BOAT-COMPARATOR Guide
License-free boating in France: the 6 hp engine limit, explained
Where the 6 hp (4.5 kW) cap comes from, how it's measured, what it actually lets you do on the water, and what changes if you want more power.
It's the number that shows up in every "license-free" listing in France: 6 horsepower, or its metric equivalent, 4.5 kW. Plenty of renters book this category without really understanding what the cap covers, or why it exists. Here's what you need to know before you set off.
A limit on the engine, not the hull
The 6 hp cap applies to installed engine power, not to the size of the boat. A 5-metre rigid-hull inflatable and a small 3-metre tender can both qualify as "license-free", as long as neither engine exceeds that threshold. In metric terms, 6 hp works out to roughly 4.4 kW — operators almost always round it to 4.5 kW, the figure printed on the engine plate and on the boat's spec sheet.
Why a power cap instead of a written test
The logic behind the rule is straightforward: below a certain power threshold, top speed stays modest (typically 10 to 15 knots depending on hull and load), which mechanically limits how bad a collision can be and leaves more time to react. That trade-off — no exam, but a capped engine and daytime sailing within a limited distance from shore — is what lets a first-timer legally take the helm after a 15- to 30-minute briefing from the rental operator.
What the power cap doesn't cover
A 6 hp engine doesn't exempt you from anything else: license-free boating is daytime only, confined to a limited area (often 2 to 6 nautical miles from a safe harbour, per the chart handed over by the operator), and a lifejacket stays compulsory on board for every passenger. The operator can also tighten the boundaries further based on the day's forecast or the crew's stated experience.
Can you bump up the power once at sea?
No — and it's a point many renters overlook. The engine is sealed or electronically capped by the manufacturer so it can't actually exceed 6 hp, whatever the rev counter shows. Tampering with that limiter is an offence and effectively voids the boat's insurance: after an accident, the policy can be treated as void because the boat was being operated outside the legal framework that justified going without a license in the first place.
A very French limit, not a universal one
The 6 hp threshold is specific to French regulations and doesn't carry over as-is elsewhere in Europe: in Greece, license-free boating goes up to 30 hp (about 22 kW), while Croatia requires a licence regardless of engine power. That lack of harmonisation isn't limited to engine power limits either — a 2014 study by Torralbo, J. and Castells, M., published in TransNav, International Journal on Marine Navigation and Safety of Sea Transportation, found that safety equipment rules and inspection requirements for recreational craft vary just as widely from one EU member state to another, in the absence of a unified European framework (see the study on Google Scholar). Always check the destination country's own rule before booking abroad, rather than assuming the French threshold applies everywhere.
The license-free threshold, country by country
| Country | License-free threshold | Conditions |
|---|---|---|
| France | 6 hp (4.5 kW) | No exam; briefing from the operator; daytime only, limited zone (often 2 to 6 nautical miles from a safe harbour) |
| Greece | Up to 30 hp (about 22 kW) | Briefing and signed waiver; the local port police keeps the final say on the exact zone and power allowed |
| Italy (at sea, under 10 m) | Up to 40.8 hp (30 kW) | No exam; briefing; usually 18 or over; up to 6 nautical miles from the coast |
| Spain | 15 hp, under 5 metres | Daytime only, within 2 nautical miles of a safe harbour; beyond that, a French coastal licence or a skipper is required |
| Croatia | No license-free threshold | A recognised licence (French coastal licence, ICC…) or a skipper on board is compulsory, whatever the engine power |
| Portugal | No license-free threshold in practice | A carta de navegador is generally required to skipper a motorboat yourself; the market is dominated by skippered trips |
This table summarises what we observe rental platform by rental platform and carries no regulatory weight: the rule that applies is always the one in force on the day of the rental — confirm it with the operator or the local maritime authority before booking abroad.
What if 6 hp isn't enough?
For a faster boat, a trip further from shore, or simply more thrill, you'll need a licence. The French coastal licence is usually earned in a single day of training for around €350, and opens up access to far more powerful motorboats within the same 6-nautical-mile coastal limit. For sailing charters abroad, the ICC remains the most widely recognised credential. Our guide on the difference between the coastal and inland waterways licences helps you pick the right one for your trip.
Where a 6 hp engine shines
A 6 hp-capped engine is a great match for sheltered waters and short hops: Arcachon Bay, the Gulf of Morbihan, the Glénan Islands or the Porquerolles roadstead from Giens are all easy to explore at that gentle pace, with no need for anything more powerful.
Compare before you book
On Boat-Comparator, every "license-free" listing clearly states the engine's power and the permitted sailing area: compare offers from Boataround, SamBoat and Click&Boat in a single search to find the right boat for your trip, licence or no licence.
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