Raymarine Ray55 VHF Fixed Mount Radio Compact fixed mount design with full 25-watt output and optional RayMic second station controls Class D DSC (Digital Selective Calling) with front-mounted distress key and GPS interface Dual channel (2UP) display shows your active channel and standby channel simultaneously Superior, professional-grade receiver with excellent intermodulation rejection for crystal clear reception Extra large dot-matrix LCD, convenient rotary controls, and on-mic controls