C-Map Chart Legend [PDF]

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This Chart Legend provides a visual reference and brief description of most objects found on C-MAP NT+ electronic charts. Images on the left represent relative objects on color displays, while images on the right refer to grayscale displays. These images are only representative of typical systems. Variations of color or grayscale may be noticed from one manufacturer’s system to another. While display of objects may generally be enabled or disabled by the following categories, those marked with an asterisk (*) will always remain on-screen.



LANDMARKS



PORT, SERVICES



DEPTHS, SOUNDINGS



Breakwater *



Buildings



Groyne *, Causeway * (always dry, intertidal, underwater)



Church



Pier, Jetty *



Tower



Mast



Chimney



Flare stack



Monument



Flagstaff



Sounding (depth of 2 meters and 5 dm)



Windmill



Windmotor



Drying height above chart datum



Dish aerial



Radar dome



Intertidal area *, with low water line Cemetery Depth area, with depth line (10 meters)



Depth line (out of selected range) Harbor facility in general



POSITIONS, DIRECTIONS, COMPASS



Fishing harbor Symbols in plan: position is center of symbol Pontoon



ATTENTION AREAS Restricted area



Control point *



Tank



Magnetic variation (see attributes) *



Fortified structure Berth with designation Harbor Master’s office Dolphin *



Caution area (with warning about safety of navigation, e.g. a danger, a risk, a rule, or advice)



Light float, light vessel *



Anchorage area



Colors of lights



Anchorage (no defined limits)



Multiple colored lights on same structure



Sector light (sectors displayed) Dredged area *



Anchor berth, with designation



Unsurveyed area or minimal depiction area *



Anchor berth, with swinging circle



Sector light (sectors not displayed) (an area on the source nautical chart where most information is omitted, to indicate that the chart has too general scale for navigation and to induce the mariner to use more detailed charts)



Custom office



Light characteristic (e.g. fixed, flashing, etc.), period, elevation, range: see attributes



Sea-plane landing area



Anchoring prohibition area



Mooring trot (anchors with chain/wire)



NATURAL FEATURES



Lighthouse



Lighted offshore platform *



Silo



Landing stairs



Light in general



Prohibited area (no unauthorized entry)



Symbols in profile: position is at bottom of symbol Landing place



NAV-AIDS (aids to navigation)



Buoy shapes: nun, can, spherical, pillar, spar, barrel, superbuoy International and US symbols



