Icom MA-510TR AIS Transponder w/Antenna 4.3" Display [MA510TR 13]MA 510TR AIS Transponder with Antenna & 4. 3" Display This Class B AIS Transponder with GPS navigation function and NMEA 2000 actively notifies other vessels of your exact position and as a Dual channel receiver, provides AIS information (both Class A and Class B signals) of other AIS equipped vessels simultaneously. Large 4. 3" color TFT LCD, the backlit screen gives real time vessel traffic information for navigation and collision avoidance. The