www.uboataces.com/ref-crew.shtm
i got my info here , appearently it varied greatly as far as crew setup , but i go with 3 seaman to 2 petty officers and 4 officers. the 5th officer i find usless and just makes it harder to change shifts
1wo- helmsmen watchmen and whatever he was 2nd in command so this fits him well imo
2wo watchmen flak gunner in charge of deck crew
cheif engineer- obvious machinist repair maybe torpedomen this guy usually stays below deck
for the 4rth officer its up to you for me i like to make him a "disciplinary officer" and assign him taskmaster specialties torpedomen machinist medic he basiclly makes sure nobody is slacking
as far as petty officers go
1 helmsmen- this is for the cheif petty officer slot for navigator 2 is better for shift changeing.
2 machinist diesel and electir officers
3 torpedomen only because its what i start with
1 flak gunner
1 gunner
2 watchmen
the rest i typically make a medic/repair or whatever i need depending on the boat. typVII boats i usually go wit max petty officer and 24-26 seamen. makes crew juggleing easier as youll only have 1 or 2 crewmen sleeping with the engines while surfaced and 4-5 while submerged. and well you can read the rest on the link above.
i play 1x so i fill in for officers sometimes so you may want the 5th officer idk well andway blah blah im looking for good info on uboat crew setup so if anyone has anything else post a link please =)