Sailboat Flag Etiquette: What You Need to Know

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An experienced sailboat skipper will know that flag etiquette is a way of showing respect, courtesy and recognition to other vessels, countries and organizations.

It also helps you communicate important information, such as your nationality, your club affiliation, your intentions or your distress.

For the less experienced we'll explain the basics of sailboat flag etiquette and how it should be applied in practice:

• The types of flags that you can fly on your boat;

• The sizes and positions of the flags;

• The occasions and situations when you should fly certain flags;

• The common mistakes and pitfalls to avoid when flying flags.

The skipper of the Bowman 57 staysail ketch shown here is correctly flying a burgee (the Flying Fish burgee of the Ocean Cruising Club) from the port spreader, and a courtesy ensign (of Spain in this case) from the starboard spreader.

The ensign, in this case that of the Republic of Ireland, is flown from a flag halyard fom the mizzen mast to the end of the missen boom. Alternatively the ensign could be flown from a staff attached to the taffrail.

The Types of Flags

There are many types of flags that you can fly on your boat, but the most common ones are:

• The ensign: This is the flag that shows the country of registry of your boat and indicates its nationality. It is usually flown at the stern of the boat, as close as possible to the waterline. It is the most senior position for a flag on a boat and it should always be larger than any other flag. A UK flagged boat (sail or power) must wear the national maritime flag, the Red Ensign, unless entitled to wear a special ensign.

Club burgee correctly flown at the masthead

• The burgee: This is the flag that shows the yacht club or association that you belong to. It is usually flown at the main masthead of the boat above any other flag, but can be flown from the port spreader unless otherwise stipulated under a special warrant. 

• The courtesy flag: This is the flag that shows the national flag of the country that you are visiting or whose waters you are sailing in. It is a sign of respect and goodwill to the host country and it should be flown at the starboard spreader. It should be hoisted as soon as you enter foreign waters and lowered as soon as you leave them.

• The Q flag: This is a yellow flag that indicates that you are requesting clearance from the local authorities when entering a foreign port. It is also flown at the starboard spreader of the boat, below the courtesy flag if there is one. It should be hoisted before you enter the port and lowered after you have been cleared.

• The signal flags: These are flags that have specific meanings in the International Code of Signals. They can be used to spell out messages or to convey information such as your position, your course, your speed, your intentions or your distress. They can be flown individually or in combinations at various locations on the boat.

• The private signal: This is a personal or family flag that has no official meaning or recognition. It can be flown at the port spreader of the boat, below any other flag. It is optional and purely decorative.

The Sizes and Positions of the Flags

The sizes and positions of the flags on your boat are important for both aesthetic and practical reasons. They should be proportionate to your boat size, visible from a distance and clear from any obstruction.

The general rules for sizing and positioning flags are:

• The ensign should be one inch on the fly (the length) for every foot of overall length of your boat. It should be flown on the stern staff or on a gaff if there is one.

The ensign flown at the mizzen masthead? Definitely not in accordance with the regulations!

• The burgee should be half an inch on the fly for every foot of overall length of your sailboat or five-eighths of an inch for every foot of overall length of your powerboat. It should be flown at the main masthead or on a pigstick (a vertical extension) if there is one.

• The courtesy flag should be the same size as the burgee or slightly smaller. It should be flown at the starboard spreader, preferably on its own halyard.

• The Q flag should be the same size as the courtesy flag or slightly smaller. It should be flown at the starboard spreader, below the courtesy flag if there is one, on its own halyard.

• The signal flags should be sized according to their function and meaning. They can be flown individually or in combinations at various locations on the boat, such as the masthead, the yardarm, the bow or the stern of the boat.

• The private signal should be the same size as the burgee or slightly smaller. It should be flown at the port spreader, below any other flag, on its own halyard.

The Occasions and Situations When You Should Fly Certain Flags

The occasions and situations when you should fly certain flags on your boat depend on where you are, what you are doing and who you are with. Some flags are mandatory, some are optional and some are forbidden.

The general rules for flying flags are:

• You must fly your ensign at all times in daylight, especially when near to or in sight of land or another boat. You must also fly your ensign when entering or leaving a foreign port and on demand. You can fly your ensign at night if you wish, but it is not required.

• You can fly your burgee at any time, but it is customary to hoist it at 0800 and lower it at sunset. You can also fly your burgee at night if you wish, but it is not required.

• You must fly the courtesy flag of the country that you are visiting or whose waters you are sailing in as soon as you enter their jurisdiction and until you leave it. You must also fly the Q flag when entering a foreign port until you have been cleared by the local authorities. You can lower the Q flag after you have been cleared, but you should keep the courtesy flag until you leave the port or the country.

• You can fly signal flags whenever you need to communicate with other boats or shore stations using the International Code of Signals. You can also fly signal flags for decorative purposes, such as dressing your boat for a special occasion, but you should avoid using flags that have specific meanings or that could cause confusion.

• You can fly your private signal whenever you want, but it has no official significance or recognition. It is purely a personal or family emblem.

The Common Mistakes and Pitfalls to Avoid When Flying Flags

Flying flags on your boat can be fun and rewarding, but it can also be tricky and challenging. There are some common mistakes and pitfalls that you should avoid when flying flags, such as:

• Flying an incorrect, damaged, wrongly sized or otherwise invalid ensign. This is a breach of law and etiquette and could lead to fines or penalties.

• Flying a special ensign without being entitled to do so. This is a privilege granted by a warrant from the Admiralty or by an Act of Parliament and it requires certain conditions to be met.

• Flying a burgee that does not match your ensign or that is higher than your ensign. This is a sign of disrespect and ignorance and could offend other boats or authorities.

• Flying more than one burgee at a time. This is considered sloppy and excessive and could imply that you are showing off or indecisive.

• Flying a courtesy flag that is larger than your burgee or that is above your burgee on the same halyard. This is a sign of subservience and inferiority and could insult your own country or club.

• Flying a Q flag when you have already been cleared or when you are leaving a port. This is unnecessary and confusing and could cause delays or misunderstandings.

• Flying signal flags that have specific meanings or that could cause confusion for decorative purposes. This is irresponsible and dangerous and could lead to accidents or incidents.

• Flying a private signal that resembles an official flag or that has an offensive meaning. This is misleading and rude and could provoke anger or hostility.

• And you should never, ever, fly a skull-and-crossbones flag. There is nothing amusing or glamorous about pirates.