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  2. Safe water mark - Wikipedia

    en.wikipedia.org/wiki/Safe_water_mark

    They are also known as fairway buoys and clear water buoys. They are recognisable by their red-and-white vertical stripes and commonly bear a top sign in shape of a red ball. They either flash Morse code "A" (di-dah), or one long flash, occulting (more light than dark) or isophase (equal light and dark) every 10 seconds (L Fl 10s).

  3. Cardinal mark - Wikipedia

    en.wikipedia.org/wiki/Cardinal_mark

    A cardinal mark is a sea mark (a buoy or other floating or fixed structure) commonly used in maritime pilotage to indicate the position of a hazard and the direction of safe water. Cardinal marks indicate the direction of safety as a cardinal ( compass ) direction ( north , east , south or west ) relative to the mark.

  4. Buoy - Wikipedia

    en.wikipedia.org/wiki/Buoy

    Marker buoys, used in naval warfare (particularly anti-submarine warfare) emit light and/or smoke using pyrotechnic devices to create the flare and smoke. Commonly 3 inches (76 mm) in diameter and about 20 inches (500 mm) long, they are activated by contact with seawater and float on the surface.

  5. How do boaters avoid hazards? What to know about markers ...

    www.aol.com/boaters-avoid-hazards-know-markers...

    Just like traffic lights and signs help drivers on the road, boaters have buoys and signs to guide them to and from shore safely.

  6. Emergency wreck buoy - Wikipedia

    en.wikipedia.org/wiki/Emergency_Wreck_Buoy

    The buoy is expected to be deployed for the first 24-72 hours after the wreck occurs. After that time more permanent buoyage (such as isolated danger marks or cardinal marks) should be deployed and charts updated. [1] The buoy is designed to "provide a clear and unambiguous" [1] mark of a new and uncharted danger. The buoy is painted with 4, 6 ...

  7. Navigational aid - Wikipedia

    en.wikipedia.org/wiki/Navigational_aid

    A navigational aid (NAVAID), also known as aid to navigation (ATON), is any sort of signal, markers or guidance equipment which aids the traveler in navigation, usually nautical or aviation travel. Common types of such aids include lighthouses, buoys, fog signals, and day beacons.

  8. Glossary of nautical terms (A–L) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    anchor buoy A small buoy secured to a line attached to the crown of an anchor. The line allows the anchor to be unhooked from an obstruction, such as a rock or another vessel's anchor cable, so preventing raising the anchor in the normal way. [13] anchor chain . Also anchor cable. A chain connecting a ship to an anchor. anchor detail

  9. Lateral mark - Wikipedia

    en.wikipedia.org/wiki/Lateral_mark

    A lateral buoy, lateral post or lateral mark, as defined by the International Association of Marine Aids to Navigation and Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the edge of a channel. Each mark indicates the edge of the safe water channel in terms of port (left-hand) or starboard (right-hand).

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