Use SH3 Commander and disable all fatigue.
SH3 does a terrible job of simulating any form of realistic "shift change" or "rotation" between crew members resting and working.
for me... i got so tired of micromanaging my crew that this was the only way to go.
in real life you have a rotation where one watch sleeps while the other goes on duty. SH4 does this job almost perfectly... SH3 does not. I would think that most u-boat crews could stand a month at sea without experiencing a great deal of fatigue to the point that the boat can no longer function.
SH3 commander's no fatigue option is one of the best options of the program.
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