The VHF radio is the most important communication tool on any boat – a lifeline for safety and the everyday phone line of the sea. It calls for help in an emergency, talks to marinas and port control, hails other boats and picks up weather forecasts. You don't need to be an expert to understand the basics, and knowing them makes you a more useful crew member. Here's a beginner's guide to VHF radio for sailing.
Why VHF, not a mobile phone?
A mobile needs signal and only reaches one person. A VHF radio works far offshore, and crucially it broadcasts to everyone in range – every nearby boat and the coastguard hear a distress call at once, so help can come from the closest vessel. That's why VHF, not a phone, is the primary safety radio at sea. Many sets also have DSC (Digital Selective Calling), which sends an automated distress alert with your GPS position at the push of a button.
The key channels
- Channel 16 – the international distress, safety and calling channel. You keep a listening watch on 16, make first contact here, then switch to a working channel to chat.
- Working channels – used for the actual conversation once you've made contact, to keep 16 clear.
- Marina & port channels – each harbour publishes its own channel for berthing instructions.
Making a call – and a Mayday
A routine call is simple: say who you're calling, then who you are, wait for a reply, and switch to a working channel. In a life-threatening emergency you send a "Mayday" on channel 16 – stating your position, the nature of the emergency and how many are aboard – or press the DSC distress button. On a trip the skipper handles all radio work, but everyone should know how to raise the alarm. Note that operating a VHF usually requires an operator's certificate, which you can gain alongside a skipper training week.
Want to learn the radio and more? Our sailing wiki covers the essentials.
Frequently asked questions
What is VHF channel 16 used for?
It's the international distress, safety and calling channel. You keep watch on it, make first contact and send emergency calls here, then move to a working channel to talk.
Do I need a licence to use a VHF radio?
Operating one usually requires a short VHF operator's certificate. On a shared trip the skipper handles the radio, so you don't need one to join.
Why use VHF instead of a phone at sea?
VHF works offshore without signal and broadcasts to all nearby boats and the coastguard at once, so the nearest vessel can respond – vital in an emergency.
Conclusion
Keep a watch on channel 16, know how to make a call and raise a Mayday, and the VHF becomes your trusted link to the wider world at sea. Ready to learn the ropes? Join a skipper training week.
