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The submarine had broken into three pieces, tragically confirming that all 53 crew members had perished.
The exact cause of the sinking remains unknown. Indonesian officials have ruled out human error and have suggested a power failure or undersea wave may have forced the submarine to descend far below its crush depth of about 655 feet. The government plans to recover the submarine with help from China.
Deep-water submarine sinkings are rare but always fatal, and their causes are hardly ever fully established.
In 1968, for instance, four submarines from four countries were lost with all hands in a five-month period. Over 50 years later, their causes remain unknown.
April 23, 2021
April 22 (Reuters) – The Indonesian Navy is searching for its submarine KRI Nanggala-402 after it lost contact with the vessel in waters off Bali on Wednesday. Here are some other notable submarine accidents:
Losharik fire
In July 2019, a fire onboard the nuclear-powered Russian deepwater research submarine Losharik killed 14 crewmembers. Five of those onboard survived, according to reports, and the submarine was recovered and repaired.
ARA San Juan lost
The Argentinian diesel-electric submarine disappeared while on patrol in November 2017. After weeks of search and rescue efforts, it was declared lost along with all 44 people aboard. Its wreckage was discovered the next year in about 900 meters of water.
FACTBOX-Major submarine disasters reuters.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from reuters.com Daily Mail and Mail on Sunday newspapers.