Icom M506 VHF radio with AIS receiver and rear-mounted MIc, with built-in Loudhailer/Foghorn, Nmea 2000, and remote function. Through the integrated AIS receiver, Ic-M506 can display AIS ship traffic information on the display. With the AIS target call function, you can easily set up a single DSC call. The "Plotter", "Target" list and "Dangerous" list can be switched on the display. With the plug-and-play function of Nmea 2000, Ic-M506 can be easily connected to the Nmea 2000 network and interconnected with other devices. Nmea 0183 input/output can also be used for external Gps/nav interface. Icom M506 sets the standard for maritime communications. With the large 3.4-inch LCD display, it is easier than ever to read Gps, Ais, DSC and radio menus. The bottom line of the display shows the software key functions, and the left and right buttons can be used to switch functions. You can talk to people on deck or ashore through the microphone of the radio, and hear peopleâ€s echoes through the Heller Horn. You can also use Foghorn and RX speaker functions; the optional Commandmic Hm-195B/sw provides a second station function. Use Ic-M506 in a separate cabin or tower, most functions (including DSC and AIS functions) can be controlled by Commandmic Control, and can be used as a walkie-talkie between Ic-M506 and Commandmic, built-in two-way active noise reduction function, this function can reduce the background noise by up to 90%, while improving the transmission effect of voice and incoming calls. The last call recording function will automatically save the last two minutes of the last call, and you can also start recording. The device can be immersed in the Ipx8 submersible, and an optional voice encryptor can be installed.