneven unev
K Rocks Wrecks and Danger line A danger line
draws attention to a danger
which would not stand out
clearly enough if
1 represented solely by its
symbol eg isolated rock or
delimits an area containing
numerous dangers through
which it is unsafe to navigate
2 Swept by wire drag or diver
Depth unknown but
3 estimated to have a safe
clearance to the depth of Reference for Heights H Plane of Reference for Depths H
Rock islet which does not
10 cover height above height
Rock which covers and
11 uncovers height above chart
Rock awash at the level of
12 chart datum
Underwater rock of unknown
13 depth dangerous to surface
Underwater rock of known
141 depth inside the
corresponding depth area
Underwater rock of known
depth outside the
142 corresponding depth area
dangerous to surface
Underwater rock of known
15 depth not dangerous to
surface 47
K Rocks Wrecks and Coral reef which is always
16 and Fouls Supplementary
national symbols c
Plane of Reference for Depths H
Wreck never covers on large
20 scale charts
Wreck covers and uncovers
21 on largescale charts
Submerged wreck depth
22 known on largescale charts
Submerged wreck depth
23 unknown on largescale
Wreck showing any portion of
24 hull or at level
of Chart Datum
Wreck of which the masts
25 only are visible at Chart Datum
Wreck least depth known by
26 sounding only
Wreck least depth known
27 swept by wire drag or diver
Dangerous wreck depth
28 unknown
Sunken wreck not dangerous
29 to surface navigation
Wreck least depth unknown
30 but considered to have a safe
clearance to the depth shown
Foul ground to navigation but to be avoided
31 by vessels anchoring trawling
etc eg remains of wreck
cleared 48
K Rocks Wrecks and and of Reference for Depths H Kelp Seaweed J Underwater Installations L
40 Obstruction depth unknown
Obstruction least depth
41 known by sounding only
Obstruction least depth
42 known swept by wire drag or
Stumps of posts or piles
431 wholly submerged
Submerged pile stake snag
432 or stump with exact Fishing stakes
Fish trap Fish weir Tunny
442 nets
Fish trap area Tunny nets
45 area
461 Fish haven
Fish haven with minimum
462 depth
47 Shellfish beds
Marine farm on charts
Marine farm on charts
K Rocks Wrecks and National Symbols
a Rock awash height unknown
Shoal sounding on isolated
b rock or rocks
Sunken wreck covered 20 to
c 30 meters
d Submarine volcano
e Discolored water
Sunken danger with depth
f cleared swept by wire drag
g Reef of unknown extent Reef
Coral reef detached
h uncovers at sounding datum
i Submerged crib
j Crib duck blind above water
k Submerged duck blind
l Submerged platform
Coral reef which covers and
m Sinkers
Foul area foul with rocks or
o wreckage dangerous to
Unexploded ordnance
q Float
Stumps of posts or piles which
r cover and uncover
L Offshore and Limits N
1 Name of oilfield or gasfield
Platform with designation
2 name
Limit of safety zone around
3 offshore 4 Limit of development area
Wind turbine floating wind
51 turbine vertical clearance
under blade
Wind farm
Wind farm Wave and Buoys Q
Production platform Platform
10 Oil derrick
11 Flare stack at sea
Single Point Mooring SPM
12 including Single Anchor Leg
Mooring SALM Articulated
Loading Column ALC
13 with name
Disused platform with
14 Artificial island
L Offshore Single Buoy Mooring SBM
16 Oil or gas installation buoy
Catenary Anchor Leg Mooring
17 Moored storage tanker
18 Mooring ground Installations Supplementary national symbol a
Plane of Reference for Depths H Obstructions K
20 Submerged production well
Suspended well depth over
211 wellhead unknown
Suspended well with depth
212 over Wellhead with height above
the sea floor
22 Site of cleared platform
Abovewater wellhead lit or
23 unlit
24 Underwater turbine
Subsurface Data Acquisition System
301 Submarine cable
302 Submarine cable area
311 Submarine power cable
312 Submarine power cable area
32 Disused submarine cable
L Offshore Pipelines
Supply pipeline oil gas chemicals water
Supply pipeline area
402 unspecified oil gas chemicals
Outfall and intake water sewer outfall intake
Outfall and intake area
412 unspecified water sewer
outfall intake
Buried pipeline pipe with
421 nominal depth to which Pipeline Tunnel
Potable Water intake diffuser
43 or crib
44 Disused National Symbols
a Submerged well buoyed
M Tracks and Supplementary national symbols a c
Tracks Marked by Lights P Leading Beacons Q
Leading line solid line is the
1 track to be followed means
in line
Transit other than leading line
2 clearing line
Recommended track based on a
3 system of fixed marks
Recommended track not based
4 on a system of fixed marks
Oneway track and DW track
51 based on a system of fixed
Oneway track and DW track not
52 based on a system of fixed
Recommended track with
6 maximum authorized draft
Measures Supplementary national symbols d e
Basic Symbols
10 Established mandatory
direction of traffic flow
11 Recommended direction of
traffic flow
Separation line Separation zone
Limit of restricted routing
14 measure eg Inshore Traffic
Zone ITZ Area to be Avoided
15 Limit of routing measure
16 Precautionary area
Archipelagic Sea Lane ASL
17 axis line and limit beyond which
vessels shall not navigate
Fairway designated by
18 regulatory 54
M Tracks and of Routing Measures
M Tracks and of Routing Measures
Traffic Separation Scheme TSS traffic separated by separation zone
Traffic Separation Scheme traffic separated by natural Traffic Separation Scheme with outer separation zone separating traffic using scheme
from traffic not using it
Traffic Separation Scheme roundabout with separation zone
Traffic Separation Scheme with crossing gates
Traffic Separation Scheme crossing without designated precautionary area
Precautionary area
Inshore Traffic Zone ITZ with defined end limits
Inshore Traffic Zone without defined end limits
Recommended direction of traffic flow between traffic separation schemes
Recommended direction of traffic flow for ships not needing a deep water route
Deep Water route DW as part of oneway traffic lane
Twoway Deep Water routewith minimum depth stated
Deep Water route center line as recommended oneway or twoway track
Recommended route oneway and twoway often marked by centerline buoys
Twoway route with oneway sections
Area to be Avoided ATBA around navigational aid
Area to be Avoided eg because of danger of Surveillance Systems
30 Radar surveillance Radar Radar
reference line
Radar reference line with a leading line
M Tracks and Reporting
Radio reporting callingin or
way points showing of vessel movement with
designation if any and VHF
Radio reporting Ferry
51 Cable National Symbols
Recommended track for deep
a draft vessels track not defined
by fixed marks
Depth is shown where it has
b been obtained by the cognizant
c Alternate course
Established traffic separation
d scheme If no separation zone exists the
e center of the roundabout is
shown by circle
N Areas and and Swept Areas I Submarine Cables Submarine Pipelines L Tracks Routes M
Maritime limit in general
usually implying permanent
11 physical obstructions tint
band for emphasis
Maritime limit in general
usually implying no permanent
12 physical obstructions tint
band for Limit of restricted area
Limit of area into which entry is
