GX1800 Fixed Mount VHF - BlackFeatures:Meets ITU-R M.493-13 Class D DSC (Digital Selective Calling)Separate Receiver for CH70 (Receiving DSC Calls)Ultra-slim and compact Rear case design (Depth 3.3", 82mm)NMEA 0183 ConnectivityE2O (Easy to Operate) Icon & Menu SystemPreset key stores up to 10 favorite channelsSecond Station Remote Microphone (Optional RAM4 SSM-70H)Intercom Feature between the Radio and an Optional Second StationProgrammable Scan, Priority Scan, and Multi WatchAutomatic DSC polling of up to 6 ships GPS positionsGPS Compass, Waypoint and GPS status pages (when connected to a GPS)Enter, Save, and Navigate to a waypoint using the Compass page (when connected to a GPS)Navigation (LAT/LON, SOG, and COG) information shown on display (when connected to a GPS)GM (Group Monitor) Using DSC Group position CallingMOB (Man over Board) OperationSelectable Night Mode DisplayNoise canceling microphone with channel change selection, 16/S and H/L keysNOAA Weather channels with weather Alert