AIS

AIS (Automatic Identification system) is an automated tracking system for marine vessels, Aids to navigation and AIS MOB beacons. Transponders installed on vessels transmit ship position, course, speed, heading, vessel type and dimensional data over dedicated VHF channels. Transponders, sometimes referred to as Transceivers, send and receive AIS data whereas receivers only receive AIS data. Nearly all commercial ships are mandated to carry AIS transponders and each year more sail, power and work boats are fitting AIS equipment.