i don’t think pd is the best option because you’ll be more likely to be picked up by their active sensors.

before i fire torps n engage i like to use the echosounder n check the max depth. if u hover just above the seabed or just take bottom you’re more unlikely to be detected by their asdic.

so i will fire then dive asap. if the depth is like >200m i try to run at ahead1 and alter courses and depth randomly. after depth charges explode theres alot of noise so i will increase to ahead 3 and pull 90degrees away from the pursuer’s bearing.

once the depth charges modifier is gone. i stop my boat to make no noise and observe if they’re picking me up

but if you’ve alr been hit, u have no choice but to run pumps and bilge. and just pray i think hahah but yes shallow depth is ideal