22 and Anchorage Areas
10 Anchor berths
Anchor berths with swinging
112 circle
Note Anchors as part of the limit symbol are not shown for small areas Other types of anchorage areas may be
Anchorage area in Numbered anchorage area
123 Named anchorage area
Deep water anchorage area
124 Anchorage area for deep draft
N Areas and Limits
125 Tanker anchorage area
Anchorage area for periods up
126 to 24 Explosives anchorage area
128 Quarantine anchorage area
129 Reserved anchorage area
13 Seaplane operating area
14 Anchorage for Areas Supplementary national symbols d e g
20 Anchoring Fishing 59
N Areas and Limits
Limit of nature reserve
Bird Seal Nonspecific nature reserve
National parks Marine
Reserves MR
Particularly Sensitive Sea Area
Explosives dumping ground
231 individual mine or Explosives dumping ground
232 disused
Foul Dumping ground for chemical
24 waste
25 Degaussing range DG range
N Areas and Limits
Historic wreck and restricted
26 area
27 Maximum Practice Areas
30 Firing practice area
Military restricted area entry
31 Minelaying and counter
32 measures practice area
Submarine transit lane and
33 exercise area
34 Boundaries and National Limits Supplementary national symbols a f h
40 International boundary on land
International maritime
41 boundary
Straight territorial sea baseline
42 with base point
43 Seaward limit of territorial sea
44 Seaward limit of contiguous
45 Limits of fishery zones
46 Limit of continental shelf
Limit of Exclusive Economic
47 Zone EEZ
48 Customs limit
N Areas and Limits
49 Harbor Limits Supplementary national symbols a b
Limit of fast ice Ice front with
601 date
Limit of sea ice pack ice
602 seasonal with date
Floating barrier including log
61 ponds security barriers ice
booms shark nets
621 Spoil Spoil ground Extraction dredging area
64 Cargo transhipment area
65 Incineration National symbols
a COLREGS demarcation line
b Limit of fishing area fish trap
c Dumping ground
d Dumping area Dump site
e Limit of airport
Reservation line
f Options
g Dump site
h Three Nautical Mile Line
i No Discharge Zone
O Hydrographic Terms
1 Ocean 43 Shelfedge
2 Sea 44 Slope
3 G Gulf 45 Continental slope
4 B Bay Bayou 46 Continental rise
5 Fd Fjord 47 Continental borderland
6 L Loch Lough Lake 48 Basin
7 Cr Creek 49 Abyssal plain
8 Lag Lagoon 50 Hole
9 C Cove 51 Trench
10 In Inlet 52 Trough
11 Str Strait 53 Valley
12 Sd Sound 54 Median Valley
13 Pass Passage Pass 55 Canyon
14 Chan Channel 56 Narrows 57 Moat Sea moat
16 Entr Entrance 58 Fan
17 Est Estuary 59 Apron
18 Delta 60 Fracture zone
19 Mth Mouth 61 Scarp Rd Roads Roadstead 62 Sill
21 Anch Anchorage 63 Gap
22 Apprs Approach Approaches 64 Saddle
23 Bk Bank 65 Levee
24 66 Province
25 Shl Shoal 67 Tideway Tidal gully
26 Rf Co rf Reef Coral reef 68 Sidearm
Turning basin Turning area
27 Sunken rock 69 Turning Circle
28 Le Ledge Other Terms
29 Pinnacle 80 projected
30 Ridge 81 lighted
31 Rise 82 buoyed
32 Mt Mountain Mount 83 marked
33 SMt Seamount 84 anc ancient
34 Seamount chain 85 dist distant
35 Pk Peak 86 lesser
36 Knoll 87 closed
37 Abyssal hill 88 partly
38 Tablemount 89 approx Plateau 90 Subm subm submerged
40 Terrace 91 shoaled
41 Spur 92 exper Continental Shelf 93 D Destr
P Structures and Major Floating Lights
Minor Light Floats Q30 31
Major light minor light light
1 lighthouse
2 Lighted offshore platform
3 Lighted beacon tower
4 Lighted beacon
Articulated light buoyant
5 beacon resilient beacon
Major floating light light vessel
6 major light float Minor lights fixed and floating usually conform to IALA Maritime Buoyage System
Navigational lights on
7 landmarks or other 8 Light off chart Characters on Light Buoys
Abbreviation Illustration Period shown
Class of light
International F F Fixed
Occulting total duration of light longer than total duration of darkness
Oc Oc Oc2
Oc 2 Example
Oc 23 Composite Example
Isophase duration of light and darkness equal
Iso Iso Isophase
P Lights
Flashing total duration of light shorter than total duration of darkness
Fl Fl Fl3
Fl 3 Example
Fl 21 Composite Example
Longflashing flash 2s or
105 LFl L Fl
Abbreviation Illustration Period shown
Class of light
International Quick repetition rate of 50 to 79 usually either 50 or 60 flashes per minute
Q Q Continuous quick
Q 3 Group quick
IQ IQ Interrupted quick
Very quick repetition rate of 80 to 159 usually either 100 or 120 flashes per minute
VQ VQ Continuous very quick
107 VQ3
VQ 3 Group very quick
IVQ IVQ Interrupted very quick
Ultra quick repetition rate of 160 or more usually 240 to 300 flashes per minute
UQ UQ Continuous ultra quick
IUQ IUQ Interrupted ultra quick
109 Example
Mo K Morse Code
1010 FFl F Fl Fixed and flashing
1011 Example
AlWR 65
P of Lights and Marks
White only on sector and
111 W
alternating R Red
113 G Green
114 Bu Blue
115 Vi Y Y Or Y Am
Period in seconds and tenths of
12 25s 90s
a of Reference for Heights H Tidal Levels H
Elevation of light given in
13 12m
meters or feet
15M Light with single range
NOAA only lesser
1510M Light with two different ranges 1510M
14 of two ranges is
Elevation of light given in NOAA only least of
meters or feet three ranges is
Charted ranges are nominal ranges given in Nautical hor Horizontally disposed
vert Vertically disposed
P of a Full Light Marking Lights and Lights in Line
Leading lights with leading line
solid line is the track to be
201 followed and arcs of visibility
Bearing given in degrees and
tenths of a degree
Leading lights means lights
in line
202 Bearing given in degrees and
tenths of a degree
Leading lights on charts
Lines in line marking the sides
21 of a Rear Lt or Upper Lt Rear or upper light
23 Front Lt or Lower Lt Front or lower Lights
Direction light with narrow
sector and course to be
301 followed flanked by darkness or
unintensified light
P Lights
Direction light with course to be
302 followed sectors Direction light with narrow
fairway sector flanked by light
303 sectors of different characters
on standard charts
Direction light with narrow
fairway sector flanked by light
304 sectors of different character on
multicolored charts
Moir effect light day and
night arrows show when
31 course alteration Quoted bearings are always from Sector light on standard
Sector light on charts
Sector lights on standard charts
411 the white sector limits marking
the sides of the fairway
Sector lights on charts the white sector limits
marking the sides of the fairway
Main light visible allround with
42 red subsidiary light seen over
P Lights
Allround light with obscured
43 sector
Light with arc of visibility
44 deliberately Light with faint sector
46 Light with intensified with limited Times of Exhibition
Lights exhibited only when
specially needed for fishing
50 vessels ferries and some
private lights
Daytime light charted only
where the character shown by
51 day differs from that shown at
Fog light exhibited only in fog
52 or character changes in fog
Unwatched unmanned light
53 with no standby or emergency
temp Temporary
55 exting Lights
Flare Stack at Sea L Flare Stack on land E Signal Stations T
60 Aero light may be 69
P Lights
Air obstruction light of high
611 intensity eg on radio mast
Air obstruction light of low
612 intensity eg on radio mast
62 Fog Det Lt Fog detector light
Floodlit floodlighting of a
