I have lost count of the British crews who arrived in France certain their lifejackets were fine, only to discover the French rules are written differently from the ones they grew up with. Not stricter exactly, but tied to a logic that catches people out: the buoyancy you must carry depends on how far you sail from a shelter. Get that wrong and you are both unsafe and non-compliant if the Gendarmerie Maritime asks to see your kit.
Let me lay it out the way I wish someone had laid it out for me on the pontoon at Cherbourg.
The rule is distance, not flag
French leisure boating safety lives under Division 240, and the principle that matters for lifejackets is simple. The further you go from shelter, the more buoyancy each person aboard must have. The three bands are:
- Up to 2 nautical miles from a shelter: a minimum of 50 newtons per person.
- Between 2 and 6 miles: a minimum of 100 newtons.
- Beyond 6 miles: a minimum of 150 newtons.
Those numbers are the heart of it. A 50N buoyancy aid is fine for pottering close inshore but is not a lifejacket in the true sense, because it will not reliably turn an unconscious person face-up. The 100N and 150N jackets will. If your cruising crosses the 6-mile line, every soul aboard needs a 150N jacket, full stop. This sits inside the wider equipment ladder I cover in division 240 safety equipment for visiting boats.
What the standard means
The jackets must be CE approved and classified under the standard NF EN ISO 12402, with the performance levels marked as 50, 100 or 150. When you read the label, that ISO 12402 number with the buoyancy level is what a French inspection looks for. A jacket bought in the UK to the same European standard is fine; a jacket to some other national-only standard may not be.
A practical note on the 150N figure. For an adult in light clothing 150N is the minimum, but if you sail in heavy oilskins and boots, the extra weight of waterlogged kit eats into that buoyancy, which is why offshore jackets often go to 170N or higher. The 150N is a floor, not a target.
Children are treated separately
This is the rule visiting families most often miss. For a child weighing under 30 kg, a level 100 jacket is compulsory regardless of distance from shelter. It does not matter that you are pottering 1 mile out where an adult could wear a 50N aid; the child still needs the 100N jacket.
There is a sensible reason. Foam jackets are recommended over inflatable ones for children under 30 kg, because a small child may not trigger or cope with an automatic inflatable, and foam works the instant they hit the water with nothing to go wrong. Fit foam to the little ones and do not compromise on it.
Foam or automatic inflatable
For adults you have the choice. Foam jackets are simple, always ready, and have nothing to fail, but they are bulky and people leave them in the locker. Automatic inflatable jackets are comfortable enough to actually wear all day, which is the whole point, because the best lifejacket is the one you have on when you go over.
If you choose inflatable, two things matter for both safety and French compliance. The jacket needs a current, correctly armed gas cylinder and firing head, and it needs to be inspected. A meticulous annual inspection of the cylinder, the firing mechanism and the bladder should be part of your routine, and a rearming kit aboard lets you put a jacket back in service after it fires or after the annual check.
The extras that earn their place
The bare 150N jacket is the legal minimum. A few additions turn it into something genuinely useful, and some matter especially for the kind of tidal, busy French waters you will be sailing.
- A crotch strap. Without it, a lifejacket rides up over your face when you are in the water, which can leave you breathing into the bladder instead of the air. It is cheap and it is the single most important upgrade. Fit one to every jacket.
- A light. A small water-activated light makes you findable at night, and there are ultra-compact units designed to sit under the lung of an automatic jacket and glow on contact with water. If you sail at night, and a night crossing of the Channel means hours in the dark, a light is not optional in spirit even where it is in law.
- A spray hood. In the chop of a tidal race it stops you drowning in spray while you wait, which in the Channel is a real risk, not a theoretical one.
Wear them, and clip on
A lifejacket in the locker has a buoyancy of zero. The harder truth behind all the regulation is behaviour: the jacket only works if you are wearing it when you fall, and falling is rarely something you plan. On deck at night, in heavy weather, or when sailing short-handed, wear the jacket and use the harness point to clip onto a jackstay so you do not go over in the first place. Recovering a person from the water in a tidal stream off the Cotentin is far harder than people imagine, which is why the harness matters as much as the buoyancy. I go into the recovery problem in man overboard in tidal waters of the Channel.
What to budget in 2026
A basic foam 100N jacket to ISO 12402-4 is inexpensive, often well under 50 euros, which is why there is no excuse for under-equipping children. A good adult automatic inflatable to 150N with a quality firing head sits in the rough range of 100 to 200 euros, more with a built-in harness and integrated light. A crotch strap is a few euros and the best money you will spend. Budget for rearming kits too, because a fired or out-of-date jacket is a non-compliant jacket.
What an inspection actually looks at
If the Gendarmerie Maritime stops you, the lifejacket check is quick but specific, so it helps to know what they want to see. They count jackets against people aboard, they read the buoyancy level on the label against your distance offshore, and they check that the jackets are the right CE-marked ISO 12402 type. On an inflatable they may look at the service indicator, the gas cylinder and the firing head, because a jacket with a fired or corroded cylinder is not a working jacket.
The fix is dull but reliable record-keeping. Service your inflatables annually, keep the rearming kit aboard, and check the little indicator windows on each firing head before the season starts. A green tab means armed and ready; a red one means the jacket will not inflate. It takes ten minutes across a boat's worth of jackets and it is the difference between passing a control and arguing on the pontoon.
A note for charter crews and those borrowing a boat: do not assume the jackets that came with it are compliant or serviced. I have opened lockers on chartered boats to find 50N buoyancy aids where 150N jackets were needed for the passage planned. Check every jacket yourself before you leave the berth, because in an inspection or an emergency the responsibility is yours, not the previous crew's.
Fit it into the wider plan
Lifejackets are the layer that keeps you alive long enough for the rest of the plan to work. They get you to the liferaft for French coastal work conscious and floating, and they buy the time for an epirb or plb registration in France to bring help to your position. None of the three works alone; together they are a system.
The short version
Match the buoyancy to your distance offshore: 50N inshore, 100N to 6 miles, 150N beyond. Put foam 100N jackets on children under 30 kg whatever the distance. Buy jackets marked to ISO 12402, fit a crotch strap and a light to every one, keep inflatables inspected and armed, and then do the one thing the rules cannot make you do, which is actually wear them when it matters. France checks the kit. The sea checks the habit.
