"agh" wrote in message ...
"Keith Willshaw" wrote in message
...
And makes so much noise that every SOSUS station on the
planet hears them

Is submarine's stealth cruising the only situation the submarine can be
caught in? Let's say it's already located and has a torpedo coming at it.
Or
some situation develops where it has to travel very fast to some place,
e.g.
some rescue operation or something, it doesn't really matter. In those
situations I wouldn't give a **** about some SOSUS tracking my ass but
would
be very thankful to the engineers that provided me with this neat feature.



The question is how much are you prepared to give up
to get it ?

Supercavitation requires a large gas generating capacity
and humongous amount of thrust. To achieve this the
Shkval has a honking great solid fuel rocket that takes
up most of its interior space and has a range of less than
6 miles.

Push your submarine 5 miles downrange this way and you'll
delay the helicopter by perhaps 3 minutes while providing him
with a confirmation of your presence and a precise location

Personally I'd prefer a decent decoy.

Keith