The GM800 meets the GMDSS requirements as required for SOLAS regulated commercial vessels engaging in international voyage. The radio also meets the MED, "wheel mark" requirements for European merchant ships. Output Power: 125W (4.0-27.5MHz) 85W (1.6-3.999MHz) DSC Rating: Class A NMEA: NMEA 0183 interface for GPS connection Waterproof Rating: IPX7 (controller only) Dedicated Distress Button Distress buttonThe GM800 meets ITU-R M.493-13 DSC. The dedicated DSC watch-keeping receiver continuously scans the six distress channels in rotation. A total of 100 MMSI members for DSC calls can stored with a 10-character ID name. The DSC Multitask function shows up to seven DSC procedures. The GM800 is also capable of sending a distress relay call.