Even if so, that's just the temperature problem. There's also the possible problems of: * needing to swim for a long time, regardless of the water's temperatu

Even if so, that's just the temperature problem. There's also the possible problems of: * needing to swim for a long time, regardless of the water's temperature (this is what I had in mind with my comment you replied to) * pushing your way past obstacles in a damaged ship * physically surviving damage from falling debris, burns, cuts, blood loss I'm sure others can think of more issues.