[Bellman]

The 90 deg + breakage (possibility ?) would lead to some tight calls between cut 'em loose and 'scoot and run'
or finesse a turn and 'stay in touch'. Decisions which could increase reality and gameplay.

Could the angle calculation be referenced the bearing from sub to torps actual position, rather than launch bearing ?
Obvious in reality (but in game ?) The tactical possibilities then are extended - egs the offset launch which is resteered.

Edit. Posts crossed LW - I think you answered my last para !