Seamarks/Seamark Objects

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Seamark Tagging
General Information
INT-1 Cross Reference

This is the index of the items in the S-100 Object catalogue and their OSM tag names. Each object has links to the page that describes the tagging of that particular object.

The index of S-100 attributes for these objects is at: Seamark Attributes

Object Index

The 'object key' in the following table is the <object> part of a "seamark:<object>:<attribute>" tag or the value of a "seamark:type=*" tag.

Table items link to the Wiki pages for that object.

Object S-100 OSM Element object key Valid Attributes IHO Definition Usage
Anchorage area ACHARE NodeArea anchorage category, restriction, danger_class An area in which vessels anchor or may anchor. seamark:type=anchorage
Anchor berth ACHBRT NodeArea anchor_berth category, radius, danger_class A designated area of water where a single vessel, sea plane, etc... may anchor. seamark:type=anchor_berth
Beacon, cardinal BCNCAR Node beacon_cardinal category, colour, colour_pattern, construction, elevation, height, reflectivity, shape A beacon used in conjunction with the compass to indicate where the mariner may find the best navigable water. seamark:type=beacon_cardinal
Beacon, isolated danger BCNISD Node beacon_isolated_danger colour, colour_pattern, construction, elevation, height, reflectivity, shape A beacon that is moored on or above an isolated danger of limited extent, which has navigable water all around it. seamark:type=beacon_isolated_danger
Beacon, lateral BCNLAT Node beacon_lateral category, colour, colour_pattern, construction, elevation, height, impact, reflectivity, shape, system A beacon used to indicate the port or starboard hand side of the route to be followed. seamark:type=beacon_lateral
Beacon, safe water BCNSAW Node beacon_safe_water colour, colour_pattern, construction, elevation, height, reflectivity, shape A beacon used to indicate that there is navigable water around the mark. seamark:type=beacon_safe_water
Beacon, special purpose/general BCNSPP Node beacon_special_purpose category, colour, colour_pattern, construction, elevation, height, reflectivity, shape A beacon primarily used to indicate an area or feature, the nature of which is apparent from reference to a chart, Sailing Directions or Notices to Mariners. seamark:type=beacon_special_purpose
Berth BERTHS NodeWayArea berth minimum_depth, danger_class A named or numbered place where a vessel is moored at a wharf. seamark:type=berth
Bridge BRIDGE NodeWayArea bridge category, colour, colour_pattern, condition, clearance, construction, reflectivity, visibility, vertical_clearance, vertical_clearance_closed, vertical_clearance_open A structure erected over a body of water, railroad, etc. to provide a roadway for vehicles, pedestrians or to carry utility services. seamark:type=bridge
Bunker station bunsta NodeArea bunker_station category A station, at which a ship is able to bunker fuel, water or ballast seamark:type=bunker_station
Building, single BUISGL NodeArea building colour, colour_pattern, construction, elevation, function, height, reflectivity, shape, visibility A relatively permanent structure, roofed and usually walled. It is designed for some particular use which it may be important to indicate. seamark:type=building
Buoy, cardinal BOYCAR Node buoy_cardinal category, colour, colour_pattern, reflectivity, shape A buoy used in conjunction with the compass to indicate where the mariner may find the best navigable water. seamark:type=buoy_cardinal
Buoy, installation BOYINB Node buoy_installation category, colour, colour_pattern, reflectivity A buoy used for loading tankers with gas or oil. seamark:type=buoy_installation
Buoy, isolated danger BOYISD Node buoy_isolated_danger colour, colour_pattern, reflectivity, shape A buoy that is moored on or above an isolated danger of limited extent, which has navigable water all around it. seamark:type=buoy_isolated_danger