63 Strip light
Private light other than one
65 exhibited sync Synchronized National Symbols
a Riprap surrounding light
b ShortLong Flashing
c GroupShort Flashing
d Fixed and Group Flashing F Gp Fl
Unmanned lightvessel light
e float
LANBY superbuoy as
f navigational aid
Q Buoys and and Beacons
IALA Maritime Buoyage System which includes Beacons Q130
1 Position of buoy or of Buoys and Beacons
Supplementary national symbols l for Colors P
Green and black symbols filled
2 black
Single color other than green
3 and black
Multiple colors in horizontal
4 bands the color sequence is
from top to bottom
Multiple colors in vertical or
5 diagonal strips the darker color
is given first
Note material may be fitted to some unlit marks Charts do not usually show it Under IALA black
bands will appear blue under a Marks
Marks with Fog Signals R
Lighted marks on standard
7 charts
Lighted marks on multicolored
8 and Radar Application of Topmarks within the IALASystem Q130 For other topmarks special
purpose buoys and beacons Q
IALA System buoy topmarks
9 beacon topmarks shown
Beacon with topmark color
10 radar reflector and designation
Buoy with topmark color radar
reflector and Note Radar reflectors on floating marks usually are not of Common to Buoys and Beacons Q111
Conical buoy nun buoy ogival
20 buoy
21 Can buoy or cylindrical buoy
22 Spherical buoy
Q Buoys and Beacons
23 Pillar buoy
24 Spar buoy spindle buoy
25 Barrel buoy tun buoy
26 Light Floats
Light float as part of IALA
30 System
Light float not part of IALA
31 Buoys Supplementary
national symbols m n
Oil or Gas Installation Buoy L
40 Mooring buoys
Lighted mooring buoy
41 example
Trot mooring buoys with ground
42 tackle and berth numbers
Mooring buoy with or telephonic Numerous moorings
Visitors Purpose Buoys
Note Shapes of buoys are variable Lateral or Cardinal buoys may be used in some situations
Firing danger area Danger
50 Zone buoy
51 Target
52 Marker Ship
53 Barge
54 Degaussing Range buoy
55 Cable buoy
Q Buoys and Beacons
56 Spoil ground buoy
57 Buoy marking outfall
ODAS buoy Data collecting
58 buoy Data
Acquisition System
Buoy marking wave recorder or
59 current meter
60 Seaplane anchorage buoy
Buoy marking traffic separation
61 scheme
62 Buoy marking recreation Buoys
Buoy privately maintained
70 Seasonal buoy
Supplementary national symbols o
Lighted Beacons P Features Common to Beacons and Buoys Q111
Beacon in general
80 unknown or
chart scale too small to show
Beacon with color no topmark
Beacons with colors and
82 topmarks examples
Beacon on submerged rock with
83 colors topmark as Impermanent Marks Usually in Drying Areas Lateral Marks of Minor Pile P
90 Stake pole
Port Hand Starboard Hand
91 Perch stake
Port Hand Starboard Hand
92 Withy
Q Buoys and Marks Usually on E
100 Cairn
101 Colored or white mark
Colored topmark color known
1021 or unknown with function of a
Painted boards with of leading Towers
Beacon towers without and
110 with topmarks and colors
Lattice Purpose Lines Clearing Lines M
Note Topmarks and colors shown where scale Leading beacons
Beacons marking a clearing
121 line
Beacons marking measured
122 distance with quoted bearings
Cable landing beacon
123 Refuge beacon
125 Firing danger area Notice board
Q Buoys and Maritime Buoyage Association of Marine Aids to Navigation and Lighthouse Authorities IALA
IALA Buoyage Regions A and Lateral marks are generally for welldefined channels There are two international Buoyage Regions A and B where
Lateral marks Note A preferred channel buoy may also be a pillar or a spar All preferred channel marks have horizontal bands of color
Direction of Buoyage The direction of buoyage is that taken when approaching a harbor from seaward Along coasts the direction is
determined by buoyage authorities normally clockwise around land masses
Symbol showing direction of buoyage where not Symbol showing direction of buoyage on multicolored charts
Q Buoys and Beacons
Cardinal Marks indicating navigable water to the named side of the marks In the illustration all marks are the same in Regions A and Isolated
Danger Marks stationed over dangers with navigable water around Safe Water Marks such as midchannel and landfall Special Marks not
primarily to assist navigation but to indicate special National Symbols
a Bell buoy
b Gong buoy
c Whistle buoy
Fairway buoy red and white
d vertical stripe
Q Buoys and Beacons
Midchannel buoy red and
e white vertical stripe
buoy entering
f from seaward US waters
Porthand buoy entering from
g seaward US waters
Bifurcation Junction Isolated
h danger Wreck and Obstruction
i Fish trap area buoy
j Anchorage buoy marks limits
Triangular shaped beacons
l Square shaped beacons
Beacon color unknown
Mooring buoy with telegraphic
m Mooring buoy with telephonic
n Lighted beacon
q Security barrier
r Scientific mooring buoy
t White and Blue buoy
R Fog Detector Light P Fog Light P
Position of fog signal type of
1 fog signal not of Fog Signals with Abbreviations
Supplementary national symbol a
10 Explos Explosive GUN
11 Dia Diaphone DIA
12 Siren Siren SIREN
13 Horn Horn nautophone reed tyfon HORN
14 Bell Bell BELL
15 Whis Whistle WHIS
16 Gong Gong of Fog Signal The fog signal symbol is usually omitted when a
description of the signal is given
Siren at a lighthouse giving a
long blast followed by a short
20 one N repeated every 60
21 Waveactuated bell buoy
Light buoy with horn giving a
single blast every 15 seconds
22 in conjunction with a wave
actuated National Symbol
a Morse Code fog signal Mo
S Radar Radio and Satellite Navigation Structures Forming Landmarks E Radar Surveillance Systems M
Coast radar station providing
1 range and bearing service on
Ramark radar beacon
2 transmitting Radar transponder beacon with
31 morse responding
within the 3 cm X band
Radar transponder beacon with
32 morse responding
within the 10 cm S band
Radar transponder beacon with
33 morse Radar transponder beacon with
sector of obscured Radar transponder beacon with
sector of Leading radar transponder
beacons objects in line
Leading radar transponder
beacons coincident with leading
Radar transponder beacons on
36 floating marks
4 Radar reflector
5 Radar conspicuous Structures Forming Landmarks E Radio Reporting
Callingin or Way points M
Circular marine or aeromarine
S Radar Radio and Satellite Navigation Systems
Directional radiobeacon with
bearing line
Directional radiobeacon
coincident with leading lights
12 Rotating pattern Consol beacon
14 Radio station
Coast radio station providing
15 QTG service
16 Aeronautical Automatic System
171 AIS Automatic System
172 AIS transmitter on floating
marks Navigation Systems
World Geodetic System 1972
50 WGS WGS72 WGS84
or 1984
Note A note may be shown to indicate the shifts of latitude and longitude to one two or three decimal of places of a minute depending
on the chart scale which should be made to positions which are referred to WGS 84 to relate them to the chart to
relate them to the chart
Station providing DGPS
51 80
T Boarding place position of a
11 pilot cruising vessel
Boarding place position of a
12 pilot cruising vessel with name
eg District Port
Boarding place position of a
13 pilot cruising vessel with note
eg Tanker Pilots transferred by helicopter
