Sea pressure. Part of the noisiness of cavitation is the collapse of the bubbles generated by sea pressure. It's the collapse of those bubbles that causes the damage to the screw. In a boiling pot of water the bubbles reach the surface where they burst into the air.
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USS Kentucky SSBN 737 (G)
Comms Div 2003-2006
Qualified 19 November 03
Yes I was really on a submarine.
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