Buoy, lateral BOYLAT Node buoy_lateral category, colour, colour_pattern, reflectivity, shape, system A buoy used to indicate the port or starboard hand side of the route to be followed. seamark:type=buoy_lateral
Buoy, safe water BOYSAW Node buoy_safe_water colour, colour_pattern, reflectivity, shape A buoy used to indicate that there is navigable water around the mark. seamark:type=buoy_safe_water
Buoy, special purpose/general BOYSPP Node buoy_special_purpose category, colour, colour_pattern, reflectivity, shape A buoy primarily used to indicate an area or feature, the nature of which is apparent from reference to a chart, Sailing Directions or Notices to Mariners. seamark:type=buoy_special_purpose
Cable area CBLARE Area cable_area category, restriction An area which contains one or more submarine cables. seamark:type=cable_area
Cable, overhead CBLOHD Way cable_overhead category, vertical_clearance, clearance_height_safe An overhead cable is an assembly of wires or fibres, or a wire rope or chain, which is supported by structures such as poles or pylons and passing over or nearby navigable waters. seamark:type=cable_overhead
Cable, submarine CBLSUB Way cable_submarine category, depth_buried An assembly of wires or fibres, or a wire rope or chain which has been laid underwater or buried beneath the seabed. seamark:type=cable_submarine
Causeway CAUSWY WayArea causeway water_level A raised way across low or wet ground or water. seamark:type=causeway
Checkpoint CHKPNT NodeArea checkpoint category An official place to register, declare or check goods and people. seamark:type=checkpoint
Coastguard station CGUSTA NodeArea coastguard_station Watch keeping stations at which a watch is kept either continuously, or at certain times only. seamark:type=coastguard_station
Communication area comare Area communication_area Indicates the coverage of an area, in which a vessel has to report or may request information. seamark:type=communication_area
Control point CTRPNT Node control_point category A point on the ground where position (horizontal and vertical) is used as a base for a dependent survey. Also referred to as a control station. seamark:type=control_point
Daymark DAYMAR Node daymark category, colour, colour_pattern, shape The identifying characteristics of an aid to navigation which serve to facilitate its recognition against a daylight viewing background. seamark:type=daymark
Distance mark DISMAR Node distance_mark category, distance, units A distance mark indicates the distance measured from an origin and consists of either a solid visible structure or a distinct location without special installation. seamark:type=distance_mark
Dredged area DRGARE Area dredged_area An area of the bottom of a body of water which has been deepened by dredging. seamark:type=dredged_area
Exceptional navigation structure excnst NodeWayArea exceptional_structure category An exceptional navigational construction like aqueduct, lift-lock, etc. seamark:type=exceptional_structure
Fairway FAIRWY Area fairway restriction That part of a river, harbour and so on, where the main navigable channel for vessels of larger size lies. seamark:type=fairway
Ferry route FERYRT Way ferry_route category A route in a body of water where a ferry crosses from one shoreline to another. seamark:type=ferry_route
Fence/Wall FNCLNE Way wall category A natural or man-made barrier used as an enclosure or boundary or for protection. seamark:type=wall
Fog signal FOGSIG Node fog_signal category, frequency, generation, group, period, range, sequence A warning signal transmitted by a vessel, or aid to navigation, during periods of low visibility. seamark:type=fog_signal
Fortified structure FORSTC NodeAreaArea fortified_structure category A structure for the military defence of a site. seamark:type=fortified_structure
Fishing facility FSHFAC NodeWayArea fishing_facility category A structure in shallow water for fishing purposes which can be an obstruction to ships in general. seamark:type=fishing_facility
