Details: The RYA VHF Radio Course is also known as the Short Range Certificate (SRC) Course. It is a 1 day course in how to operate a VHF Radio and all the procedures associated with using a radio, for example calling marinas, how to send a Mayday or a PanPan and how to ‘relay’ either of these. The VHF Course covers Digital Selective Calling (DSC) – the method of calling other yachts electronically, as well as the traditional method of calling by voice.