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This class of equipment is now commonly referred to as a twin-hose diving regulator, [2] or demand valve. The Aqua-Lung was invented in France during the winter of 1942–1943 by two Frenchmen: engineer Émile Gagnan and Jacques Cousteau, who was a Naval Lieutenant (French: lieutenant de vaisseau). It allowed Cousteau and Gagnan to film and ...
Only about 12,000 were made. [108] After World War II Lambertsen called his 1940-1944 rebreather LARU (for Lambertsen Amphibious Respiratory Unit) but as of 1952 Lambertsen renamed his invention and coined the acronym SCUBA (for "self-contained underwater breathing apparatus"). During the following years this acronym was used, more and more, to ...
A scuba set is characterized by full independence from the surface during use, by providing breathing gas carried by the diver. Early attempts to reach this autonomy were made in the 18th century by the Englishman John Lethbridge, who invented and successfully built his own underwater diving machine in 1715, but though the air supply was carried in the diving apparatus, it relied on surface ...
The years of World War II were decisive for the history of diving. After the armistice of 1940 , the family of Simone and Jacques-Yves Cousteau took refuge in Megève , where he became a friend of the Ichac family who also lived there.
However, these suits were used by the Germans as armored divers during World War II and were later taken by the Western Allies after the war. In 1952, Alfred A. Mikalow constructed an ADS employing ball and socket joints, specifically for the purpose of locating and salvaging sunken treasure.
In 1933 Italian companies were already producing underwater oxygen rebreathers, but the first diving set known as SCUBA was invented in 1939 [22] by Christian Lambertsen, who originally called it the Lambertsen Amphibious Respirator Unit (LARU) [23] and patented it in 1940. [24]
The M4 Medium became the second-most-produced tank of World War II, and was the only tank to be used by virtually all Allied forces (thanks to the American lend-lease program); approximately 40,000 M4 Mediums were produced during the war. [30] M4s formed the main tank of American, British, Canadian, French, Polish, and Chinese units.
Recreational scuba diver The undersea kelp forest of Ana Capa off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1]