Seamarks/Signal Stations
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Seamark tagging
Signal Station
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.
The tags defined on this page will render in various nautical charts. This page defines values for the "seamark:type" tag for signal stations and their attribute tags.
Types
| Type | S100 Code | seamark:type | Definition | Example Renderings | Photo |
|---|---|---|---|---|---|
| Signal station, traffic | SISTAT | signal_station_traffic | A signal station to control the movement of marine traffic in a port area. | 
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|
| Signal station, warning | SISTAW | signal_station_warning | A signal station to indicate presence or imminence of some hazardous condition to navigation. |
Categories of Traffic Signal Stations (CATSIT)
Classification of station based on the traffic service provided.
| Category | seamark:signal_station_traffic:category | Definition |
|---|---|---|
| Port control | port_control | A signal station for the control of vessels within a port. |
| Port entry and departure | port_entry_departure | A signal station for the control of vessels entering or leaving a port. |
| International Port Traffic | ipt | 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 | Visual signal lights placed in a waterway to indicate to shipping the movements authorised at the time at which they are shown. |
| Pilotage | pilotage | Pilotage |
| Special Signals | special | Special Signals |
| Oncoming traffic indication | oncoming_traffic | Indicates the oncoming traffic on an inland waterway |
Categories of Warning Signal Stations (CATSIW)
Classification of station based on the warning service provided.
| Category | seamark:signal_station_warning:category | Definition |
|---|---|---|
| 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 | 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 sale | 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. |
| Vertical clearance indication | vertical_clearance | An indication of the vertical clearance of a bridge, overhead cable, etc. |
| High water mark | high_water | An indication of the official high water level. |
| Depth indication | depth | An indication of the local depth. |
| Current | current | a device for measuring and conveying information about the current in the area in question. |
References
OSM seamark resources
- Seamark tag values(en)
- Seamark objects(en)
- Seamark attributes(en)
- Categories of objects(en)
- INT-1 cross reference(en)
- Inland waterway notice marks (CEVNI, Europe)(en)
- Inland waterway lateral marks (CEVNI, Europe)(en)
- Inland waterway notice marks (BNIWR, Brazil)(en)
- Inland waterway notice marks (PPWBC, Brazil/Paraguay)(en)
- Inland waterway notice marks (RIWR, Russia)(en)
JOSM presets & styles
External sources
- S-101 ENC/iENC registry (iho.int), the ENC Data Classification and Encoding Guide (DCEG) can be downloaded as zipped PDF, online access to symbols in Portrayal Register
- International nautical chart symbol legend (Chart INT-1, NOAA)
- Encoding Guide for Inland ENCs (openecdis.org, 2018), an international standard of the Inland ENC Harmonization Group is currently in development (IEHG Publication S-401, 2019)
- European Code for Inland Waterways (CEVNI), (UNECE, Fifth revised version 2015)
- European Code for Signs and Signals on Inland Waterways (SIGNI), (UNECE Resolution N0. 90, 2018)
- U.S. Aids to Navigation System – also details the Western Waters Marking System, Intracoastal Waterway system, and Uniform State Waterway Marking System