Pilot office with pilot lookout
2 pilot lookout
3 Pilot office
Port with pilotage service
4 boarding place not shown
Coast Guard Rescue
10 Coast Guard station
Coast Guard station with
11 Rescue station
Rescue station Lifeboat station
12 Rocket station
13 Lifeboat lying at a mooring
Refuge for Stations
20 Signal station in general
Signal station showing
21 international port traffic signals
Traffic signal station Port entry
22 and departure signals
23 Port control signal station
24 Lock signal Bridge passage signal station
T Services
Bridge lights including traffic
252 signals
26 Distress signal station
27 Telegraph station
28 Storm signal station
Weather signal station Wind
29 signal station National Weather
Service NWS signal station
30 Ice signal station
31 Time signal Tide scale or gauge
Automatically recording tide
322 gauge
33 Tide signal station
34 Tidal stream signal station
35 Danger signal station
36 Firing practice signal National Symbols
a Bell on land
b Marine police station
c Fireboat station
d Notice board
e Lookout station Watch tower
f Semaphore
g Park Ranger station
U Small Craft Leisure Craft Leisure Features Bridges D Public Buildings Cranes F Pilots Coastguard Rescue Signal Stations T
11 Boat harbor Marina
Marina 83
V Index of A Br Breakers K 17
abt About Di br Brown J az
AERO Aero Aeronautical light P 60 brg Bearing B 62
Aero RBn Aeronautical radiobeacon S 16 brk Broken J 33
Aero RC Aeronautical radiobeacon S 16 Bu Blue P 114
Automatic S 171
System 172
Al Alternating P 1011 c Coarse J 32
ALC Articulated Loading Column L 12 C Can cylindrical Q 21
Am Amber P 118 C Cove O9
anc Ancient O 84 C Cape G7
N 20 ca Ca Calcareous J 38
ANCH Anch Anchorage
O 21
CALM Centenary Anchor Leg Mooring L 16
Ant ANT Antenna E 31 Cap Capitol Et
approx Approximate O 89 Cas Castle E 342
Apprs Approaches O 22 Cb Cobbles J8
Apr April cbl Cable B 46
Apt Apartment Es cd Candela B 54
Arch Archipelago G5 CD Chart Datum H1
ASL Archipelagic Sea Lane M 17 Cem Cemetery E 19
ATBA Area to be Avoided M 291 CG Coast Guard station T 10
Aug August L 401
Chem Chemical
auth Authorized K 462
Ave Avenue G 111 Chan Channel O 14
Ch Church E 101
B Ch Chocolate J ba
B Bay bayou O4 Chy CHY Chimney E 22
B Black Q2 Cir Cirripedia J ae
Bdy Mon Boundary mark B 24 Ck Chalk Jf
Bk Bank O 23 Cl Clay J3
bk Broken J 33 D 20 21
CL Clearance
26 28
bk Black J as
Bkw Breakwater F 41 cm Centimeters B 43
Bl Blue P 114 Cn Cinders Jp
bl Black J as Co Coralline algae J 10
BM Bench mark B 23 Co Company Eu
M 12 Co Hd Coral head Ji
Bn Bns Beacons P 45
Q 8081 constr Construction F 32
Bn Tr Beacon Tower P3 International Regulations for
Preventing Collisions at Sea
Bo Boulders J 92
Bol Bollard G 181 Co rf Coral reef O 26
cov Covers L 212
V Index of C contd Sensitive Sea
cps Cycles per second Bj
Corp Corporation Ev Est Estuary O 17
Cr Creek O7 exper Experimental O 92
CRD Columbia River Datum Hj Explos Explosive R 10
crs Coarse J 32 Exting exting Extinguished P 55
cs Cycles per second Bj
Cswy Causeway F3 F
Ct Ho Courthouse Eo f Fine J 30
Cup Cupola E 104 F Fixed P 101
Cus Ho Customs house F 61 Facty Factory Ed
Cy Clay J3 Fd Fjord O5
Feb February
D F Fl Fixed and flashing P 1010
D Destroyed O 94 FISH Fishing N 21
Dec December F Gp Fl Fixed and group flashing Pf
dec Decayed J an Fl Flashing P 104
Deg Degrees Bn fl Flood Hq
Destr Destroyed O 93 Fla Flare stack L 11
dev Deviation B 67 fly Flinty J ao
DG Degaussing Range Q 54 fm fms Fathoms B 48
DF Direction Finder fne Fine J 30
Differential Global Positioning Fog Det Lt Fog detector light P 62
System Fog Sig Fog signal R1
Di Diatoms J aa FP Flagpole E 27
DIA Dia Diaphone R 11 Fr Foraminifera Jy
Dir Direction light P 30 31 Fs FS Flagstaff E 27
dist Distant O 85 Fsh stks Fishing stakes K 441
Discol Discolored Ke
ft FT Foot Feet B 47 D 20
dk Dark J bd
dm Decimeters B 42 Fu Fucus J af
Dol Dolphins F 20
Dn Dns Dolphins F 20 G
M 271 G Gravel J6
DW Deep Water Track
N 124
G Green P 113
DZ Danger Zone Q 50 G Gulf O3
GAB Gab Gable Ei
E GCLWD Gulf Coast Low Water Datum Hk
E East B 10 Gl Globigerina Jz
ED Existence doubtful I1 glac Glacial J ap
EEZ Exclusive Economic Zone N 47 gn Green J av
Entr Entrance O 16 Govt Ho Government House Em
Gp Fl Group flashing P 104
V Index of G contd ISLW Indian Spring Low Water Hg
Gp Oc Group occulting P 102 Iso Isophase P 103
GPS Global Positioning System ITZ Inshore Traffic Zone M 251
Grd Ground Ja IUQ Interrupted ultra quick P 108
Grs Grass Jv IVQ Interrupted very quick P 107
GT Gross Tonnage
gty Gritty J am J
gy Gray J bb Jan January
Jul July
h Hard J 39 K
h Hour B 49 K Kelp Ju
H Helicopter T 14 kc Kilocycle Bk
HAT Highest Astronomical Tide H3 kHz Kilohertz Bh
Hbr Mr Harbormaster F 60 km Kilometers B 40
HHW Higher High Water Hb kn Knots B 52
F 34
Hk Hulk
K 21 22
Ho House G 61 L Loch lough lake O6
hor Horizontal disposed P 15 La Lava Jl
Hor CL Horizontal clearance D 21 Lag Lagoon O8
Hosp Hospital E g F 622 Large Automatic Navigational
hr Hour B 49 Buoy
hrd Hard J 39 Lat Latitude B1
ht Height Hp LASH Lighter Aboard Ship G 184
HW High Water Ha LAT Lowest Astronomical Tide H2
HWFC High Water Full Change Hh Ldg Landing F 17
Hz Hertz Bg Ldg Leading P 203
Le Ledge O 28
I L Fl Long flashing P 105
International Association of LLW Lower Low Water He
IALA Q 130
Lighthouse Authorities Lndg Landing F 17
International Hydrographic LNG Liquified Natural Gas G 185
Organization LoLo Loadon Illuminated P 63 Long Longitude
International Maritime LPG Liquified Petroleum Gas G 186
LS S Life saving station T 12
In Inlet O 10 lrg Large J ai
in ins Inches Bc Lt Lts Lights P1
Inst Institute En lt Light J bc
INT International A 2 T 21 Ltd Limited Er
Intens Intensified P 46 Lt Ho Light house P1
IQ Interrupted quick P 106
V Index of L contd N
LW Low Water Hc N North B9
LWD Low water datum Hd N Nun Q 20
LWFC Low Water Full and Change Hi NE Northeast B 13
National NGA
m Meters B 41 NM NMi Nautical miles B 45
m Minutes of time B 50 No Number N 122
m Medium in relation to sound J 31 National Oceanic and
Atmospheric Mud muddy J2
M Nautical miles B 45 NOS National Ocean Service
Ma Mattes J ag Nov November
mag Magnetic B 61 Np Neap tide H 17
Magz Magazine El NTM Notice to Mariners
Mar March NW Northwest B 15
Mc Megacycles Bl National weather service signal
Mds Madrepores Jj station
MHHW Mean Higher High Water H 13
MHLW Mean Higher Low Water H 14 O
MHW Mean High Water H5 OBSC Obscd Obsured P 43
MHWN Mean High Water Neaps H 11 Obs Spot Observation spot B 21
MHWS Mean High Water Springs H9 Obstn Obstruction K 41
Mi Nautical miles B 45 Oc Occulting P 102
min Minute of time B 50 Occas Occasional P 50
min Minimum K 462 Oct October
Mk Mark Q 101 ODAS Ocean Data Acquisition System Q 58
Ml Marl Jc Or Orange P 117
MLHW Mean Lower High Water H 15 OVHD Overhead D 28
MLLW Mean Lower Low Water H 12 Oys Oysters Jr
MLW Mean Low Water H4
MLWN Mean Low Water Neaps H 10 P
MLWS Mean Low Water Springs H8 P Pebbles J7
mm Millimeters B 44 P Pillar Q 23
Mn Manganese Jq P Preliminary NTM
Mo Morse P 109 PA Position approximate B7
MON Mon Monument E 24 Pass Passage Pass O 13
Ms Mussels Js Pav Pavillion Ep
MSL Mean Sea Level H6 PD Position doubtful B8
Mt Mountain Mount O 32 Pk Peak O 35
Mth Mouth O 19 PLT STA Pilot station T3
