Let me try again. It depends on the engineering and instalation. The difference between the generator and sea level can make a difference. Are the fresh water inlet and exhaust set up to handle the pressure differences when the boat pounds on and off the waves? Does the speed of the hull create a vacuum starving the fresh water inlet? Does the sea action take the intake out of the water? At what point of heel does the generator have oil flow issues? If you want to run a generator safety underway the boat must be engineered for that. Some are some are not. Many boats may seem just fine until you cross one of more of the wave, speed, heel danger zones.