Why Buoyancy Aids Are Not Lifejackets
A clear guide to the difference — and when to use each
pmrsailing.uk blog
They both float.
They both strap on.
They both save lives.
But buoyancy aids and lifejackets are not the same thing — and choosing the right one depends entirely on where, how, and what you’re sailing.
Buoyancy Aids – What Are They?
A buoyancy aid is designed to provide enough flotation to help a conscious, confident swimmer stay afloat.
They are:
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Low profile and lightweight
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Ideal for dinghy sailing
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Designed for mobility (you’ll be climbing back into boats and moving quickly)
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Usually rated at 50N (Newtons) of buoyancy
You’ll see them worn by dinghy sailors, paddleboarders, kayakers, and youth sailors — especially on rivers or inland lakes where rescue is nearby.
Lifejackets – What Makes Them Different?
Lifejackets are designed to save your life even if you’re unconscious.
They:
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Have more flotation (typically 150N or more)
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Are designed to turn you face-up in the water
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Often inflate automatically when submerged
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Are used for coastal or offshore sailing where rescue might take time
They are bulkier, sometimes have built-in harnesses, and are a must when you’re far from shore, sailing solo, or in unpredictable seas.
When to Wear Each
| Situation | Buoyancy Aid | Lifejacket |
|---|---|---|
| Dinghy sailing on a river | ✅ Yes | ❌ No |
| Kayaking or paddleboarding | ✅ Yes | ❌ No |
| Coastal cruising on a yacht | ❌ No | ✅ Yes |
| Offshore sailing or racing | ❌ No | ✅ Yes |
| Safety boat duty (calm river) | ✅ Yes | ❌ No |
River Thames Advice
At Upper Thames Sailing Club, most sailors wear buoyancy aids. For many races, they are Mandatory. No buoyancy aid, no Racing.
The water is shallow, the banks are close, and safety boats are always near.
But remember:
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It must be securely fastened
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It must be the right size for your body
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And it only works if you wear it
Key Takeaway
A buoyancy aid helps you float. A lifejacket helps you survive.
Make sure you choose the right one for the conditions — and the right one for you.
📖 Learn more about safe river sailing and equipment at:
https://pmrsailing.uk/sailing-lessons/sailing-terms-list/life-or-buoyancy.html
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