Sub Commander 2.6
 

I cant answer the first part of your question as i dont use sh3 commander myself.

The second part i can, the 24 hour fatigue mod meens that you will have to manualy rotate your crew (meening switch them around so the ones in bunks are at the stations and the ones at the stations are in bunks) as it takes them 24 hours to get tired out (also with grey wolves if installed right, crew loose fatigue reguardless of the time compression setting). Of course in stormy weather certain stations are affected more (mainly torpedo rooms, conning station, and diesel engine compartment)

Commander 2.6 has the no fatigue option.

zz

sub commander 2.6
 

Thank you