The escorts will use the tracks of your torps to estimate your position when you fired them and attack that area fairly immediately. I'm guessing that's what you saw.
I've noticed the depth changing abilities of the subs seem to be grossly inflated. Would take well over half an hour for a US sub to get back to periscope depth from around 300' under usual circumstances (pretty sure that's what Dick O'Kane says in Wahoo).
As for being able to control your depth like that while stationary, that's just nonsense.
|