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The Nerpa had 208 people aboard when the accident occurred, including 81 seamen, according to the navy. Akula-class subs normally carry a crew of 73.
Individual breathing kits should have saved the crew, but some former submariners said civilian shipyard workers usually have little experience in using them. Seventeen of those killed in the accident were civilians, the Russian navy said.
Some commentators also speculated there might not have been enough individual breathing kits for all those aboard during the test.
An unfortunate accident. Still the Akula class is one of the best subs in the world but it's heyday would have been at the fall of the wall.
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