Let the Truth be known, no ship is unsinkable. The bigger the ship, the easier it is to sink her. I learned long ago that if you design how a ship'll sink, you can keep her afloat. I proposed all the watertight compartments and the double hull to slow these ships from sinking. In that way, you get everyone off. There's time for help to arrive, and the ship's less likely to break apart and kill someone while she's going down.