6,000-pound Shkval rocket torpedo has a range of about 7,500 yards... The Chinese Type 093-class nuclear attack submarines are similar to Russian Victor III class first produced at the Leningrad yards in the 1970s... 5,000 tons and is over a football field in length....***Yawn***
Big deal. A fish with a range of 7,500 yards, installed on a boat that you can hear (and kill) from well over three times that range... Victor boats are about as stealthy as a cat-burgler who, while trying to break into your house, is carrying two tin 50-gallon garbage cans...
He'll be rather lacking, with regard to the element of surprise...
FReegards,
Don't forget these are also "dumb" straight line weapons. Which means you need to be close in and lucky.