BOSTON— The desperate search for a submersible that disappeared and imploded while taking five people to view the Titanic wreckage has drawn attention to other deep-sea rescues. Those rescue efforts — from a ... CDNDigital
FILE – In this July 9, 1960, file photo, the U.S. Navy nuclear powered attack submarine USS Thresher is launched bow-first at the Portsmouth Navy Yard in Kittery, Maine. In 1963, the crew of a rescue ship listened helplessly after receiving an ominous message “exceeding test depth” before the USS Thresher disintegrated under the crushing pressure of the sea in 1963. Killed were 129 sailors and civilians on a routine test dive off Cape Cod.
In an incident that echoes the efforts to find and retrieve those trapped in the Titan submersible, Roger Chapman’s and Roger Mallinson’s lives hung on the success of the mission — which turned out to be the deepest known successful underwater rescue.Titan submersible: What is a ‘catastrophic implosion’?
Once the vehicle reached the sea floor, the two could do little more than check for leaks and do their best to conserve oxygen. Unlike Titan, they were able to maintain communication with those on the surface. Chapman and Mallinson had to wait a bit longer as workers struggled for 30 minutes to open the hatch and allow fresh air to rush in.
The AS-28 was sent to investigate an underwater surveillance antenna that had been entangled in nets. As it surveyed the area, the sub became stuck in about 620 feet of water. The submarine lost contact after being granted clearance to dive. The Defense Ministry said a helicopter later spotted an oil slick near the dive’s starting position.
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