A signal station is a place on shore from which signals are made to ships at sea (IHO Dictionary, S-32, 5th Edition, 4742). This object class is used to describe the function of the signal station rather than the structure on which the station is sited.
This page defines values for the "seamark:type" tag for signal stations and their attribute tags.
Signal station, traffic
|port control||port_control||a signal station for the control of vessels within a port.|
|port entry and departure||port_entry_and_departure||a signal station for the control of vessels entering or leaving a port.|
|International Port Traffic||international_port_traffic||a signal station displaying International Port Traffic signals.|
|berthing||berthing||a signal station for the control of vessels when berthing.|
|dock||dock||a signal station for the control of vessels entering or leaving a dock.|
|lock||lock||a signal station for the control of vessels entering or leaving a lock.|
|flood barrage||flood_barrage||a signal station for the control of vessels wishing to pass through a flood control barrage.|
|bridge passage||bridge_passage||a signal station for the control of vessels wishing to pass under a bridge.|
|dredging||dredging||a signal station indicating when dredging is in progress.|
|traffic control light||traffic_control_light||visual signal lights placed in a waterway to indicate to shipping the movements authorised at the time at which they are shown.|
Signal station, warning
|danger||danger||a signal or message warning of the presence of a danger to navigation.|
|maritime obstruction||maritime_obstruction||a signal or message warning of the presence of a maritime obstruction.|
|cable||cable||a signal or message warning of the presence of a cable.|
|military practice||military_practice||a signal or message warning of activity in a military practice area.|
|distress||distress||a station that may receive or transmit distress signals.|
|weather||weather||a visual signal displayed to indicate a weather forecast.|
|storm||storm||a signal or message conveying information about storm conditions.|
|ice||ice||a signal or message conveying information about ice conditions.|
|time||time||an accurate signal marking a specified time or time interval. It is used primarily for determining errors of timepieces. Such signals are usually sent from an observatory by radio or telegraph, but visual signals are used at some ports.|
|tide||tide||a signal or message conveying information on tidal conditions in the area in question.|
|tidal stream||tidal_stream||a signal or message conveying information on condition of tidal currents in the area in question.|
|tide gauge||tide_gauge||a device for measuring the height of tide. A graduated staff in a sheltered area where visual observations can be made; or it may consist of an elaborate recording instrument making a continuous graphic record of tide height against time. Such an instrument is usually actuated by a float in a pipe communicating with the sea through a small hole which filters out shorter waves.|
|tide scale||tide_scale||a visual scale which directly shows the height of the water above chart datum or a local datum.|
|diving||diving||a signal or message warning of diving activity|
|water level gauge||water_level_gauge||a device for measuring and conveying information about the water level (non-tidal) in the area in question.|
Relevant attributes for signal stations, as also listed in OpenSeaMap/Seamark Attributes.
|Attribute||Acronym||attribute key||Definition||Expected input|
|Communication channel||COMCHA||channel=*||A channel number assigned to a specific radio frequency, frequencies or frequency band.||enter specific VHF-Channel|
|Date end||DATEND||end_date=*||The attribute 'date end' indicates the latest date on which an object (e.g. a buoy) will be present.
This attribute is to be used to indicate the removal or cancellation of an object at a specific date in the future. See also 'periodic date end'
|Date. Slight name and format differences!|
|Date start||DATSTA||start_date=*||The attribute 'date, start' indicates the earliest date on which an object (e.g. a buoy) will be present.
This attribute is to be used to indicate the deployment or implementation of an object at a specific date in the future. See also 'periodic date start'.
|Date. Slight name and format differences!|
|Object name in national language||NOBJNM||?||see maybe nat_name=*|
|Object name||OBJNAM||name||see OpenSeaMap/Seamark_Attributes and maybe name=*|
|Periodic date end||PEREND||?||see OpenSeaMap/Seamark_Attributes and maybe service_times=*|
|Periodic date start||PERSTA||?||see OpenSeaMap/Seamark_Attributes and maybe service_times=*|