Hospital, health office Fishing prohibition area



Piles *



Land area and coastline *



Post office



WRECKS, OBSTRUCTIONS



Slipway, ramp



Hill, dune



Diving prohibition area



Gridiron



Land contour lines



Inshore traffic zone



SEABED TYPE



Dry dock



Salt pan



Wet dock



Glacier *



Floating oil barrier



Vegetation area



Area under reclamation *



Tree



Rock (always dry) *



M Mud



Floating dock



Pingo *



Vol Ash Volcanic ash



Cy Clay



K Kelp



Si Silt



Grs Grass



S Sand



Stg Sea-tangle



St Stone



Spi Spicules



G Gravel



Cir Cirripedia



P Pebbles



Fu Fucus



Hulk



Cb Cobbles



Ma Mattes



R Rock



S Co Sabellaria



Gates *, locks



Lv Lava



S Bk Sandbank



Area to be avoided Rock (covers and uncovers) *



Distance mark



Nature reserve



Dam, weir



River, canal



Roll-on, roll-off terminal



Lake



Timber yard



Waterfall



Crane Signal station



Motorway



Coastguard station



Rescue station Yacht harbor, marina Accessories / Marine electronics



Pilot boarding place Parking for boat and trailers Pharmacy



Bank / Exchange



Police



Boat hoist



Post box



Boat yard



Post Office



Major road – type A



m Medium



Gd Ground



c Coarse



Oz Ooze



bk Broken



Ml Marl



sy Sticky



Sn Shingle



so Soft



Bo Boulders



sf Stiff



Ck Chalk



v Volcanic



Qz Quartz



ca Calcareous



Rock (always underwater) *



Breakers



Bottle gas Car parking



Provisions Public radio



Exits



Caravan site



Public radio telegraph



Minor road



Chandler



Public telegraph



Coastguard



Public telephone



Commercial fishing services



Public toilets



Crane



Refuse bin



Customs / Custom police



Restaurant



w White



T Tufa



bl Black



Sc Scoriae



rd Red



Cn Cinders



gn Green



Mn Manganese



b Blue



Gc Glauconite



y Yellow gy Grey



Ms Mussels



br Brown



Sp Sponge



ch Chocolate



Al Algae



lt Light



Fr Foraminifera



d Dark



Electrical / Electronic repairs



Sailmaker



Railway



Electricity



Sewerage pump-out station



Tunnel, tunnel entrances



Engine repairs



Showers



Bridge *



Submerged wreck (non-dangerous)



Explosives dumping ground



Remains of a wreck / foul area



Chemical wastes dumping ground



Wreck area



Nuclear wastes dumping ground



Obstruction



Degaussing range



Cairn



Lateral marks: port, starboard, preferred channel to port, preferred channel to starboard International and US symbols for different regions IALA A and IALA B



Submerged wellhead * Military practice area (firing danger areas, mine-laying practice areas, etc.) Offshore platform * Minefield



Symbol showing direction of buoyage



Submarine cable



Submarine pipeline, with diffuser



Cable area, submarine pipeline area Rocks, wrecks, obstructions, fish havens: the depth value, if known, is encoded into attributes



Log pond



Spoil ground



Cardinal marks: N, E, S, W International and US symbols



Cargo transhipment area



Examples of composite abbreviations:



Incineration area



Pt Pteropods



fS Fine sand



TRACKS, ROUTES



Isolated danger marks International and US symbols



Fishing ground



bkSh Broken shells



Sch Schist



SSh Sand with shells



Co Hd Coral Head



Navigation line



BrM Brown mud



Fish trap area, tunny nets area



Seabed area, rocky area, coral reef Weed / kelp



Marine farm



Safe water marks International and US symbols



Recommended route centerline Deep water route centerline Submarine transit lane



Fishing / Diving gear, SCUBA recharge



Slipway



Fuel station



Transportation services



Sand waves



Harbor Master



Visitor’s berth



Deep water route (depth: see attributes)



Traffic separation scheme: boundary, lanes, separation zone, separation line



Limit of ice / glacier * Special marks International and US symbols International boundary on land



Precautionary area International maritime boundary



TIDES, CURRENTS



Fog signal



Radar range, radar line



Territorial sea area, contiguous zone, fishery zone, continental shelf area, EEZ



Radar station, radar transponder beacon, radio station



Current



Radio calling-in point



Custom zone, free port area



Water turbulence



Ferry route



Harbor area (administrative)



Water



Hotel / Inn



Waypoint



Tide height (prediction available)



Launderette



Yacht Club



Other marine repairs



Fairway Straight territorial sea baseline



Health emergency Overhead pipeline *



Fence



Dumping ground in general



Recommended track



Overhead cable * , with pylons



Telepheric



Submerged wreck (dangerous)



Rd Radiolaria



Spring in seabed Airport



Examples of colored beacons International and US symbols



Gl Globigerina



Minor street Pedestrian way



Seal sanctuary



Military area



Pm Pumice



Po Polyzoa Major street



Game preserve



Fish haven *



Di Diatoms



Track / path



Example of lighted buoy with topmark and radar reflector International and US symbols



h Hard



Ba Basalt



Oy Oysters



Major road – type B Major road – type C



Wd Weed



Md Madrepore



CULTURAL FEATURES



Road in general



Check point



f Fine



Radar reflector Bird sanctuary



Wreck showing hull or superstructure



Sh Shells



Buoy and beacon topmarks



Rock (awash) *



Co Coral



RIVERS, LAKES



Built-up area



Examples of colored buoys International and US symbols



Danger line, in general



Copyright® C-MAP S.r.l. 2001 - Printed in Italy Issue D - 01OCT2002