MTL Mean Tide Level Hf Pm Pumice Jm
Maintd Maintained P 65
MR Marine Reserves N 22
V Index of P contd Rf Reef O 26
Po Polyzoa J ad RG Radio direction finding station S 14
PO Post office F 63 Rk Rocks J 91 K b
pos posn Position Rky Rocky J 91
Post Off Post office F 63 R Lts Air obstruction lights P 612
Priv priv Private P 65 Q 70 R Mast Radio mast E 28
Prod well Production well L 20 RoRo Roll on Roll off F 50
PROHIB Prohibited N 22 R Sta Radio Station S 15
PSSA Particularly Sensitive Sea Area N 22 rt Rotten J aj
Pt Pteropods J ac R TR R Tr Radio tower E 29
Pyl Pylon D 26 R Tower Radio tower E 29
Ru ru Ruins D 8 F 331
Q RW Rotating pattern radiobeacon S 12
Q Quick P 106 RWVS Red and white vertical stripe Q d e
QTG Service providing DF signals S 15
Quar Quarantine Fe S
Qz Quartz Jg S Sand J1
S South B 11
R S Spar spindle Q 24
s Second of time B 51
R Radio Station S 15
SALM Single Anchor Leg Mooring L 12
R Red P 112 SBM Single Buoy Mooring L 16
R r Rock Rocky J 91 K b Sc Scanner E 303
Ra Radar reference line M 321 Sc Scoriae Jo
Ra Dome Radar dome E 304 Sch School Ef
Ra conspic Radar conspicuous object S5 Sch Schist Jh
Ra Antenna Dish aerial E 31 Sd Sound O 12
Racon Radar transponder beacon S3 SD Sounding doubtful I2
Radar Sc Radar scanner E 303 SD Sailing Tr SE
Southeast B 14
Radar tower E 302
RADAR TR sec Second of time B 51
Radome Radar dome E 304 Sep Radar marker beacon S2 sf
Stiff J 36
Ra Ref Radar reflector S4 sft Soft J 35
RBn Circular radiobeacon S 10 Sh Shells J 11
RC Circular radiobeacon S 10 Shl Shoal O 25
Rd Roads roadstead G 110 Si Silt J4
Rd Radiolaria J ab Sig Signal R1
rd Red J ay Sig Sta Signal station T 20
RD Directional radiobeacon S 11 SL Fl ShortLong Flashing Pd
RDF Radio direction finding station S 14 SM Sand over mud J 121
Ref Refuge Q 124 sml Small J ah
Rep Reported I3 Sn Shingle Jd
V Index of S contd U
so Soft J 35 ULCC Ultra Large Crude Carrier G 188
Sp Spring tide H 16 Uncov Uncovers K 11
SP Spherical Q 22 unev Uneven J bf
Sp spire E 103 Univ University Eh
Spi Spicules Jx UQ Ultra quick P 108
Spipe Spipe Standpipe E 21 us Bf
Spg Sponge Jt usec Bf
spk Speckled J al
SPM Single Point Mooring L 12 V
SS Signal station T 20 v Volcanic J 37
St Stones J5 var VAR Variation B 60
stf Stiff J 36 vard Varied J be
stk Sticky J 34 vert Vertically disposed P 15
F 411 vel Velocity Hn
Sta STA Station
S 15 T 3
Vert CL Vertical clearance D 20 28
Stg Seatangle Jw Vi Violet P 115
Str Strait O 11 Vil Village D4
Str Stream Hl VLCC Very Large Crude Carrier G 187
str Streaky J ak vol Volcanic Volcano J 37
St M St Mi Statute miles Be Vol Ash Volcanic ash Jk
sub Submarine Kd VQ Very quick P 107
Subm Submerged K 431 VTS Vessel Traffic Service
SW Southwest B 16
sy Sticky J 34 W
W West B 12
T W White P 111
T True B 63 Wd Weed J 131
t Tons Tonnage weight B 53 Well Wellhead L 21
T Telephone Eq WGS World Geodetic System S 50
T Short tons Bm Wh White J ar
T Tufa Jn Whf Wharf F 13
Tel Telegraph D 27 WHIS Whis Whistle R 15
Tel off Telegraph office Ek Wk Wreck K 20
Temp temp Temporary P 54 Wtr Tr WTR TR Water tower E 21
ten Tenacious J aq
Tk Tank E 32 Y
E 102 P 116
Tr TR Tower Y Yellow Orange Amber P 117
E 20
P 118
TSS Traffic Separation Scheme M 201 yd yds Yards Bd
TT Tree tops C 14 yl Yellow J aw
TV Mast Television mast E 28
TV Tower Television tower E 29
W International A M 271
DW Deep Water track
N 124
Aero Aeronautical light P 60 611
Aero RC Aeronautical radiobeacon S 16 DZ Danger Zone Q 50
Automatic S 171
System 172
Al Alternating P 1011 E East B 10
ALC Articulated Loading Column L 12 ED Existence doubtful I1
Am Amber P 118 EEZ Exclusive Economic Zone N 47
ASL Archipelagic Sea Lane M 17 Explos Explosive R 10
exting Extinguished P 55
B Black Q2 F
bk Broken J 33 f Fine J 30
P 45 F Fixed P 101
Bn Beacons
Q 80
FAD Fish Aggregating Beacon tower P 3 Q 110 FFl Fixed and flashing P 1010
Bo Boulders J 92 Fl Flashing P 104
Br Breakers K 17 Fla Flare stack L 11
Bu Blue P 114 Fog Det Lt Fog detector light P 62
FS Flagstaff flagpole E 27
C ft Foot Feet B 47
c Coarse J 32
ca Calcareous J 38 G
CALM Cantenary Anchor Leg Mooring L 16 G Gravel J6
Cb Cobbles J8 G Green P 113 Q 2
cd Candela B 54 GPS Global Positioning System
CG Coast Guard station T 10 grt Gross Register Tonnage
Ch Church E 101 GT Gross Tonnage
Chy Chimney E 22
cm Centimeters B 43 H
Co Coraline Algae J 10 K 16 h Hard J 39
Consol Consol Beacon S 13 h Hour B 49
Cy Clay J3 H Helicopter T 14
hor Horizontal disposed P 15
DG Degaussing Range N 25 Q 54 I
Differential Global Positioning INT International A 2 T 21
Intens Intensified P 46
Dia Diaphone R 11 IQ Interrupted quick P 106
Dir Direction light P 3031 Iso Isophase P 103
dm Decimeters B 42 IUQ Interrupted ultra quick P 108
Dn Dns Dolphins F 20 IVQ Interrupted very quick P 107
W International J NT Net Tonnage
Jan January NW Northwest B 15
Jun June
Jul July O
Obscd Obscured P 43
K K 4043
Obstn Obstruction
L 43
km Kilometers B 40
kn Knots B 52 Oc Occulting P 102
occas Occasional P 50
L Data
Acquisition System
LANBY Large Automatic Navigational P6
LASH Lighter Aboard Ship G 184 Or Orange P 117 Q 3
Lat Lattitude B1
LAT Lowest Astronomical Tide H2 P
Ldg Leading P 203 P Pebbles J7
LFl Longflashing P 105 PA Position approximate B7
Lndg Landing for boats F 17 PD Position doubtful B8
LNG Liquified Natural Gas G 185 priv Private P 65 Q 70
Long Longitude B2 Prod Well Submerged production well L 20
LPG Liquefied Petroleum Gas G 186 PSSA Particularly Sensitive Sea Area N 22
Lts Lights P1 Pyl Pylon D 26
M Mud muddy J2 Q Quick P 106
M Nautical miles B 45
m Meters B 41 R
m Minutes of time B 50 Coast radio station providing
R S 15
QTG service
m Medium in relation to sand J 31
min Minutes of time B 50 R Red P 112 Q 3
Mk Mark Q 101 R Rock Rocky J91 K 15
mm Millimeters B 44 M 3132
Ra Radar
P 109
Mo Morse Code
R 20 Racon Radar transponder beacon S 3136
Mon Monument E 24 RC Circular marine radiobeacon S 10
MR Marine Reserves N 22 RD Directional radiobeacon S 11
Maritime Rescue Coordination Q 124
MRCC Ref Refuge
Center T 14
Rep Reported but not confirmed I 3132
N RG Radio direction finding station S 14
N North B9 RoRo Rollon Rolloff RoRo Terminal F 50
NE Northeast B 13 D 8
Ru Ruins E 252
No Number N 122 F 33
RW Rotating pattern radiobeacon S 12
W International S W
S Sand J1 W West B 12
s Seconds of time B 51 P 12 P 111
W White
Q 1305
S South B 11
SALM Single Anchor Leg Mooring L 12 Wd Weed J 131
SBM Single Buoy Mooring L 16 Well Wellhead L 21
SD Sounding doubtful I2 WGS World Geodetic System S 50
SE Southeast B 14 Whis Whistle R 15
sec Seconds of time B 51 Wk Wks Wrecks K 2030
sf Stiff J 36
Sh Shells J 11 Y
Si Silt J4 P 116
Y Yellow Orange Amber P 117
Sig Signal T 252 P 118
SMt Seamount O 33
so Soft J 35
Sp Church spire E 103
SPM Single Point Mooring L 12
SS Signal station T 2036
St Stones J5
SW Southwest B 16
sy Sticky J 34
t Tons Tonnage weight B 53 F 53
temp Temporary P 54
E 102
Tr Tower
E 20
ULCC Ultra Large Crude Carrier G 188
UQ Ultra quick P 108
UTC Coordinated Universal Time
UTM Universal Transverse Mercator
v Volcanic J 37
vert Vertically disposed P 15
Vi Violet P 115
VLCC Very Large Crude Carrier G 187
VQ Very quick P 107
VTS Vessel Traffic Service
X Index
A Astronomical 23 20 Blind duck K jk
Abysssal hill 37 Atoll 6 Blockhouse E 342
