a tad of background here: I am a BB,CV and SS user (all KM). On my cv I use only AA atm so I am vulnerable to this sort of attack
However, this is the most stupid request. the SS hump is one of the hardest to use tactics in the game for an SS. It requires to get through the BB lines, undetected usually, which is hard given the amount of PHH in the game. It then requires you to find a stationary unarmed cv (its a lot harder if it is moving), and resist the ss instinct to fire torps. then surface underneath it, and flakk it. the simple counter to this is for the cv to accelerate towards their BBs, forcing the SS to dive. I admit to being a heavy practicioner of this tactic, the other major reason is that shell damage is the way to Xp for a SS driver, torps only go to shared xp, not personal xp.