In November 1925 Britain's biggest and most advanced submarine sank without trace, taking 69 men to their deaths. The Admiralty claimed it was a collision, others weren't so sure. An ex-Navy diver sets out to solve the mystery.
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In November 1925 Britain's biggest and most advanced submarine sank without trace, taking 69 men to their deaths. The Admiralty claimed it was a collision, others weren't so sure. An ex-Navy diver sets out to solve the mystery.
(R) (S) (W)
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