Interpreting the Navigational Status (0-15) in an AIS message.
What is navigational status?
Ships broadcast their navigational status within position message types 1, 2, 3 and 27. It can take on a value from 0 to 15, and each number represents a unique piece of metadata associated with the vessel's activity. We provide this value within the status field.
What does each number mean?
- 0 : Under way using its engine
- 1 : Anchored
- 2 : Not under command
- 3 : Has restricted maneuverability
- 4 : Ship draught is limiting its movement
- 5 : Moored (tied to another object to limit free movement)
- 6 : Aground
- 7 : Engaged in fishing
- 8 : Under way sailing
- 9 : (Number reserved for modifying reported status of ships carrying dangerous goods/harmful substances/marine pollutants)
- 10 : (Number reserved for modifying reported status of ships carrying dangerous goods/harmful substances/marine pollutants)
- 11 : Power-driven vessel towing astern
- 12 : Power-driven vessel pushing ahead/towing alongside
- 13 : (Reserved for future use)
- 14 : Any of the following are active: AIS-SART (Search and Rescue Transmitter), AIS-MOB (Man Overboard), AIS-EPIRB (Emergency Position Indicating Radio Beacon)
- 15 : Undefined (default)