Bugfix for missing officer (who was left in damage control after a save and exit).
Find your latest save game crew config file and make a backup.
Open the original file with notepad and locate crew member slot number 11. Copy everything in that slot except for the first line [Crew_member_11].
Scroll back up to one of the other officer crew member slots that has an NrComp number of -1 and paste the information over what's there. Make sure you have the compartment you're choosing (ie, no stern torpedo room in an XX1).
Do NOT use crew_member slot number 1 as it is not used in the game, and don't use any slot that has a value besides -1 or you'll be missing another crewman when you restart the game.
Sufficiently intimidated?

well here is a list of officer slots by compartment and NrComp number.
Conning Tower Bridge
Nr Comp 0
Officers slot number = 0
Control room
Nr Comp 2
Officers slot numbers = 2 3 4
Bow Torpedo room
Nr Comp 5
Officers slot number = 7
Bow Quarters
Nr Comp 6
Officers slot number = 8
Stern Quarters
Nr Comp 7
Officers slot number = 9
Diesel Engine compartment
Nr Comp 3
Officers slot number = 5
Electric engine compartment
Nr Comp 4
Officers slot number = 6
Aft Torpedo room
Nr Comp 8
Officers slot number = 7
Damage Control
Nr Comp 11
Officers slot number = 11