Gate GATCON NodeWayArea gate category A structure that may be swung, drawn, or lowered to block an entrance or passageway. seamark:type=gate
Gridiron GRIDRN NodeArea gridiron water_level A structure in the intertidal zone serving as a support for vessels at low stages of the tide to permit work on the exposed portion of the vessel's hull. seamark:type=gridiron
Harbour basin hrbbsn Area harbour_basin An enclosed area of water surrounded by quay walls constructed to provide means for the transfer of cargos from and to ships. seamark:type=harbour_basin
Harbour facility HRBFAC NodeArea harbour category A natural or artificially improved body of water providing protection for vessels, and providing anchoring and docking facilities. seamark:type=harbour
Hulk HULKES NodeArea hulk category A permanently moored ship. seamark:type=hulk
Inshore traffic zone ISTZNE NodeWayArea inshore_traffic_zone restriction A routeing measure comprising a designated area between the landward boundary of a traffic separation scheme and the adjacent coast, to be used in accordance with the provisions of the International Regulations for Preventing Collisions at Sea. seamark:type=inshore_traffic_zone
Landmark LNDMRK NodeWayArea landmark category, colour, colour_pattern, construction, elevation, function, height, reflectivity, visibility A prominent object at a fixed location which can be used in determining a location or a direction. seamark:type=landmark
Light LIGHTS NodeArea light category, character, colour, exhibition, group, height, multiple, orientation, period, range, sector_start, sector_end, sequence, visibility A luminous or lighted aid to navigation. seamark:type=light
Major Light LIGHTS NodeArea light_major category, character, colour, exhibition, group, height, multiple, orientation, period, range, sector_start, sector_end, sequence, visibility A luminous or lighted aid to navigation. seamark:type=light_major
Minor Light LIGHTS NodeArea light_minor category, character, colour, exhibition, group, height, multiple, orientation, period, range, sector_start, sector_end, sequence, visibility A luminous or lighted aid to navigation. seamark:type=light_minor
Light float LITFLT Node light_float colour, colour_pattern, reflectivity A boat-like structure used instead of a light buoy in waters where strong streams or currents are experienced, or when a greater elevation than that of a light buoy is necessary seamark:type=light_float
Light vessel LITVES Node light_vessel colour, colour_pattern, reflectivity A distinctively marked vessel anchored or moored at a charted point, to serve as an aid to navigation. seamark:type=light_vessel
Lock basin LOKBSN Area lock_basin A lock basin is a wet dock in a waterway, permitting a ship to pass from one level to another. seamark:type=lock_basin
Marine farm/culture MARCUL NodeWayArea marine_farm category, restriction, water_level An assemblage of cages, nets, rafts and floats or posts where fish, including shellfish, are artificially cultivated. seamark:type=marine_farm
Military practice area MIPARE NodeArea military_area category, restriction An area within which naval, military or aerial exercises are carried out. Also called an 'exercise area'. seamark:type=military_area
Mooring/Warping facility MORFAC NodeWayArea mooring category, colour, colour_pattern, construction, height, reflectivity, shape, visibility, water_level The equipment or structure used to secure a vessel. seamark:type=mooring
Marine Protected Area MPAARE NodeArea protected_area Any area of the intertidal or sub-tidal terrain, together with its overlying water and associated flora, fauna, historical and cultural features, which has been reserved by law or other effective means to protect part or all of the enclosed environment. seamark:type=protected_area
Navigation line NAVLNE Way navigation_line category, orientation A straight line extending towards an area of navigational interest and generally generated by two navigational aids or one navigational aid and a bearing. seamark:type=navigation_line
Notice mark notmrk Node notice addition, category,

