On Mon, Feb 22, 2016 at 12:37 AM, <tmr0195@comcast.net> wrote:

Yep, being a sonar technician I'll confirm that cavitation is extremely loud and not an event a submarine wants to happen.

And - as Tom's earlier post said - the greater the pressure on the hull, the lower the chance that cavitation will occur. Thus, the deeper you can cruise, the faster you can [quietly] go.

Richard Aiken

"Never insult anyone by accident." Robert A. Heinlein

"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville (1843)

"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester

"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confederate tax collector facing the weapons held by Knight's young children and wife.