I`am playing at 100% realism (all options on). Never mess around with destroyers and aircrafts unless i have no choise
When i live the base i never run my diesel engines at ahead flank only on slow speed, same when returned.
When in patrol in the good weather condition my constant speed between 8-9 knots, using ahead flank only when i try intercept a target.
When the weather is bad - slow speed - diving to 40 -50 meters constantly.
My gameplay is depends on the situations and Flotila