condition, distance_min, distance_max, distance_up, distance_down, function, impact, system

A signboard used to indicate prohibitions, regulations, restrictions, recommendations and general information which apply to a waterway or a section of a waterway. seamark:type=notice
Obstruction OBSTRN NodeWayArea obstruction category, water_level In marine navigation, anything that hinders or prevents movement, particularly anything that endangers or prevents passage of a vessel. seamark:type=obstruction
Oil barrier OILBAR Way oil_barrier A construction to dam oil flow on water. seamark:type=oil_barrier
Offshore platform OFSPLF NodeArea platform category, colour, colour_pattern, construction, condition, height, product, reflectivity, visibility A permanent offshore structure, either fixed or floating, used in the production of oil or natural gas. seamark:type=platform
Offshore production area OSPARE Area production_area category, condition, height, reflectivity, restriction, visibility An area at sea within which there are production facilities. seamark:type=production_area
Pilot boarding place PILBOP Node pilot_boarding category, channel The meeting place to which the pilot comes out. seamark:type=pilot_boarding
Pile PILPNT Node pile category, colour, colour_pattern, condition, height, visibility A long heavy timber or section of steel, wood, concrete, etc. forced into the earth which may serve as a support, as for a pier, or a free standing pole within a marine environment. seamark:type=pile
Pipeline area PIPARE Area pipeline_area category, condition, restriction An area containing one or more pipelines. seamark:type=pipeline_area
Pipeline, overhead PIPOHD Way pipeline_overhead category An overhead pipeline is a pipeline supported by pylons and passing over or nearby navigable waters. seamark:type=pipeline_overhead
Pipeline, submarine/on land PIPSOL Way pipeline_submarine category, condition, depth_buried, product A pipeline lying on or buried under the seabed or the land. seamark:type=pipeline_submarine
Pontoon PONTON WayArea pontoon A floating structure, usually rectangular in shape which serves as landing, pier head or bridge support. seamark:type=pontoon
Precautionary area PRCARE NodeArea precautionary_area restriction A routeing measure comprising an area within defined limits where ships must navigate with particular caution and within which the direction of traffic flow may be recommended. seamark:type=precautionary_area
Pylon/bridge support PYLONS NodeArea pylon category, water_level A vertical construction consisting, for example, of a steel framework or pre-stressed concrete to carry cables, a bridge, etc. seamark:type=pylon
Radar line RADLNE Way radar_line A track along which ships may be guided by coastal radar stations in the event of bad visibility. Also known as a radar guided track. seamark:type=radar_line
Radar range RADRNG Area radar_range Indicates the coverage of a sea area by a radar surveillance station. Inside this area a vessel may request shore-based radar assistance, particularly in poor visibility. seamark:type=radar_range
Radar reflector RADRFL Node radar_reflector height A device capable of, or intended for, reflecting radar signals. seamark:type=radar_reflector
Radar transponder beacon RTPBCN Node radar_transponder category, group, range, sector_start, sector_end, sequence, wavelength A transponder beacon transmitting a coded signal on radar frequency, permitting an interrogating craft to determine the bearing and range of the transponder. Also called racon. seamark:type=radar_transponder
Radar station RADSTA Node radar_station category, channel, height, range A station with a transmitter emitting pulses of ultra-high frequency radio waves which are reflected by solid objects and are detected upon their return to the sending station. seamark:type=radar_station
Radio calling-in point RDOCAL NodeWay calling-in_point channel, orientation, traffic_flow On passing a radio calling-in point or crossing a defined line vessels are required to report on VHF to a Traffic Control Centre. seamark:type=calling-in_point
Radio station RDOSTA Node radio_station category, callsign, channel, frequency A place equipped to transmit radio waves. seamark:type=radio_station
Recommended route centerline RCRTCL Way recommended_route_centreline A recommended route centerline indicates the 'centerline' of a recommended route. seamark:type=recommended_route_centreline
Recommended track RECTRC Way recommended_track traffic_flow, orientation That portion of a 'navigation line' that a ship should use for navigation. seamark:type=recommended_track
Recommended traffic lane RCTLPT Way recommended_traffic_lane orientation Indicates the recommended traffic flow e.g., between two TSS, in the entrance areas of a TSS, beside a deep water route. seamark:type=recommended_traffic_lane
Rescue station RSCSTA NodeArea rescue_station category A place at which life saving equipment is held. seamark:type=rescue_station
Restricted area RESARE Area restricted_area category, restriction A specified area designated by an appropriate authority within which navigation is restricted in accordance with certain specified conditions. seamark:type=restricted_area
Retro-reflector RETRFL Node retro_reflector A means of distinguishing unlighted marks at night. Retro-reflective material is secured to the mark in a particular pattern to reflect back light. seamark:type=retro_reflector
