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From the Back Cover

A VHS set is in constant use on any boat. You can call other craft, marinas and the Coastguard. You cal listen to information broadcasts, gale warnings, and even get advice from a doctor. A very useful bit of kit.

But VHF just got better. Connect the set to a DSC Controller and your GPS, and you can send a distress massage automatically at the touch of the red button. The signal contains your identity and position, and is repeated every four minutes. You are now using Digital Selective Calling, which is part of the Global Maritime Distress and Safety System, and stand an excellent chance of being rescued.

This book is written with a light touch and is clear and easy to understand. It is beautifully illustrated in colours and features computer simulations of DSC procedures. Use it to pass the exam, then keep it on board for reference. When you need to make a call, the facts will be at your fingertips.

How to set works
Which channel to use
Types of VHS call
Digital Selective Calling
GMDSS – DSC, EPIRBs, SARTs, MAVTEX
Emergencies and resc