Portal:Underwater diving

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Underwater diving

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Helmet logo for Underwater Diving portal.png
Underwater diving is the practice of going underwater, either with breathing apparatus (scuba diving and surface supplied diving) or by breath-holding.

Recreational diving is a popular activity (also called sports diving or subaquatics), and includes technical diving, recreational scuba diving, freediving, snuba, snorkeling and a range of competitive sports performed underwater.

Professional diving includes diving as part of one's occupation, and takes a range of diving activities to the underwater work site. Commercial diving, military diving, public safety diving and scientific diving are aspects of professional diving.

Freediving is a form of underwater diving that does not involve the use external breathing devices, but relies on a diver's ability to hold his or her breath until resurfacing. Activities include breath-hold spear fishing, freedive photography, apnea competitions, and to some degree, snorkeling.

The scope of this portal includes the technology supporting diving activities, the physiological and medical aspects of diving, the procedures of diving, underwater activities which are to some degree dependent on diving, economical and commercial aspects of diving, biographical information on notable divers, inventors and manufacturers of diving related equipment and researchers into aspects of diving,

Selected article

A decompression dive profile in yellow showing a no-stop dive profile in red

A dive profile is a description of a diver's pressure exposure. It may be as simple as just a depth and time pair, as in: "sixty for twenty," (a stay of 20 minutes at a depth of 60 feet) or as complex as a second by second graphical representation of depth and time.

It is useful as an indication of the risks of decompression sickness and oxygen toxicity and also the volume of open-circuit breathing gas needed for a planned dive as these depend in part upon the depth and duration of the dive. A dive profile diagram is often drawn with time running from left to right and depth increasing down the page.

Selected biography

Charles Momsen.jpg

Charles Bowers Momsen (June 21, 1896 – May 25, 1967), nicknamed "Swede", was born in Flushing, New York. He was an American pioneer in submarine rescue for the United States Navy, and he invented the underwater escape device later called the "Momsen lung", for which he received the Navy Distinguished Service Medal in 1929. In May 1939, Momsen directed the rescue of the crew of Squalus (SS-192).

Selected picture

US Navy 110520-N-VF350-023 Navy Diver 2nd Class Joshua Westman sucks sand off the bottom of the ocean during a Joint POW-MIA Accounting Command (JP.jpg

Thua Thien Hue, Vietnam (May 20, 2011) Navy Diver assigned to Mobile Diving and Salvage Unit (MDSU) 1, sucks sand off the bottom of the ocean during a Joint POW/MIA Accounting Command (JPAC) underwater recovery mission.

Categories

Underwater diving(32 C, 30 P)
Underwater divers(9 C, 21 P)
Underwater archaeology(4 C, 24 P)
Armed forces diving(1 C, 53 P)
Diving engineering(35 P)
Diving organizations(3 C, 47 P)
Underwater diving environment(1 C, 3 P)
Diving equipment(17 C, 22 P, 2 F)
Underwater fiction(5 C, 2 P)
Free-diving(1 C, 31 P)
Underwater diving history(1 C, 7 P)
Manned submersibles(7 P)
Marine biology(7 C, 128 P, 1 F)
Marine salvage(1 C, 14 P)
Diving medicine(1 C, 58 P)
Underwater diving physiology(1 C, 10 P)
Underwater diving procedures(7 C, 35 P)
Professional diving(1 C, 4 P)
Recreational diving(2 C, 12 P)
Underwater diving safety(3 C, 31 P)
Scientific diving(2 C, 3 P)
Underwater security(1 C, 4 P)
Shipwreck law(1 C, 11 P)
Underwater diving sites(7 C, 16 P)
Sponge diving(1 C, 13 P)
Underwater diver training(1 C, 3 P)
Underwater diving stubs(140 P)

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