The AIS650 is a class B AIS transceiver allowing you to transmit your data to other AIS equipped vessels, and receive their data for viewing right on your Raymarine multifunction displays radar or chartplotter screen. Dual channel receivers - AIS vessel monitoring of class A and B transmissions. Dedicated 50 channel RAIM compliant GPS receiver for superior accuracy. Hardware and software selectable Silent Mode for privacy or security. Silent Mode for privacy or security. Silent mode turns off your AIS transmitter while still enabling you to see transmissions from other vessels. SeaTalkNG networking for simple integration with Raymarine a, c, e, eS and gS Series Multifunction Displays. USB 2.0 port for plug-and-play connection to PC based navigation systems. SD Card Slot for recording of AIS data. Built-in NMEA multiplexer simplifies integration with legacy Multifunction Displays, VHF radios and 3rd party devices.