Seamarks/Radio Stations

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Radio stations

The tags defined on this page will render in various nautical charts.

This page defines tags and values for Radio Station objects.

Type S100 seamark:type Definition Rendering
Radio Station RDOSTA radio_station A place equipped to transmit radio waves. RadarStation.png


Where more than one value applies, the tag value should be a semi-colon separated list.

Category (CATROS) seamark:radio_station:category Definition Rendering
Circular (non-directional) marine or aero-marine radiobeacon omnidirectional A radio station which need not necessarily be manned, the emissions of which, radiated around the horizon, enable its bearing to be determined by means of the radio direction finder of a ship. RadioRC.png
Directional radiobeacon directional A special type of radiobeacon station, the emissions of which are intended to provide a definite track for guidance. RadioRD.png
Rotating pattern radiobeacon rotating_pattern A special type of radiobeacon station emitting a beam of waves to which a uniform turning movement is given, the bearing of the station being determined by means of an ordinary listening receiver and a stop watch. Also referred to as a rotating loop radiobeacon. RadioRW.png
Consol beacon consol A type of long range position fixing beacon. RadioConsol.png
Radio direction-finding station rdf A radio station intended to determine only the direction of other stations by means of transmission from the latter. RadioRG.png
Coast radio station providing QTG service qtg A radio station which is prepared to provide QTG service, that is to say, to transmit upon request from a ship, a radio signal, the bearing of which can be taken by that ship. RadioR.png
Aeronautical radiobeacon aeronautical A radio beacon designed for aeronautical use. RadioAero.png
Decca decca The Decca Navigator System is a high accuracy, short to medium range radio navigational aid intended for coastal and landfall navigation. RadioDecca.png
Loran C loran Loran-C is a low frequency electronic position fixing system using pulsed transmissions at 100 Khz. RadioLoran.png
Differential GPS dgps A radiobeacon transmitting DGPS correction signals. RadioDGPS.png
Toran toran Toran is an electronic position fixing system used mainly by aircraft. RadioToran.png
Omega omega Omega is a long-range radio navigational aid which operates within the VLF frequency band. The system comprises eight land based stations. RadioOmega.png
Syledis syledis Syledis is a ranging position fixing system operating at 420-450 MHz over a range of up to 400 km. RadioSyledis.png
Chiaka (Chayka) chiaka Chiaka is a low frequency electronic position fixing system using pulsed transmissions at 100 kHz. RadioChiaka.png
Public communication (for conversations) public_communication Public communication (for conversations) RadarStation.png
Commercial broadcast commercial_broadcast Commercial broadcast. RadarStation.png
Facsimile transmission facsimile Facsimile transmission. RadarStation.png
Time signal time_signal Time signal. RadarStation.png
AIS base station ais_base An onshore AIS unit that monitors traffic in the waterways. RS-AIS.png
Physical AIS ais An AIS radiobeacon on a seamark that reports its own position RS-AIS.png

Other attributes

Attribute seamark:radio_station:<attribute> Value type Definition
Call sign (CALSGN) callsign Text The designated call-sign of a radio station.
Communication channel (COMCHA) channel Text A channel number assigned to a specific radio frequency, frequencies or frequency band.
Estimated range of transmission (ESTRNG) range Decimal The estimated range of a non-optical electromagnetic transmission in nautical miles.
Orientation (ORIENT) orientation Decimal The angular distance measured from true north to the maxima of the main lobe.
Signal frequency (SIGFRQ) frequency Integer The frequency of the sound signal, in Hertz.
MMSI number (-) mmsi Integer The MMSI digits


OSM seamark resources

External sources