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10 Rare-Known Disasters of the 20th Century

New Delhi: A disaster can be ostensively defined as any tragic event stemming from earthquakes, floods, catastrophic accidents, fires, or explosions. whether natural or manmade, they hit hard and leave scars on human and nature

PTI Published : Mar 02, 2013 23:13 IST, Updated : Mar 03, 2013 6:14 IST
3. The  Sinking of the USS Squalus in 1939



USS Squalus (SS-192), a diesel-electric submarine built at the Portsmouth Navy Yard, Portsmouth suffered a catastrophic valve failure during a test dive off the Isle of Shoals at 0740 on 23 May 1939.





Partially flooded, the submarine sank to the bottom and came to rest keel down in 40 fathoms (240 feet) of water.

Navy divers and salvage ships responded quickly, and the following day began operations to rescue the surviving 32 crew members and one civilian from the forward sections of the boat.

At 1130 on 24 May, USS Falcon (ASR-2) lowered the newly developed McCann rescue chamber—a revised version of a diving bell invented by Commander Charles B. Momsen—and, over the next 13 hours, all 33 survivors were rescued from the stricken submarine.

On 13 September, after long and difficult salvage operations, Squalus was raised and towed into the Portsmouth Navy Yard.

The boat was formally decommissioned on 15 November, renamed Sailfish on 9 February 1940, and recommissioned on 15 May 1940.
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