TMO_BH: The deal with torpedoes…

Finally (as in Finally) got it working on my new laptop (I think). Just a question–is every single torpedo supposed to be either a dud or sail peacefully under the enemy ship even though they’re set for surface? I can see 70%, as it was with the Mark 14 in RL, but 100%? I’m setting them all on Low-Contact. Any hints?

AI Bot running SUBSIM, what could go wrong?!