I did forget to mention it was NOT in rough seas. Seas were very very calm. Sorry, meant to mention that last night cuz that would've been my first thought as well.
I'll have to play again tonight and see if the screws are out of the water, but I'm pretty sure this is a bug, maybe something wrong with the draft input as per Capn scurvy. None of the torpedoes came back as duds. Every single torpedo went under the ship, 6 of em. I went back and replayed the saved game file (granted with the same 6 torpedoes) and all 6 went under the ship again. Maybe next time i'll turn around and try my aft torps just to be sure, but i'm bettin they go under as well.
I guess you can say this was possible in real life. But I'm guessing this should not be possible in the game (not 6 of em running at min depth in calm seas anyway) unless there is a bug/bad data.
Also, i'm not using any other mods. Using tmo 2.0 with RSRD.
I will admit, i do have old saved games i could delete.
CapnScruvy, where can i find this editor to open the .sim file? i'm just surprised noone else noticed this. maybe noone ran into the dreaded hovering zinbu maru