What does a blue flag on a ship mean?
John Thompson
Updated on January 13, 2026
If you are an individual boat owner and you wish to make particular efforts towards a better environment, you can sign our Code of Conduct, and become part of our network. You will receive a Blue Flag for your boat, to show that you respect those rules, and that you are a proud lover of our oceans and coastline.
What do the different flags on a ship mean?
Two-flag Signals - Distress or Maneuvering. Three-Flag Signals - Points of the Compass, Standard-Times, Verbs, Punctuation, Code and Decode Signals. Four-Flag Signals - Geographic, Names of Ships, and Bearings. Five-Flag Signals - To Relate Position and Time.Is the Blue Peter flag still used?
Often said to be a corruption of “blue repeater”, there is actually no signal flag that goes by that designation. The use of the flag to spell the letter “P” dates from 1857 and so cannot have played a role in the origin of the term.What is the meaning of a blue and white flag on a vessel?
A blue-and-white International Code Flag A (or Alpha flag) must be displayed on boats involved in a diving activity.What flag does a ship fly when leaving port?
Blue Peter. Commonly flown by merchant ships to denote that the ship is about to sail and that all crew who may be out of the ship to return back to the ship immediately.F1 Explained: Blue Flag Rules
What does a black flag on a ship mean?
Ships carrying passengers infested with the plague flew a yellow and black checked flag to warn other vessels against approaching. The plague flag flown over infested ships in port. Despite popular belief, the black flag was actually a more welcoming site than the red flag to other vessels.What is the maritime flag for quarantine?
noun Nautical. a yellow flag, designating the letter Q in the International Code of Signals: flown by itself to signify that a ship has no disease on board and requests a pratique, or flown with another flag to signify that there is disease on board ship.What does a purple flag on a ship mean?
The Purple Flag Means it's a Shore Day.What does a red flag mean on a ship?
Down. The red flag with white diagonal stripe, while not international, is commonly used to indicate a diver in the water. Many states now require this flag. It is usually exhibited on a float to mark the diver's approximate location whereas the "A" flag should be used on the vessel.How many Blue Peter flags are there?
Adults can also get a Gold badge if they have done something extraordinary. Approximately 22,000 are distributed annually.How many flags does a Blue Peter boat have?
Two-flag signals are used to provide more specific information, partic- ularly in emergency situations or when maneuvering a vessel. Three-, four-, five-, six-, and even seven-flag signals are used to convey other types of information.What flag is blue with a white square in middle?
3." P is a square Blue flag with a White square in centre. Hoisted separately, it is known as the Departure flag and indicates that the vessel hoisting it is about to sail. Q is a square Yellow flag.What are the USMC colors?
MARINE CORPS FLAGScarlet and gold were established as the official colors of the Corps as early as 1925, and the Eagle, Globe, and Anchor emblem has appeared as part of Marine Corps iconography since 1868.
What is a Blue Peter flag?
Definition of blue peter: a blue signal flag with a white square in the center used to indicate that a merchant vessel is ready to sail.
What flags do boats fly?
Until clearance is obtained, a boat must fly the yellow'Q' flag. Often cruising sailors fly both the courtesy flag and the quarantine flag (Q flag below) on entering a foreign port. The courtesy flag is flown at the boat's starboard spreader, whether the ensign is at the stern staff, or flown from the leech.What does yellow flag on ship mean?
Medical Definition of quarantine flag: a yellow flag hoisted by all ships to request pratique on entering a harbor, by a ship to show that it has contagious or infectious disease aboard, or by a ship that has been quarantined. — called also yellow flag, yellow jack.