2 Dize.
It's very good! Good luck! But i don't understand, if u playing on high realism set, why u want cheat?... About long range, i think, u must wait convoy at calculated point & with min noise to have good closed salve position. U must to have good sonarman, target speed, AOB & calculated table + good eye & luck. It's my tactics, but u ....
Yours truly,
Anvart