Radio guides
Short, plain guides to marine VHF procedure, written to the SRC syllabus. Each one starts with the answer, then the detail, and links to the scenario that lets you practise it.
How to make a Mayday call on VHF
When to use Mayday, the DSC distress alert, the Mayday call and message on channel 16 with a worked example, the MIPDANIO memory aid, and how to cancel a false alert.
Read the guide