I wouldn't be surprised if there is a variant that quietly launches under propeller power and switches over to supercavitating rocket power when it is "near" the target.==
Me second.
Squall was designed in Bauman technical university in Moscow. I know that univercity personally. Thier folk is very very smart. Much smarter then me:). But I aint dumb either:).
Russia do good weaponry during all her history. Because her existance depended on it many times.
I won't be surprised if Squall has some kind of underwater laser homing device:). I heard something about it long ago.
Anyways russian Souz flies those day but american shuttles are not.