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2. Underwater construction - Wikipedia

   en.wikipedia.org/wiki/Underwater_construction

   Underwater demolition, for removal of damaged structure in repair work, or to prepare an area for new construction. Underwater surveying : site surveys and geological surveys Underwater inspection of underwater structures, installations, and sites is a common diving activity, applicable to planning, installation, and maintenance phases, but the ...

3. Hyperbaric welding - Wikipedia

   en.wikipedia.org/wiki/Hyperbaric_welding

   Underwater welding can be the least expensive option for marine maintenance and repair, because it bypasses the need to pull the structure out of the sea and saves valuable time and dry docking costs. It also enables emergency repairs to allow the damaged structure to be safely transported to dry facilities for permanent repair or scrapping.

4. Underwater diving environment - Wikipedia

   en.wikipedia.org/wiki/Underwater_diving_environment

   Most underwater diving is done in the shallower coastal parts of the oceans, and inland bodies of fresh water, including lakes, dams, quarries, rivers, springs, flooded caves, reservoirs, tanks, swimming pools, and canals, but may also be done in large bore ducting and sewers, power station cooling systems, cargo and ballast tanks of ships, and ...

5. Underwater cutting and welding - Wikipedia

   en.wikipedia.org/wiki/Underwater_cutting_and_welding

   Underwater construction is industrial construction in an underwater environment. There is often, but not necessarily, a significant component of commercial diving involved. [2] [3] It is a part of the marine construction industry. [4] Underwater welding may be used, and for repair work cutting of steel or concrete may be necessary.

6. The Turtle Facing Critical Endangerment and How You Can Help

   www.aol.com/turtle-facing-critical-endangerment...

   As the name suggests, the Chinese striped-necked turtle, or Maureyms sinensis, is found in China as well as Taiwan, Vietnam, and Laos.It lives in swamps, ponds, freshwater marshes, and soft-bottom ...

7. Salvage diving - Wikipedia

   en.wikipedia.org/wiki/Salvage_diving

   US Navy diver dredging an excavation site during an underwater recovery operation, searching for personnel who went missing during WWII off the coast of Koror. Salvage diving is the diving work associated with the recovery of all or part of ships, their cargoes, aircraft, and other vehicles and structures which have sunk or fallen into water.