The Garmin AIS 600 black box transceiver allows mariners to receive AIS target data as well as transmit AIS vessel information. The AIS 600 aids in collision avoidance by helping users track and contact anyone in the area who has a VHF radio and MMSI number. The AIS 600 also employs ClearTrack technology, which ensures that there\'s no interruption of AIS traffic position while the VHF radio is in use. In addition, the AIS 600 integrates with a Garmin chartplotter and VHF radio via NMEA 2000. This gives you the ability to call any MMSI target directly from the chartplotter by selecting the call with radio function.