Raymarine Ray73 VHF Radio w/AIS ReceiverRay73 VHF Radio with AIS Receiver Raymarines Ray73 radiois communications central for your boat with built in VHF, AIS andpublic address capabilities. Built on our full sized marine radio chassis, the Ray73 comes with oversized controls and a big screen for easy operation offshore. Ray73 is a full function VHF marine radio with Class D Digital Selective Calling (DSC) and a built in GPS receiver. Simply program your boats MMSI number into the Ray73 and