A courtesy flag is flown by a visiting boat to show respect for the country or territory being visited. It is especially common when cruising internationally.
Where Should It Be Flown?
On a powerboat, the courtesy flag is traditionally displayed from a staff or halyard on the starboard side of the boat, usually where it can be clearly seen.
On a sailing yacht, the courtesy flag is commonly flown from the starboard spreader, below the starboard spreader flag or other appropriate rigging point.
The exact location can vary depending on the boat's rig, flag arrangement, and local maritime customs. The important point is that the courtesy flag should be displayed prominently and respectfully.
What About The U.S. Flag?
When an American boat is visiting another country, the U.S. yacht ensign remains the vessel's national ensign, while the host country's flag is displayed as the courtesy flag.
The courtesy flag should not replace the vessel's national ensign.
A Good Rule For Boaters
Display the courtesy flag before entering the territorial waters or port of the country you are visiting, and keep it flying while you are in that country.
Courtesy flags are a small but important part of international boating etiquette. Flying the correct flag in the proper location shows respect for the country you are visiting and helps demonstrate good seamanship.