Receivers

AIS (Automatic Identification system) is an automated tracking system for marine vessels, Aids to navigation and AIS MOB beacons. 

AIS receivers only receive AIS data, transmitted from boats that are equipped with Transceivers/Transponders, allowing you to know their location and heading. AIS receivers will also receive data from AIS MOB beacons, allowing you to locate and recover crew members or casualties that have fallen overboard that are carrying an AIS MOB beacon.

Nearly all commercial ships are mandated to carry AIS transponders and each year more sail, power and work boats are fitting AIS equipment.