No time compression I believe, but you won't need it. You start realtively close but outside visual range of a convoy and with everyone doing their work, we blew 5 hours on one patrol by very very quickly... 3 engagements, 2 depth charge attacks, 14000 tons at the bottom
I understand you may not have 5 hours, but in an hour or so you can get one solid engagement in if that's all you got. Remember we're subsimmers here... aren't we supposed to stare at maps and gauges for hours on end while drooling...?