Abyssal 49 Authorized overhead clearance D 26 P 114
Aerial dish E 31 Automatic fog 2022 Board painted 1022
Aerial cableway 25 Automatic System transmitter Boarding place pilot T 1
Aero light P 60 S 171172 radiobeacon S 16 G 111 harbor 11 U airport 17 Awash rock K 12 a
hoist lift topographic terms G 116118 B 181
Air obstruction light P 61 Band X S S 3133 Boom 178
Air traffic G 116118 O 23 U 14 Borderland O 47
AIS 171172 Bar A d Border scale A 14
Alongside depth 11 Barge 53 Boulder G 28 J c Barrage flood F 43 Boundary international light P 1011
Barrel 25 Boundary mark B 24
Amber P 118 Barrier 178 Breakers d K 17
Anchor berth N 11 Barrier 130 F 1021 O 21 Bascule bridge D 234 Brick kiln works G 81
Anchorage area N 11121 Baseline Territorial Sea N 42 2224 prohibited 20 Basin 2728 G 134 O 48
suspension G 114
Ancient 84 E 343 lights traffic signals T 251 252
Annual change B 66 4 Broken E 31 4 J az
Anomaly local magnetic B 82 111 Q 80126 Buddhist temple E 16
Apartment E s buoyant resilient P 5 Building D 18 G 60
Apparent shoreline p Consol S 13 harbor 22 P 4 slip 89 radar S 23 topographic 6098
depth I 31 1016 172
height contour 12 tower 3 Q 110 Bunker 174
position B 33 B 62 Buoyage system IALA 130
vertical D i Bell 14 T a 171
Apron 59 Bell buoy R 21 Q a Buoy dump Sea Lane M 17 B 23 Buoyant P 5 Berth
O 82
Area to be M 14 29 N 11 Buried pipe pipeline 42
Area 20 designation F 19 C o G 37
Arm of the Sea 6 U 2 C
Articulated Loading Platform L 12 yacht U 12 Cable B features F 16 Bifurcation buoy h buoy Q island L
15 Bird sanctuary N 22 23 20 Black J as Q 2 landing beacon 123
X Index
C contd Chemical dumping ground N 24 Conspicuous landmark
Cable contd Chemical 401 Conspicuous on S 5
overhead 27 E 22 Construction works F 32
L 3032 ba Container crane F aerial 25 Church E 10 Container 152
Cairn 100 p Contiguous Zone N 44
Caisson F 42 ae 38 50 borderland O point M 40 3 rise O 46
Calvary E 12 Clearance N 46 O 42
Camping site E 36 D 21 slope O F 40 G 132 safe vertical D 26 i Continuous flashing P 10
Canal distance mark F 40 vertical 20 2228 Contour
Can 21 Cleared platform 22 depth I B 54 Clearing line 2 drying 55 Clearing line beacons
121 line C 10 12
Cape 7 Cliffs C 3 Control B E t 87 Convent e G 76
Camping site recreational vehicles F 371 372 Coal J i Conversion scales A a
Cardinal 1303 Coal harbor 154 Conveyor 182
Cargo transhipment area 64 Coarse 32 Cooling water E 342 G 64 Coastguard T 1011 Copyright A
316 Coast Coral J 10 22 K 16 h
Cathedral 75 coastline 18 Corner coordinates A 9
Causeway F 3 topographic terms 113 Corporation E v
Cautionary A 16 Coast radar S 1 Courthouse E 3 Coast radio station QTG S 15 Cove 9
Cement works 82 8 Covers K 1011 16 21
Cemetery E 19 86 Crane F B 43 Color of beacon 25 Creek 7
Chalk f Color of lights P 11 Crib K 14 Colored mark 101 Cross E 12
dredged I 2123 E 24 G 66 Crossing gates traffic separation 22
I 23 Commercial 147 Crossing traffic separation E 11 E u Cubic meter B light P 10 Compass A c B
70 Composite light P 10 C l
A 3 H 1 20 Conical buoy 20 shellfish K 47
limit larger scale A 18 Conifer coniferous C 313 j Cultural features D
number 12 Coniferous woodland 39 Cupola E 104
scale A 13 Consol beacon S 13 4243
title A 10 Current meter Q 59
X Index
C contd Degreee B 4 n Dock
Customs 18 dry graving F 25
144 floating F 2627
48 Depth F 2021
F 61 contours 30 Dome E A 6 minimum 272 Doubtful
Cut 32 I 24 K 2 depth 14 Derrick oil 10 existence 1
Cycles per second B j Designation of B 21 beacon or
1011 Draw bridge D r berth F 191 N 11 Q 42 Dredged area channel I 2023
D in fairways 2023 a c Dredging area N 63
Dam F 44 reporting point 40 Dry F 25
Danger 93 Drying contour 30
area 125 Detached coral K h Drying 15
areazone 50 Detector P 62 Duck blind K jk
firing 30 Development 4 Dumping ground 2324 e d g
isolated marks 1304 Deviation dolphin F 21 Dunes C 8
K 1 Deviation magnetic B 67 F 1
reported I 34 DGPS station S 51 E
signal T 35 Diagonal color stripes 5 B 10
Dangerous K 13 R 11 East cardinal mark wreck K 28 aa Ebb tide H 41
Dark bd 43 H 45
Data collection 58 Dimensions A 8 Edition A 5
Datum station S 14 Electric G 89
A 3 H 1 20 Direction lights P 30 Elevation of light 20 P 13
land survey 7 20 Direction of buoyage 1302 D 8083 110 Directional radiobeacon S 11 Entrance
O 16
Daytime light P 51 Discharge pipe 41 Entry prohibited area N 22 N an Discolored water K e Sensitive Sea Areas
N 22
Deciduous 311 Dish aerial E 31 O 61
Deciduous C i G 38 Disposition of lights P 15 Established direction of traffic 10 B 42 Distance mark B 25
O B 64 Distance B Eucalyptus C K 432 85 Evergreen C 312
Deep water Distress signal station T 26 Exclusive Economic N 47
124 Disused Exercise area submarine N 33
harbor 142 32 Existance doubtful 1
route M 51 27 44 O 25 platform 14 Explanatory notes A 11 range buoy 54
X Index
E contd Fixed
Geographical positions B bridge D 22 Glacier C 25
anchorage area 127 flashing P 1010 f ap
dumbing ground 23 light P 101 Globigerina J z
fog signals 10 point B 22 A light P 55 5 Gong Q b R 65 Flagpole E 27 G 33
F Flare stack E 23 L 11 Government house E m
Factory E d G 80 Flashing P 104 Grain 151
Faint sector P 45 Flat coast C 5 Grass u
Fairway safety M 18 Flinty ao C m
Fairway lights 2041 Floating Grassland G 58 29 G 178
Gravel C c J 53 dock F 26 Graving F 25
Farm fish marine K 48 P 6 Gray bb
Fast ice limit 601 Flood H q J av P 113 Q B 48 Flood F 43 Greenhouse G 84
Fence g Flood tide stream H 40 Greenwich B M 5051 Floodlight 70 Gridiron F 24
155 Floodlit structure P 63 Gritty J am
P 50 Fog Groin F 6
terminal RoRo F 50 detector light P 62 a
Filao 317 light P 52 Ground tackle Q 42
Fine 30 signals R Group light P 10 e
Firing danger 30 C c Groyne F 6
beacon 125 Foot B 47 Gulf 3
buoy 50 D e G 115 Gulf coast low water datum H k
Firing practice signal T 36 J y Gulf stream limits H q
Fish Form lines C 13 Gully tidal O 67
cages farm K 484 Fort fortified E 34 Gun R 10
haven K 46 Foul K 31 o H
trap weir K 44245 Q i Fracture 60 Hachures C f
Fishery 45 Free port 143 138
Fishing Front light P 23 installations F 10 G 170187
harbor F 10 Full moon H s N 49
light P 50 G Masters office F 60
prohibited 21 Gable E i 130189
K 441 Gap 63 Hard 39
village 52 Gas Haven 139
40 Head headland 8
90 2028
Gasfield 1 Health F 621
Gate F 42
X Index
H contd Inner harbor 140 Landmarks 8 C 1014 E 45 H p
Inshore Traffic Zone 25 Lane submarine transit N 33
Height of light H 20 P 13 offshore J landing 118 Large Automatic Navigational Buoy P 6 b Q 26
Hertz B g Institute E n G 74 Lateral marks IALA 1301
Higher High 3 20 b Intake 177 L 411 Latitude B 1
High Water 520 a Intensified P 46 Lattice beacon Q Full and Charge h Intermittent river C 21
Lattice tower G 68
Highest Astronomical Tide 3 20 International Lava C 26 J l
Highway markers a W Layered 121
Hill 27 boundary 4041 Layout of chart 4 chart number A 2 26 Meridian Greenwich B 3
50 Nautical B 45 P Interrupted light P 10
clearance 21 Intertidal area 2022 Least depth in narrow 12
color bands 4 Island islet 12 O 28
lights P 15 artificial 15 Leisure Facilities U
Horn 13 Isogonal B 71 Lesser O 86
Hospital g F 622 Isolated danger mark 1304 Levee 1 O 96 98 Isophase P 103 Lifeboat mooring T 13
Hour B 49 J Lifeboat station T 61 Jetty F 14 ac
Lifting bridge D 34 K 21 23 K Light J bc