Sand waves SNDWAV NodeArea sand_waves A large mobile wave-like sediment feature in shallow water and composed of sand. The wavelength may reach 100 metres, the amplitude may be up to 20 metres. seamark:type=sand_waves
Seabed area SBDARE NodeWayArea seabed_area surface, surface_qualification, water_level An area of the sea where the nature of bottom is homogeneous. The nature of bottom includes the material of which it is composed and its physical characteristics. seamark:type=seabed_area
Sea area/named water area SEAARE NodeArea sea_area category A geographically defined part of the sea or other navigable waters. It may be specified within its limits by its proper name. seamark:type=sea_area
Sea-plane landing area SPLARE NodeArea seaplane_landing_area restriction A designated portion of water for the landing and take-off of sea-planes. seamark:type=seaplane_landing_area
Shoreline construction SLCONS NodeWayArea shoreline_construction category, construction, height, reflectivity, visibility, water_level A fixed (not afloat) artificial structure between the water and the land, i.e. a man-made coastline. seamark:type=shoreline_construction
Signal station, traffic SISTAT Node signal_station_traffic category, channel Traffic signal stations regulate the movement of traffic. seamark:type=signal_station_traffic
Signal station, warning SISTAW Node signal_station_warning category, channel A signal station is a place on shore from which signals are made to ships at sea. seamark:type=signal_station_warning
Small craft facility SMCFAC NodeWayArea small_craft_facility category A place at which a service generally of interest to small craft or pleasure boats is available. seamark:type=small_craft_facility
Spring in seabed SPRING Node spring A natural issue of water or other substances from the earth. One on the bottom of the sea is called a 'submarine spring'. seamark:type=spring
Submarine transit lane SUBTLN Area submarine_transit_lane restriction An area where submarines may navigate under water or at the surface. seamark:type=submarine_transit_lane
Topmark TOPMAR Node topmark colour, colour_pattern, shape A characteristic shape secured at the top of a buoy or beacon to aid in its identification. seamark:type=topmark
Traffic separation scheme boundary TSSBND Way separation_boundary category The outer limit of a traffic lane part or a traffic separation scheme roundabout. seamark:type=separation_boundary
Traffic separation scheme crossing TSSCRS Area separation_crossing category, restriction A defined area where traffic lanes cross. seamark:type=separation_crossing
Traffic separation scheme lane part TSSLPT Way separation_lane category, restriction An area within defined limits in which one-way traffic flow is established seamark:type=separation_lane
Traffic separation line TSELNE Way separation_line category, orientation, restriction A line separating lanes in which ships are travelling in opposite or nearly opposite directions; or separating traffic lanes designated for particular classes of ships proceeding in the same direction seamark:type=separation_line
Traffic separation scheme roundabout TSSRON Area separation_roundabout category, restriction A roundabout is a traffic separation scheme in which traffic moves in a counter-clockwise direction around a specified point or zone. seamark:type=separation_roundabout
Traffic separation zone TSSZNE Area separation_zone category, restriction A zone separating the lanes in which ships are proceeding in opposite or nearly opposite directions; or separating traffic lanes designated for particular classes of ships proceeding in the same direction. seamark:type=separation_zone
Turning basin trnbsn NodeArea turning_basin An area of water or enlargement of a channel used for turning vessels. seamark:type=turning_basin
Two-way route part TWRTPT Way two-way_route A two-way route part is an area of a two-way route within which traffic flow is generally along one bearing (and possibly its reciprocal). seamark:type=two-way_route
Underwater/awash rock UWTROC Node rock surface, surface_qualification, water_level A concreted mass of stony material or coral which dries, is awash or is below the water surface. seamark:type=rock
Vegetation VEGATN NodeWayArea vegetation category Collections of, or individual plants. seamark:type=vegetation
Vehicle transfer vehtrf NodeArea vehicle_transfer category A place where vehicles can be loaded or unloaded from the inland vessel with onboard or on-shore facilities. seamark:type=vehicle_transfer
Water turbulence WATTUR NodeWayArea water_turbulence category The disturbance of water caused by the interaction of any combination of waves, currents, tidal streams, wind, shoal patches and obstructions. seamark:type=water_turbulence
Waterway gauge wtwgag Node waterway_gauge category A waterway gauge is an instrument for measuring water levels seamark:type=waterway_gauge
Weed/Kelp WEDKLP NodeArea weed category Seaweed, any macroscopic marine alge or seagrass. Kelp is one of an order (laminariales) of usually large, blade-shaped or vine-like brown algae. seamark:type=weed
Wreck WRECKS NodeArea wreck category, depth, reflectivity, visibility, water_level The ruined remains of a stranded or sunken vessel which has been rendered useless. seamark:type=wreck


Seamark Tag Values
Seamark Objects
Seamark Attributes
INT-1 Cross Reference
S-100 ENC/iENC registry (
ENC Encoding Guide (
Encoding Guide for Inland ENCs (