Boat Flag Etiquette: The Complete US Guide

By Nelson — Director & Owner, Waterline

I run Waterline, which means I spend my days looking at photographs of readers' boats — and I see a lot of flags flown wrong. An ensign left up all night. A tiny courtesy flag drowning under a beer-brand pennant. A gorgeous 48-foot sportfisherman with a US flag the size of a place-mat snapping off the tower.

None of it is illegal — flag use on American recreational boats is almost entirely custom and tradition, not law (there's exactly one hard legal rule, and I'll flag it clearly below). But getting it right is one of those quiet marks of a real boat owner. Here's everything, in plain English.

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The two American ensigns you can fly

On a US recreational boat you have two correct choices for your national colours:

1. The 50-star national ensign. The regular Stars and Stripes. Always correct, on any boat, in any water. If you ever leave US waters, this is the only one you may fly.

2. The US Yacht Ensign. The "Betsy Ross" design — 13 stars in a circle with a fouled anchor in the canton. You may fly this in place of the national ensign, but only on a recreational vessel in US domestic waters.

The one hard rule: The yacht ensign is domestic-only. Never fly the fouled-anchor ensign in foreign or international waters — swap to the 50-star national ensign before you go. This is the single most important thing on this page.

The yacht ensign was never actually legislated as a replacement; it gained recognition through a 1939 Navy Judge Advocate General opinion and survives today purely by custom. Either flag is "right" at home. Pick one — most owners fly the yacht ensign in home waters because it looks sharp, then switch to the national ensign for any offshore run to the Bahamas.

Where the ensign goes — powerboat vs sailboat

The stern is the position of honour. That's where your national colours belong.

Powerboat:

  • Stern staff when underway on inland waters — this is the standard, correct spot.
  • If your boat carries a mast and gaff, the proper position is at the gaff.
  • On a sportfisherman where a stern staff fouls the cockpit, custom allows a halyard just abaft the tuna tower.

Sailboat (this is where people slip up):

  • Under sail, Bermuda/Marconi rig: traditionally flown from the leech of the aftermost sail, about two-thirds of the way up from the clew.
  • Gaff-rigged: at the peak of the aftermost gaff.
  • Under power, or at anchor: a sailboat under engine is legally a powerboat, so the ensign goes to the stern staff. Same when you're anchored.

How big should your flag be?

The traditional rule is simple and worth memorising:

Ensign: one inch of fly (length) for every foot of your boat's overall length. On a sailboat, measure per foot of mainmast height above the water instead. The hoist (the vertical dimension) runs about two-thirds of the fly.

So a 40-foot powerboat wants roughly a 40-inch (≈ 24" × 40") ensign. An oversized flag doesn't look patriotic — it looks amateurish. Match the boat.

For the burgee and private signal, the rule is smaller: about ½ inch of fly per foot (mast height on a sailboat, overall length on a powerboat).

The sunset rule (when to fly, when to strike)

Colours are a daytime affair:

  • Fly the ensign from 0800 (8:00 a.m.) to sunset when your boat is at anchor or moored.
  • Underway, the common guidance is sunrise to sunset.
  • Tradition says you "make colours" — hoist smartly — at 0800, and lower them ceremoniously at sunset.
  • Take the ensign down at night. Leaving it up while anchored is the most common etiquette miss on the water.
  • One exception: while racing, the ensign comes down at the prep signal and goes back up at the finish.

The yacht club burgee

The burgee is the (usually triangular) flag identifying your yacht club or squadron — it represents your fleet.

  • Powerboat / mastless / single-masted boat: flown from the bow staff.
  • Two or more masts: at the top of the forwardmost mast.
  • Single-masted sailboat: traditionally the forwardmost masthead; the starboard spreader is the accepted modern alternative.
  • Only one burgee at a time. Never fly two clubs at once.

Your private signal

A private signal is the owner's own custom flag — a personal design, usually swallow-tailed. Traditionally it flies at the head of the mainmast, or on modern boats at the starboard spreader; on a mastless powerboat, from an antenna or the after end. The classic "full set" for a properly dressed boat is three flags: national ensign (your country), club burgee (your fleet), and private signal (you, the master).

This is exactly the kind of thing worth doing properly — a custom flag that's yours. (It's also, not coincidentally, the sort of thing we make at Waterline; see the custom boat flag.)

Officer flags

If you hold office in a yacht club or squadron, you fly a distinguishing officer flag in place of your private signal (and, on a single-masted boat, in place of the burgee). The near-universal US colour scheme:

  • Commodore — blue field
  • Vice Commodore — red field
  • Rear Commodore — white field

Designs typically carry stars and a fouled anchor. An officer flag may be flown day and night.

