multiple salvage ship conducted a deep sea submarine rescue exercise Jan 3, 2013.
deep diving capsule are used to save life under water
More device are rolling off production line since recent years, Shark Dragon dived to 7100 m under water in 2012, making China the third country which can make this kind of deep sea divers
The deep diver sent back a clear sonar image of the "shipwrecked" sub.
deep diver returned to mother ship after mission accomplished.
Second mission is nocturnal
routine checking on precise instruments.