Hut 62 13 Lights P
Hydraulic structures F 163 B k character P 10
Hydrographic terms 67 Kilohertz B h color P 11
Topographic G 130136 B 40 P Knoll 36 direction P 3031
I Knots 52 H o disposition P 15
IALA Buoyage System 130 L P 13
Ice front limits 6 Lagoon C h G 13 O 8 in P 21
Ice signal station T 30 Lake C 23 O 6 landing G P 63 LANBY P 6 Q 26 on landmarks P 7
Imprint A 3 Land survey datum H 7 20 leading P 20
In line 12 P 2021 Landing F 17 major floating P surveyed I 25 area seaplane N 13 marking
fairways P area 65 beacon cable 123 off chart P 8
Increasing B 65 lights G 117 moir effect P 31
Indian Spring Low Water g site G 118 period P harbor 146 stairs steps F 18 P 14
Inlet 10 P c
X Index
L contd Lower P 23 Maximum draught on track 6
Lights contd Lowest Astronomical Tide H 2 20 Maximum speed N 27
sector P 40 M Mean Sea H 6 20
special 6065 Machine 93 Mean Tide Level H 2 f
structure 15 J j Measured distance 122
synchronized P 66 Magazine E l Median O 54
times of exhibition P 50 Magnetic B 61 Medium 31
Light float major P 6 anomaly B 82 B l
Light float minor Q 3031 B 6082 Bi
Light vessel P 6 a variation B 6071 B 41
Lighted 81 Maintained 23 Microsecond B f
beacon P 34 Q o Major floating lightl P 6 Midchannel buoy e
marks Q 78 Major light P 1 Mile nautical sea B 45
mooring buoy 41 Manganese q Mileage Mark F 40
offshore platform P 2 Mangrove C 32 Military practice Aboard Ship LASH 184 E 18 Mill G P 1
Marginal notes A Millimeter B 44
Limited r Marina F 111 U 11 E Marina facilities b U 32 Mine E 36
airport g Marine K 48 Minelaying practice N 32
danger line K 1 Marine N 22 Minefield N 34
dredged I 2023 Maritime N 1 Minimum depth on route 272
fishing N c Marks Minor
gasfield L 3 cardinal 1303 light P 1
Gulf Stream d colored 101 marks 90102
restricted area 14 N 2 20 B 25 post F 22
routing measure M 15 isolated danger 1304 Minute B 5 50
unsurveyed area I 25 lateral 1301 Mixed bottom 122
Linear 1314 lighted 78 O 57
Liquified Natural Gas 185 minor 90102 Moir effect light P 31
Liquified Petroleum Gas LPG 186 safe water 1305 Mole F 12
Local Magnetic Anomaly B 82 1306 Monastery G 76
Location station T e 101 E 24
Loch 6 Marked 83 Moored storage 17
Lock F 41 Marker Ship Buoy 52 12
Lock signal station T 24 Marl J c berth 42
Log pond 61 Marsh C 33 canal F P 105 Mast 67 ground tackle Q 42
Longitude B 2 mooring 69 life boat T 13
Lookout T 2 E 301 mast G 69
Lookout G 77 T e radio television E 28 numerous Q 44
Lough 6 K 25 Q 42
Low Water 420 ce i Mattes ag visitors Q 45
X Index
M contd North B 9 Opening bridge D 231
Mooring buoy 40 North cardinal 1303 J ax P 117
41 Northeast B 13 Ore harbor 150
tanker 16 Q 26 B 15 Outer harbor 141
m A 11 16 Outfall 411
n Notice 126 T d buoy Q 57
Morse Code Notice to A 6 cooling 177
P 109 Number anchorage berth F 19 N 1112Q 42 H 44
fog a Numerous 44 E 17 New Edition A 5 cable D 27
Motorway 10 O pipe D 28
Mount Mountain 23 O 32 Obelisk E 24 D 25
Mouth 19 Obscured P 43 Oysters r
Mud 2 Observation 13 P
Multistory building 63 Observation B 21 Pack ice N 602
Muslim E a Observatory 73 Paddy field G s K 4048 Pagoda E 14
N Obstruction light air P 61 Painted board 1022
Named anchorage area 123 Occasional P 50 C 15 Occulting light P 102 Park Ranger station T g
National 4049 Ocean 1 Particularly Sensitive Sea Area PSSA N 22
National park 22 Ocean current H 43 O 88
Natural features Ocean Data Acquisition System O 13
Natural inland features G 2039 ODAS Buoy 25 Q 26 58 Parent F 23
Natural I 16 72 Path D 12
Nature reserve 22 F 61 Pavilion E p
Nature of the C 13 59 Harbor Masters F 60 G 25 O 35
Nature of the seabed F 621 7
Nautical mile B 45 pilot T 3 Peninsula 4
Nautical mile b Offshore installations Perch Q 13 Offshore platform P 2 Period of P 12
Naval 145 Offshore position tidal levels H 47 Pictorial E 31
Naval 79 Ogival buoy 20 Pier F 78 Oil
F 15
Neap tides 1020 F 29 ruined F 332
Nets tunny K 442 derrick 10 Pile 22 G 179
New Edition A 5 149 row of 180
Nipa palm 315 installation buoy 16 submerged K 43
No Anchoring 20 401 E 24
No bottom found I 13 Oilfield w name 1 Pillar buoy Q K 29 Oily wastes reception facilities radiobeacon S 10
Oneway 51 basin F 27 Ooze b
X Index
P contd Power
Radar S 15
Pilot cable 31 beacon transponder S 23
boarding T 1 transmission line D 26 h conspicuous S 5
helicopter transfer 14 station 88 dome mast scanner E 30
T 2 Practice area military 3034 31
T 23 Precautionary 16 24 reference line 32
Pilotage T 14 Preferred channel 1301 reflector 1011 S 4
Pinnacle 29 Private buoy 70 station S 1
Pipe pipeline L 4044 Private light P 50 65 surveillance M 3032
buried F 421 Production 10 Radio S 1016
land 29 Production 20 station S 14
overhead 28 Prohibited mast tower E 2829
tunnel L 422 anchoring N 20 reporting line point 30 O 39 22 31 station QTG service S 2 10 1314 22 P 2
N 21 S K l 80 9 Promenade pier F 15 Radome E 30
B 22 Promontory 20 Rail G 110118
radio reporting M 40 Province 66 Railway railway D 13 b
symbols B 32 J ac Ramark S 90 Public Ramp F 23
Police 156 F 6063 Range G 21
Polyzoa ad Publication note A 4 C F 16 Pumice m Rate current H n
Pontoon 235 Pump 93 G F Pumpout F f Rear light P 22
Port control signal T 23 Pylon D 26 Reception facilities oily wastes buoy g 65 Reclamation 31 G 136
Position B 22 Q Recommended
approximate B 7 QTG S 15 direction of traffic flow M 11 26 a
beacon 1 Quarantine anchorage N 128 281
doubtful B 8 Quarantine F 621 g track M 34 6
fog 1 Quarry E 35 Recreation zone Q 62
116 Quartz g Red J ay P 112 Q 3
pilot cruising vessel T 1 Quay F 13 Reed R 13
tidal 30 46 Quick light P 106 Reef 22 K 16 g O systems S R
Reference to
Post F 22 H 44 adjoining A 19
F 63 S 3 charted units A b
submerged K 43 largerscale chart A 18
Refinery G 87
Reflector radar 1011 S 4
Refrigerated storage house G 86
X Index
R contd Safety fairway 18 Sector Q 124 T 14 Safety zone 3
obscured P 43
Relief 1014 Sailing 113 restricted P 44
Reported anchorage 10 Sailmaker U 8 Semaphore T f
Reported depth I 34 Sailors home 97 Separation Radio M 40 54 Separation M 1013 201292 df
Rescue station T 1112 Salt pans C 24 Separation 13 20
Research L 13 Saltings salt C 33 G 12 D 18 G line h 1 Sewage works G 92
Reserve fog signal 22 Sandhills Sand dunes C 8 41
Reserved anchorage area 129 Sandwaves 14 C 135 Sandy C 6 Shapes beacon P 5 Satellite navigation
S 50 Shed F 14 N 21 Scanner radar E 303 F light sector P 44 61 6 Schist h
Shellfish bed K 22 O 30 School E f G 78 Shells J 11
Riprap surrounding light P c o 31 46 Scrubbing F 24 Shingly shore C 2021 2 Shinto E 15
Road 1012 ice limit N 602 Ship lift 131
topographic terms 110111 113115 loch 6 189
Road G 110118 mile B 45 K b O 25
Roads O 20 moat 57 O G 11 J 91 K 1015 n Seabed types of Shore 18 q
Rock awash K a Sea channel 56 U 21
Rocky 21 A 12 Side arm O 68
Rocket station T 12 Seal sanctuary N 22 Signals fog 122 a
Rollon Rolloff RoRo ferry F 50 3334 Signal station T 2031 pattern S 12 Seaplane
Sill O traffic separation M 21 de anchorage N 14 E 33
Route M 2728 anchorage buoy 60 4
Routeing measures M 10292 ab landing area N 13 Single Buoy Mooring SBM 16 Q 26
Row of piles 180 Seasonal sea ice limit N 602 Single Point Mooring SPM e Seasonal buoy 71 K 8 F 33 J w
Siren R 12
Runway 116 Seawall F 2 Sketches E 32
S B 6 51 64 Sector
Slipway 23 U 5
