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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. Danlayer - Wikipedia

   en.wikipedia.org/wiki/Danlayer

   A dan is a marker buoy which consists of a long pole moored to the seabed and fitted to float vertically, usually with a coded flag at the top. Dan laying was an important part of minesweeping, and boats were fitted specifically for this purpose.

4. Navigation marker goes missing off Florida Keys. Then, it ...

   www.aol.com/navigation-marker-goes-missing-off...

   Navigation marker goes missing off Florida Keys. Then, it shows up 4,300 miles away. Mark Price. April 15, 2024 at 9:12 AM ... The bright-yellow buoy — part of a “Fishing Lobstering Collecting ...

5. Diving equipment - Wikipedia

   en.wikipedia.org/wiki/Diving_equipment

   Diving reel, dive spool or line holder to store and transport a distance line or line for a surface marker buoy. A dive spool, or line spool, is a short cylindrical tube with a large flange at each end, around which a length of line can be wound, and a line holder is a flat H-shaped frame or piece of rigid sheet material on which a length of ...

6. Distance line - Wikipedia

   en.wikipedia.org/wiki/Distance_line

   Line markers are used for orientation as a visual and tactile reference on a permanent guide line. Directional markers (commonly arrows), are also known as line arrows or Dorff arrows, and point the way to an exit. Line arrows may mark the location of a "jump" location in a cave when two are placed adjacent to each other.

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.