I think i might turn this:
http://www.uboat.net/boats/u537.htm
Into a single mission. Kinda like my bungo pete single mission.
Just as an aside, ill need to lower the max height of the hydrophones more. Deep enough so that radar depth can be used, not to so deep that your deaf at periscope depth. Reason is, i forgot that the game only uses one sensor at a time (but can change between types very rapidly) Or so is my understanding. With hydrophones near the surface, this could be causing all sorts of buggery with visual and radar.