The new Si-Tex MDA-4 VHF radio features a built-in high-performance AIS dual-channel receiver for tracking vessels equipped with AIS on its large dot-matrix LCD screen. This DSC-equipped VHF is built to MIL-STD-810G military ruggedness specifications, and it offers both NMEA 2000 and NMEA 0183 network compatibility. The MDA-4 also incorporates an easy-to-use rotary menu control and a built-in 25-watt loudhailer/foghorn with eight different selectable modes and listen-back capability. $459; si-tex.com
