There are two kinds of visiting boat in a French marina. One flies a crisp French Tricolore from the starboard spreader and a clean ensign at the stern. The other flies a sun-bleached rag the colour of weak tea, hoisted upside down, with a bit of bird mess on it. Both will be left alone by the authorities most of the time. Only one looks like it knows what it is doing, and in a country where the local boating culture takes flags seriously, looking like you know what you are doing buys you goodwill in a packed August port.
This is a gear article, not an etiquette lecture. For the full why-and-when of flying the Tricolore, read our piece on the courtesy flag france and the Q flag. What follows is the kit: which flags, what size, what fixings, and how to make a set last more than one summer.
The flags you actually need
A correctly dressed visiting boat in France carries three flags, and most people get the first two right and forget the third.
Your national ensign goes at the stern, on a staff or from the backstay. It is the legal statement of where your boat is registered, and it is the one flag you must not skimp on. A British boat flies the Red Ensign, a Dutch boat its tricolour, and so on.
The French courtesy flag, the Tricolore in maritime proportions, goes high, traditionally from the starboard spreader. It is a gesture to the host nation, not a replacement for your ensign.
The yellow Q flag is the one people forget. If you are arriving from outside the EU, the UK since Brexit being the obvious example, you fly the plain yellow Q on entering French waters and keep it up until you are cleared in. The detail sits in our guide to clearing customs arriving france boat, and it matters because the Q is part of a legal process, not decoration.
Sizing: not too big, not too small
There is a rough convention worth following. An ensign should be about one inch on the fly for every foot of boat length overall, so a 30-foot boat wants an ensign roughly 30 inches on the fly, often quoted as a 3/4-yard or 1-yard flag. A courtesy flag is smaller, typically half to two thirds the size of the ensign, because it flies from a spreader where a large flag both looks pompous and shreds faster.
For a typical 9 to 12-metre cruising boat, that lands you at an ensign around 70 to 90cm on the fly and a courtesy flag around 30 by 45cm. Buy the courtesy flag a size down from what you think, because a spreader flag lives in the wind every hour you are afloat and a big one is just more sail area to flog itself to bits.
Material: this is where flags live or die
The difference between a flag that survives a season and one that disintegrates by July is the cloth. There are three common types.
- Printed polyester, the cheapest, often sold to tourists. Colours fade fast in Mediterranean sun and the cloth frays at the fly within weeks. Fine for a one-week charter, false economy for a season.
- Woven polyester, sometimes called spun polyester, heavier and more UV-stable, with the colour through the weave rather than printed on the surface. This is the sweet spot for a cruising boat: a good one runs roughly 20 to 40 euros for an ensign and lasts two to three seasons.
- Sewn woven flags, the most durable and the most expensive, with stitched panels rather than printed. Worth it for a permanent ensign you fly every day.
In a French summer, UV is the killer. The same 2025 conditions that pushed the Mediterranean to record warmth come with long, fierce sun, and a printed flag flown daily can be unreadable by September. Spend on cloth, not on a bigger flag.
Fixings that do not chafe through
A flag fails at three points: the halyard, the clips, and the fly. Sort all three.
For the courtesy flag, run a thin spreader flag halyard, 2 to 3mm pre-stretched line, with a small block or just a fairlead at the spreader end. Use two flag clips, the inglefield clip-and-eye type or simple plastic clips, and seize the line so the flag sits just clear of the spreader without flogging against it. A flag that slaps a rigging wire all day saws through its own hoist in days.
For the ensign, a stern staff with a socket is the tidiest solution, but a backstay flag halyard works on most rigs. Either way, fit a swivel so the flag can turn with the wind rather than wrapping itself round the line.
Carry spares. A small ziplock bag with two spare flag clips, a metre of spare 2mm line, and a sailmaker's needle and waxed thread lets you re-hem a frayed fly in ten minutes. Treat it as part of your wider boat spares kit france rather than a separate fuss.
Stowing flags so they last
Flags die in the locker as fast as they die on the rig if you stow them wet and crumpled. The cloth holds salt, the salt holds damp, and a folded woven flag left in a plastic bag grows the same mould that ruins wet weather gear. The fix is dull and effective: when you take a flag down for a passage or for winter, rinse it in fresh water if it has been flying in salt spray, let it dry fully, and roll it rather than fold it so the creases do not become permanent wear lines.
Keep each flag in its own labelled bag, the ensign in one, the courtesy flag in another, the Q in a third, so you are never untangling a knot of flags on a wet foredeck. I keep the courtesy flag and the Q together near the chart table because those are the two I hoist and lower most, and the ensign with the boat's papers because it tends to stay up. A flag that is easy to find is a flag you actually fly correctly, and the whole point of a tidy set is undermined the moment you cannot lay hands on the right one when you cross into French waters.
The Q flag sequence, in gear terms
If you arrive from outside the EU, the practical drill is simple. Before you reach French waters, bend the yellow Q onto the starboard spreader halyard, ready. Hoist it as you cross into territorial waters. Leave the French courtesy flag bagged. Once customs and immigration clear you, lower the Q and hoist the Tricolore in its place. Keep the Q flag clean and dry in its bag between trips, because a grubby yellow flag reads as a careless boat to anyone who knows the signal.
EU-flagged boats coasting in from Belgium or Spain skip the Q entirely and just hoist the courtesy flag on entering French waters.
My set, and the mistakes I stopped making
I carry a woven Red Ensign about 80cm on the fly on a stern staff with a swivel, a woven Tricolore courtesy flag around 30 by 45cm on a dedicated 2mm spreader halyard with two clips, and a yellow Q flag in a dry bag with the ship's papers. The whole lot cost under 80 euros and is now into its third season looking respectable.
The mistakes I made early were all avoidable. I bought printed flags and watched them fade. I bought the courtesy flag too big and it flogged itself ragged. I flew the ensign from a backstay with no swivel and it wrapped daily. And once, embarrassingly, I left the Q flag up for two days after clearing in at Cherbourg because I had no system for it. Get the cloth right, size the courtesy flag down, fit swivels and clips that do not chafe, and keep the Q where you can find it. A tidy flag set is the cheapest way to look like a competent visiting boat, and competence is currency in a French port.
