On Sat, 29 Jan 2005 00:16:14 -0500, wrote:

Whoever wrote what you replied to is an idiot. Diesel subs are noisy only while
surfaced to recharge batteries but once submerged are extremely difficult to
detect.

I seem to recall that they are rather loud when snorting, too.

"surfaced to recharge" and "snorting" are pretty much the same thing
in terms of noise - the diesel is running. Once you turn off the
diesel, they can be very, very quiet indeed.

--
Andrew Toppan --- --- "I speak only for myself"
"Haze Gray & Underway" - Naval History, DANFS, World Navies Today,
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