ahoi Shirkon ...welcome skipper
When i'm 120 ft deep and want to surface i only use diving planes and propellers (speed) to go up and when i'm almost at the surface and the air induction/snorkel mast is out the water ...then only i blow ballast if i understand well wat you are saying ?
If that is the case ...then there is something wrong in the game ....they blow mainballasttanks when i'm at 120 ft to surface ....:hmm: