Here is an idea for a future release of Sub Commander:
I plan on playing a campaign from the 9/39 until the very end of the war (I'm only at 5/1940 now). But I’m using the Sub Commander features 1) realistic careers and 2) Career starting date. So when one captain dies/retires I move on to the next captain until the war ends.
So instead of transferring crew in IF your old captain retires you have your new captain transfer in and take over the U-Boat and crew? I’m sure it happened in RL.
PS: Lost another crewmen to being drunk and disorderly... Sure I told them to celebrate after we got that anchored taskforce but come on!?!?!?