Safe clearance depth K 3 faint P 45 4445
Safe vertical D 26 H 20 P 46 Sluice 133
Safe water marks 1305 P 4041 ah
X Index
S contd Stations cont
Suspended well 21
Small craft facilities T 2036 Suspension bridge G K 43 storm T 28 C 35 buoy f Swept 12
Statute mile B e I 24 b K 2
Soundings I 124 Steep coast C 3 channel a
Sources diagram A 17 Steps 18 U 7 Swing bridge D B 11 Sticky 34 Swinging N 112
South cardinal mark 1303 Stiff 36 Symbols in plan B B 14 Stock number A d Symbols in profile B 31
Southwest B 16 Stones 5 Symbolized positions B 3033
Spa hotel 98 Stony shore C 7 T
Spar buoy 24 Storage 183 L 17 Tableland G 29
Special lights 6065 85 Tablemount O 38
Special 1306 O 11 Tank E 32
Special purpose Q 5062 p Stranded wreck K 2021 24 purpose Q 120126 Streaky J ak
anchorage N al Stream 20 H l cleaning 176
Speed limit 27 Street D 7 G 110 mooring buoy 16 Q 26
Spherical buoy 2 Strip light P 64 storage 183 L 17
Spindle buoy 2 Stumps K 43 Tap water U x Submarine
Target buoy Q E 103 cable L 3032 10 exercise area N 33 line D 27
Spoil ground 62 L 4044 office G 95 k
Spoil ground buoy 56 transit N 33 station T t K d Telephone D 27
Spot heights 1113 90 Telephone q U 25
Spring seabed 15 crib K i Telephonic mooring Q 43
Spring tides 820 duck K k Televison mast tower E 41 jetty F b Temple E 1316
Square meter B a platform K l Temporary light P 54
Square shaped beacons l rock beacon on 83 aq
Stake K 441 Q 9091 well a Terminal 170
Stations Subsidiary P 42 O 40
bunker 174 24 Territorial Sea limit N 43
coastguard T 1011 Sunken Territorial Sea straight baseline N 42
coast radar M 30 S 1 danger swept K f Three Nautical Mile Line N b
coast 1415 rock 27 Tidal
fuel 18 K c 130
77 L 16 P 6 Q 26 58 basin F 28
railway 13 Supply 40 O 67
rescue T 1113 Surveyed C 1 F 28
X Index
T contd Traffic surveillance 30 Underwater installations L 2024
Tidal level 130 Trailer park U 28 Underwater rock K 1115
station 47 Training wall F 5 Underwater turbine 24
table 30 Tramway G 112 Uneven bf
Tidal stream 3147 lo Transhipment facilities F 5053 Unexploded K p
ebb flood 4041 Transhipment N 64 b B 4054
46 Transit 2 Unknown extent K g
signal station T 34 lane N 33 Unmanned unwatched light P 53 a
table A g H 30 shed F 51 Transmission line 2627 h
gauge T 32 Transmitter AIS S 171172 C 2
rips 44 Transponder S 3 K 2830
signal station T 33 Transporter bridge D 24 Upper light P 67 Transporter overhead for cables D 25 Urban
D 1
Timber 153 Trap fish K 44245 V
Timber yard F 52 Travelling crane F 531 Valley 31 O 5334
Times 4951 Trees Variable arrow light P 31
Time signal station T 31 height to top C 14 B 60 23 types C 3132 ik be
Tomb E b 51 C 3033 ir G 34
Ton tonne tonnage B 53 m Triangular shaped beacon Q l Velocity H n
Topmark 911 1021 Triangulation point B 20 terms Trot 42 clearance 20 2228
Tower E 20 52 color 5
beacon P 3 Q 110 True compass B 63 P 15
church E 102 n Very Large Crude Carrier 187
68 Ton buoy 25 Very quick P 107
E 302 Tunnel D 16 L 422 Vessel P 6 a Q 31
radio television E 29 Tunny nets K 4445 Viaduct f G 113
77 E 261 L 51 24 Views E 32
water E 21 Turning 69 Village D 4 G 50 Turning basin 69 115 J at
Town Hall 71 Turning circle 69 Visitors berth mooring F 192
Track 12 M 16 27 Twoway 272 282 Volcanic 37
Trade 147 Twoway track 4 Volcanic J k
Traffic road rail air G 110118 Tyfon R 13 Volcano G 26
Traffic flow direction M 1011 26 Types of W
Traffic Separation Scheme TSS M 1025 U Wall
training F 5
buoy 61 Ultra quick light P 108 51 G 85
M 201292 f Ultra Large Crude Carrier ULCC 188 Watermill E c
structure M 1013 df K 1121 h Watch tower G 77
Traffic T 2122 252 Under construction reclamation F 3032
X Index
W contd Well E e G 94 Works in progress F 3032
Water head 23 World Geodetic System WGS 3 S 50
K e production 20 K 2031
features 2025 submerged a buoyed h
83 suspended 21 N 26
pipe pipeline L 4041 B 12 Y
31 west cardinal mark 1303 Yacht berth harbor 112
tap 17 Wet dock F 27 Yacht club 113
tower E 21 Wharf F 13 Yards B d
91 Whistle R 15 22 Whistle buoy Q c 172
Wave L 6 ar P 111 buoy 173
Wave recorder 59 White 101 timber F fog 2122 Wind E 262 L 5 aw P 116 Q 3
Way point M 40 Wind signal T 29 Z
Weather signal T 29 Windmill E 25 131 E 26 Exclusive Economic N F 44 Wind E 261 L 51 frishing N
Weir fish K 442 Wire drag sweep I 24 K 2 O 60
Withy 92 inshore traffic 25
Woodland woods C 30 G 3839 seaward contiguous N 44
8192 separation 13 20 e
Appendix 1
IALA Maritime Buoyage System
Lateral Marks Region A
Port Hand Starboard Hand
Color Red Color Green
Buoy Cylindrical can pillar spar Buoy Conical nun pillar spar
Topmark if any Single red cylinder can Topmark if any Single green cone point upward
Lights if any may have any phase other than that used for preferred channels
Q Fl
L Fl
G Fl
Preferred Channel to Starboard Preferred Channel to Port
Color Red with one green horizontal band Color Green with one red horizontal band
Buoy Cylindrical can pillar spar Buoy Conical nun pillar spar
Topmark if any Single red cylinder can Topmark if any Single green cone point upward
Lights if any are composite group flashing
Fl 21
Appendix 1
IALA Maritime Buoyage System
Lateral Marks Region B
Port Hand Starboard Hand
Color Green Color Red
Buoy Cylindrical can pillar spar Buoy Conical nun pillar spar
Topmark if any Single green cylinder can Topmark if any Single red cone point upward
Lights if any may have any phase other than that used for preferred channels
Q Fl
L Fl
G Fl
Preferred Channel to Starboard Preferred Channel to Port
Color Green with one red horizontal band Color Red with one green horizontal band
Buoy Cylindrical can pillar spar Buoy Conical nun pillar spar
Topmark if any Single green cylinder can Topmark if any Single red cone point upward
Lights if any are composite group flashing
Fl 21
Appendix 1
IALA Maritime Buoyage System
Cardinal Marks Regions A B
Buoy Pillar or spar
Topmark when practicable always fitted
Lights if any may have any phase other than that used for preferred channels
Appendix 1
IALA Maritime Buoyage System
Isolated Danger Marks
Color Black with one or more red horizontal bands
Buoy Optional but not conflicting with latteral marks pillar spar preferred
Topmark if practical always fitted with double spheres
Lights if any white group flasing Fl 2
Safe Water Marks
Color Red and white vertical strpes
Buoy Spherical pillar or spar with spherical topmark
Topmark if any Single red sphere
Lights if any white Iso
L Fl 10s
Morse A
Special Marks
Color Yellow
Buoy Optional but not conflicting with latteral marks
Topmark if any Single yellow X shape
Lights if any yellow but not conflicting with white lightsl Fl Y
Fl 4 Y
Contents Key
GENERAL A Chart Number Title and Marginal Notes
Positions Distances Directions and
C Natural Features
D Cultural Features
E Landmarks
F Ports
G Topographic Terms
Tides H
I Depths
J Nature of the Seabed
Rocks Wrecks and
L Offshore Tracks and
N Areas and Limits
O Hydrographic AIDS P Lights
Buoys and
R Fog Signals
Radar Radio and Satellite Navigation
T Services
U Small Craft Leisure V Index of W International X 1 IALA

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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 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 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.