AIS-MOB

A personal AIS man-overboard beacon that, when activated (usually automatically on immersion), transmits the casualty's GPS position as an AIS distress target visible on every nearby AIS receiver.

Test your knowledge

Know your nautical terms? Play the free SkipperCheck daily maritime quiz — COLREGs, navigation, VHF radio, seamanship. Earn points, climb the global leaderboard.

Play the Daily Quiz →

Related A-terms

AIS

Automatic Identification System — a VHF-based transponder network that continuously broadc…

Asymmetric spinnaker

A downwind sail (also called a cruising chute or gennaker) with a fixed tack but no pole, …

Aboard

On, onto, or inside the vessel.

ARPA

Automatic Radar Plotting Aid — radar software that tracks targets automatically and comput…

Athwartships

Running across the vessel from one side to the other, at right angles to the fore-and-aft …

Aback

A sail that has been trimmed so the wind pushes against the reverse side of the cloth, fil…

← Back to full glossary