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2. Surface marker buoy - Wikipedia

   en.wikipedia.org/wiki/Surface_marker_buoy

   A delayed surface marker buoy (DSMB), decompression buoy, or deco buoy is an inflatable buoy which can be deployed while the diver is submerged and generally only towards the end of the dive. The buoy marks the diver's position underwater so the dive boat crew can locate the diver even though the diver may have drifted some distance from the ...

3. 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.

4. Marker buoy - Wikipedia

   en.wikipedia.org/wiki/Marker_buoy

   Marker buoy may refer to: Surface marker buoy used by divers; A floating sea mark; A light- or smoke-emitting buoy used in naval warfare This page was last edited on ...

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. 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).

7. 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.