I was just patrolling the Gibraltar area when my watch officer reported a ship sighted. I looked that way and I spotted several ships of what looked to see destroyer size and two battleships and an aircraft carrier. I was already in perfect position to move in and attack. I dove to periscope depth and managed to close to 2500 meters undetected. I targeted the carrier, took the readings, and fired two T2 torpedos at it. About halfway there one of them detonated prematurely

but the other one managed to hit the carrier and leave it dead in the water

I'm now preparing to fire two T1 torpedoes at it. Any last minute advice on "escape and evasion"?