The radio massages are just for immersion.Torpedoes run at desired depth.However you said that you havent observed any hits, so there is a chance of premature detonation, it is frequent in torps with magnetic pistols in early war.
Also there is the possibility the torpedoes werent enough.I had cases of 4-5k ships surviving 2 torps in diffrent areas and continue going (slower but still).Unless you aim very precise at weak points there is always the chance the ships wont sink.
__________________
By the hour !
|