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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 ...
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 ...
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 ...
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.
The Underwater Demolition Team (UDT), or frogmen, were amphibious units created by the United States Navy during World War II with specialized missions. They were predecessors of the Navy's current SEAL teams. Their primary WWII function began with reconnaissance and underwater demolition of natural or man-made obstacles obstructing amphibious ...
From June 6, 1944 through May 15, 1945 for US tank and tank destroyer losses in the European Theater of Operations, United States Army (Western Front): around 7,000 (including 4,295–4,399 M4 tanks, 178 M4 (105mm howitzer), 1,507 M3 Stuart tanks and 909–919 tank destroyers, of which 540 M10 tank destroyers, 217 M18 Hellcat and 152 M36 tank ...
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.
World War II deaths by country World War II deaths by theater. World War II was the deadliest military conflict in history.An estimated total of 70–85 million deaths were caused by the conflict, representing about 3% of the estimated global population of 2.3 billion in 1940. [1]