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The buoy where the channels divide would be a red cylindrical can or pillar with a cylindrical top mark. Around the middle would be a green band. In IALA region B the shape would be identical, but the main colour would be green with a red band. [4] See the buoy by the island in the diagram above.
Mad Dog Spar Platform. A spar is a marine structure, used for floating oil/gas platforms.Named after navigation channel Spar buoys, spar platforms were developed as an extreme deepwater alternative to conventional platforms. [1]
The spar is the large cylindrical section of the buoy located under the surface of the water. At the bottom of the spar is a large heavy plate which stops the spar from moving with the waves. The float is able to move freely up and down the spar. [5] [6] The mooring is what anchors the buoy in place. The mooring connects to the spar through a ...
Approaching harbour port a vessel leaves port hand marks to port (left) and starboard hand marks to starboard (right). Port hand marks are cylindrical, starboard marks are conical. If the mark is a pillar or spar shape, then a topmark is fitted which is either cylindrical or conical as appropriate. [1]
Sonobuoy being loaded onto a USN P-3C Orion aircraft Hand deployment of a sonobuoy in the Arctic Ocean from the aft deck of the R/V Sikuliaq. A sonobuoy (a portmanteau of sonar and buoy) is a small expendable sonar buoy dropped from aircraft or ships for anti-submarine warfare or underwater acoustic research.
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A tension-leg platform (gray) under tow with seabed anchors (light gray) held up by cables (red) on left-hand side; platform with seabed anchors lowered and cables lightly tensioned on right-hand side Tension leg platform (gray) free floating on left-hand side; structure is pulled by the tensioned cables (red) down towards the seabed anchors (light-gray) on right-hand side (very simplified ...