There is a story every UK sailor swaps in a French bar: someone got fined for not carrying the French safety kit, or someone else waved their red ensign at a customs officer and was sent on their way. Both stories are usually third-hand, and both miss the same point. The question of whether French rules bind your foreign-flagged boat does not have one clean answer. It has a legal answer, a practical answer, and a gap between them that you need to manage.
I have cruised France on a British registration for years, and I have stopped trying to win the argument on principle. Here is how it actually works.
The starting principle: your flag is your law
Under the long-standing law of the sea, a vessel carries the law of the state whose flag it flies. For most equipment and competence questions, a UK-flagged boat answers to UK rules, a Dutch boat to Dutch rules, a US boat to US rules. France's headline safety regulation, Division 240, is written for French-flagged pleasure craft under 24 metres. It does not, on its face, command a British boat to carry French kit.
That is the comforting version. Sailors who stop reading there get into trouble, because the principle has limits and France has its own view in its own waters.
Where it gets murky
The RYA went to the trouble of getting French legal advice on precisely how French domestic equipment rules apply to UK-registered recreational vessels. Their conclusion was blunt: the position "is not entirely clear in law". That is a careful organisation telling you there is no clean exemption to wave around.
A coastal state has genuine authority over foreign vessels in its territorial sea, which extends 12 nautical miles from the baseline. France can and does inspect visiting boats, particularly through the Gendarmerie Maritime and the customs service. They are usually checking the things that keep people alive and the things that catch smugglers, not auditing your compliance with a French decree clause by clause. But the line between "France cannot impose Division 240 on you" and "France can stop you and ask hard questions about your safety equipment" is thin, and you do not want to be the test case.
Competence: where France points back at your flag
On the question of qualifications, France is actually clearer, and it points the question straight back at your home country. French rules expect the skipper of a visiting foreign-flagged boat to hold whatever boating qualifications or certificates their own flag state requires of them. For a UK-registered boat under 24 metres in coastal waters, the UK requires no licence at all, so France imposes none either. You do not need a French permis to sail your own British boat along the Cote d'Azur.
Two caveats bite hard. First, chartering is different: hire a French-flagged boat and you step into French requirements, including evidence of competence. Second, the inland waterways are a separate world. On the canals and rivers, France effectively expects a recognised certificate, and the practical standard is the ICC with the CEVNI endorsement, as I explain in the CEVNI and ICC licence guide for French waterways. Salt-water freedom does not follow you up the Canal du Midi.
The equipment question in practice
So should you carry the French safety kit even though Division 240 may not strictly bind you? Yes, and not just to avoid a fuss. The RYA's own recommendation, which matches what experienced cruisers do, is to make every reasonable effort to comply with the French rules that fit your area and type of navigation.
The reason is simple. Division 240 sorts equipment into categories by distance from a safe shelter: up to 2 miles, 2 to 6 miles, 6 to 60 miles, and beyond 60 miles. The full breakdown is in the Division 240 guide for visiting boats. If you build your boat to the coastal or semi-offshore standard, you are carrying lifejackets for everyone, a way to call for help, fire-fighting gear, and in-date flares. An officer who comes aboard sees a properly found boat and moves on. You also have the kit you would actually want if things go wrong, which no flag-state technicality will provide when you are taking water 8 miles out.
What officials actually look at
In years of being checked, perhaps half a dozen times, nobody has ever recited Division 240 article numbers at me. They have looked at four things. Do you have a lifejacket per person, and are people in tidal or rough conditions wearing them? Can you call for help, meaning a working VHF and, increasingly, the licence to use it? Can you fight a fire? Are your pyrotechnics in date?
Those four map neatly onto specific French rules, and each has a wrinkle that catches visitors. The flares have disposal and carriage quirks, covered in carrying and disposing of flares in France. The lifejackets have buoyancy ratings France cares about, set out in the lifejacket and harness rules. And the radio needs paperwork as well as a power supply, explained in the VHF licence, DSC and MMSI guide.
The 12-mile line, and what lies beyond it
It helps to picture three zones. Inside French internal waters and the 12-nautical-mile territorial sea, France is the coastal state and has real enforcement power over visiting boats, even if its safety regulation was written with French-flagged craft in mind. This is where checks happen and where carrying the French-category kit is plainly the sensible move. Between 12 and 24 miles lies the contiguous zone, where France retains limited powers, chiefly over customs, immigration and similar matters rather than your lifejacket count. Beyond that, on the high seas, your flag state's law governs almost everything.
For the cruising sailor this means the practical pressure to comply with French equipment expectations is highest exactly where you spend most of your time: hopping between ports a few miles apart, well inside the territorial sea. There is no point relying on a flag-state argument in the one zone where the coastal state's authority is strongest.
A note on charter and ownership scenarios
The flag question shifts the instant the boat is not your own foreign-registered vessel. Step aboard a French-flagged charter boat and you are operating a French vessel, so French requirements, including evidence of competence, apply to you directly. Buy a boat and keep it in France long-term and you eventually run into registration, VAT and residence questions that have nothing to do with safety law but everything to do with which country's rules attach to the hull. Those are separate rabbit holes I will not open here, but flag them in your planning, because "my boat is British so French rules do not apply" is a sentence that quietly stops being true the longer the boat sits in a French marina.
Documents, because they ask for those too
Carry your registration document, your insurance certificate, and your radio licence if you have a fixed VHF. France can ask, and the Gendarmerie Maritime in particular is interested in whether the boat is what its papers say it is. Post-Brexit, a UK boat also has VAT status and temporary-admission questions that have nothing to do with safety but everything to do with a smooth visit, a subject I will not reopen here.
The honest conclusion
Do French rules apply to your foreign-flagged boat? On qualifications at sea, France defers to your flag, which for most UK and EU leisure sailors means little or no licence requirement. On equipment, the legal position is genuinely unclear, France has real authority in its 12-mile territorial sea, and the only sane response is to carry the French-category kit anyway. Arguing the law with a customs officer is a way to spend an afternoon you wanted to spend at anchor. Equip the boat properly, keep the documents handy, and the flag question rarely surfaces at all.
Sources: RYA country-specific advice for France (rya.org.uk); Division 240 (Ministere de la Mer / mer.gouv.fr); UNCLOS territorial sea provisions.
