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Originally Posted by lesrae
If I remember correctly there's an emergency/maintenance inflatable seal that can be used (I haven't seen it but imagine it's like a toroidal airbag) but the shaft can't/shouldn't turn while it's in use.
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Righto! USS Tullibee had to use the emergency seal when their screw fell off in the Med.
June 16, 1978: "The propeller shaft of the TULLIBEE snaps just outside the hull causing limited engine room flooding and loss of propulsion while TULLIBEE is submerged in the Mediterranean. The flooding is stopped by tightening the emergency packing on the propeller shaft. The submarine quickly surfaces and is assisted by other US naval ships. The TULLIBEE is subsequently towed to Rota, Spain, for repairs."
http://navysite.de/ssn/ssn597.htm