Courtesy flags & the Q flag abroad

Cross into another country's waters and two more flags come into play.

The courtesy flag. You fly the host nation's flag as a courtesy — at the starboard spreader (sailboat) or bow staff/starboard halyard (powerboat), flown above any other flag on that side. Your own ensign stays flying at the stern the whole time; the courtesy flag never replaces it.

The Q flag. On arrival, before you've cleared customs, you fly the plain yellow "Q" (Quebec) flag — it means "my vessel is healthy, I request clearance to enter." Fly it as soon as you enter the host country's territorial waters, somewhere clearly visible.

The order on arrival — and sailors genuinely argue about this, so I'll give you the conservative version: fly only the Q flag until customs and immigration clear you in (you haven't officially entered until then). Once cleared, lower the Q flag and raise the host-country courtesy flag. Some crews fly both together with the courtesy flag on top — do that if you like, but the Q-only-until-cleared approach is the tidiest.

Order of precedence

When you've got several flags up, this is the pecking order, most senior first:

1. National ensign (stern) — the senior position of all; first up, last down. 2. Foreign courtesy ensign (starboard spreader). 3. Club or squadron burgee (bow / forward masthead). 4. Officer flag or private signal (main masthead / starboard spreader). 5. Other signals (guest flag, meal pennants, etc.).

Making colours, you hoist the ensign first; lowering, the ensign is always the last to come down.

The mistakes I see most

  • Leaving the ensign up at night at anchor. Strike it at sunset.
  • Flying the fouled-anchor yacht ensign in foreign waters. Domestic only — switch to the 50-star flag.
  • An oversized flag. Follow the inch-per-foot rule.
  • A novelty flag in the ensign's position — pirate flags, beer pennants and sports flags never displace your national colours from the stern staff. Fly them elsewhere, if at all.
  • Flying two burgees, or a courtesy flag flown lower than another flag on the same side.
  • A tattered, sun-faded ensign. Retire worn flags — a faded flag undoes all the good.

Half-masting & dressing ship

Half-mast is flown only when directed by the President or a state governor (a club may half-mast its own burgee, not the national ensign, on its own initiative). The method: hoist smartly to the top first, then lower to the half-mast position; to bring it down for the day, re-hoist to the top, then lower fully.

Dressing ship is the full rainbow of International Code signal flags run stem-to-masthead-to-stern, for national holidays and regattas — done at anchor only, never underway. "Dressing ship" flies the ensign aft and the Union Jack at the bow; "full-dress ship" adds the whole rainbow of code flags.

FAQ

Where do I fly the American flag on my boat? From the stern staff on a powerboat — the position of honour. On a sailboat under sail, traditionally two-thirds up the leech of the aftermost sail; under power or at anchor, the stern staff.

What's the difference between the US ensign and the yacht ensign? The national ensign is the 50-star flag and is correct everywhere. The yacht ensign has 13 stars in a circle with a fouled anchor and may only be flown by recreational boats in US domestic waters.

What size flag does my boat need? Roughly one inch of flag length for every foot of boat length. A 30-foot boat wants about a 30-inch ensign.

Do I have to take my boat flag down at night? By tradition, yes — the ensign flies 0800 to sunset at anchor and is struck at night. Authorised day-and-night flags (like a squadron burgee or officer flag) are the exception.

What is the yellow flag on a boat? The Q (quarantine) flag — flown when arriving in a foreign country's waters to request clearance to enter.

Every boat deserves colours flown properly — and a mark that's genuinely its own. At Waterline we turn a photo of your exact boat into custom artwork, including a custom boat flag that's yours alone. See your boat drawn in seconds.

About the author: Nelson is the Director and Owner of Waterline, where a photo of your boat becomes custom artwork printed on gear built for the water.

Sources

  • Sea Flags — US Yachting Flags & Customs: seaflags.us/yachting
  • US Power Squadrons / America's Boating Club — Flag & Etiquette Committee; Operations Manual Ch. 12
  • BoatUS tradition / Flag & Banner — Boating Flag Traditions & Etiquette
  • Noonsite — Flag Etiquette; The Boat Galley — The Q Flag
  • Gettysburg Flag Works — Boat Flag Etiquette

Flag use on US recreational boats is governed by custom, not statute (with the exception of the domestic-only yacht ensign). Traditions vary slightly between clubs and regions.

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