Courtesy Flag Etiquette: How to Fly Flags When Cruising the Bahamas and Caribbean
October 09, 2026A boat entering foreign waters announces itself with flags before anyone steps ashore. The sequence is simple: the yellow Q flag on arrival, the host country's courtesy flag once cleared, and the vessel's own national ensign at the stern throughout. Getting it wrong rarely causes legal trouble, but it is noticed on every dock from Bimini to the Grenadines. With the Bahamas and Caribbean season running from roughly October to April, the details below cover what US-flagged cruisers need before departure.
What Is a Courtesy Flag and Why Fly It?
A courtesy flag is a small version of the host country's flag or civil ensign, flown by a visiting vessel as a sign of respect while in that country's waters. The practice is a custom of the sea rather than an international treaty requirement, but many countries expect it, and its absence can be taken as discourtesy by officials and locals alike.
Three flags make up the cruising set:
| Flag | Purpose | When flown |
|---|---|---|
| Yellow Q flag | Signals a vessel arriving from abroad that has not yet cleared in | From entering territorial waters until clearance |
| Courtesy flag | Shows respect for the host country | After clearance, for as long as the vessel is in that country's waters |
| National ensign | Shows the vessel's own nationality | At the stern, throughout the visit |
The Arrival Sequence: Q Flag First, Courtesy Flag Second
The order matters more than any other detail. Using the Bahamas as the example, the Bahamas tourism authority's boating FAQ sets out the official steps:
- Hoist the yellow Q flag on entering Bahamian waters, heading for a designated port of entry.
- Notify Customs of the arrival. Only the captain may leave the boat until clearance is complete.
- Clear Customs and Immigration and obtain the cruising permit, which is required for all foreign private pleasure boats. Pre-clearance online through Click2Clear speeds the process.
- Lower the Q flag once cleared.
- Hoist the Bahamian courtesy flag and leave it flying for the rest of the stay.
A Q (Quebec) signal flag is plain yellow. In the International Code of Signals, it means the vessel is healthy and requests free pratique, which is why it doubles as the "not yet cleared" flag. The ANS guide to the International Code of Signals covers the rest of the signal-flag alphabet.
Which Flag Is the Correct Courtesy Flag?
Many countries have two flags: the national flag flown ashore and a civil ensign flown by merchant and private vessels. Where a civil ensign exists, it is the correct courtesy flag at sea.
The Bahamas is the clearest example in the region. Its civil ensign is a red ensign with a white cross and the national flag in the upper corner, and ANS sells it as the Bahamas Courtesy Flag (Civil Red Ensign). British Overseas Territories typically use a red ensign with the territory's badge, which is why ANS lists a British Virgin Islands Red Ensign Courtesy Flag and a Cayman Islands Red Ensign alongside their national flags.
A quick buying check:
- Confirm whether the destination has a separate civil ensign before ordering.
- Buy one courtesy flag for every country on the itinerary.
- Visits to Puerto Rico and the US Virgin Islands are US waters for a US-flagged boat, so no foreign courtesy flag applies.
Courtesy flags for the islands most cruisers visit are grouped in the ANS Caribbean flags collection, with the full range in the international flags collection.
Where to Fly the Courtesy Flag and What Size to Buy
According to America's Boating Club flag etiquette guidance, the courtesy flag position depends on the boat:
- Sailboats: single-hoisted on the outboard signal halyard of the starboard spreader of the main mast
- Powerboats without a mast: at the bow staff, in place of a club burgee
- Powerboats with a signal mast: on the starboard spreader or yardarm of that mast
The same guidance sets one firm rule: no other flag goes on the same halyard as the courtesy flag, or on a halyard to starboard of it. Club burgees and private signals move elsewhere while abroad, and the Q flag comes down before the courtesy flag goes up.
Size follows simple ratios:
| Flag | Rule of thumb |
|---|---|
| National ensign at the stern | 1 inch on the fly for each foot of overall length |
| Courtesy flag, sailboat | About 1/2 inch on the fly for each foot of masthead height above the waterline |
| Courtesy flag, powerboat | About 5/8 inch on the fly for each foot of overall length |
For example, a sailboat with a masthead 48 feet above the water calls for a courtesy flag about 24 inches on the fly, which matches a 16 by 24 inch flag. A courtesy flag noticeably larger or smaller than this reads as careless, as does a faded or frayed one.
The National Ensign While Abroad
The home ensign stays at the stern throughout a foreign visit, and two rules catch US boaters out:
- Fly the US national flag, not the US yacht ensign, in foreign waters. The yacht ensign, with its fouled anchor in a circle of stars, has no standing as a national ensign abroad.
- Fly the ensign from 0800 until sunset, and when entering or leaving port, weather and rig permitting.
The ANS US yacht ensign is for US waters only. Positioning the US flag alongside burgees, state flags, and signal flags on different boat types is covered in detail in the ANS guide to American flag display rules on vessels.
Leaving the Country and Common Mistakes
Take the courtesy flag down when leaving the host country's waters, and raise the next country's Q flag and courtesy flag in turn. Courtesy flags should not stay up as souvenirs after returning to US waters.
Mistakes that cruisers make most often:
- Hoisting the courtesy flag before clearing in, instead of the Q flag
- Flying the national flag where a civil ensign is the correct courtesy flag
- Flying the courtesy flag below a club burgee or another flag on the same halyard
- Flying a faded, frayed, or oversized courtesy flag
- Flying the US yacht ensign instead of the US national flag abroad
- Leaving the last country's courtesy flag up after arriving somewhere new
Charts, cruising guides, and passage planning for the same waters are covered in the ANS overview of Bahamas and Caribbean cruising guides, and country flag meanings are explained in the guide to flags of the Caribbean.
Shop Courtesy Flags and Ensigns
A set of courtesy flags for every stop, a yellow Q flag, and a US national flag in good condition cover the flag side of a Bahamas or Caribbean season.
Shop courtesy flags and ensigns in the ANS international flags collection, or contact ANS at +1 (954) 522-3321 or sales@amnautical.com for help building a cruising flag set.
Frequently Asked Questions
Here are direct answers to the questions cruisers ask most about flag etiquette abroad.
Do I need a courtesy flag when entering a foreign port?
Most countries expect one by custom, though it is not an international legal requirement. Fly the yellow Q flag on arrival, then the host country's courtesy flag once cleared.
Where should the courtesy flag be flown on a boat?
On a sailboat, from the starboard spreader of the main mast. On a powerboat without a mast, from the bow staff, and on one with a signal mast, from its starboard spreader or yardarm. No other flag should share its halyard.
Where should the national ensign be flown on a boat?
At the stern, from 0800 until sunset and when entering or leaving port. US boats abroad fly the US national flag rather than the US yacht ensign.
What is the correct courtesy flag for the Bahamas?
The Bahamian civil ensign: a red ensign with a white cross and the national flag in the upper corner.
When should the yellow Q flag come down?
As soon as Customs and Immigration clearance is complete. The courtesy flag goes up after the Q flag comes down.
What size courtesy flag do I need?
About 1/2 inch on the fly per foot of masthead height above the waterline for a sailboat, or about 5/8 inch per foot of overall length for a powerboat.