I believe there is a theory that part of the problem was the way the steel was manufactured. It was supposedly too brittle and in cold temperatures was prone to cracking under stress. The main bulkheads also didn't go all the way to the top deck, allowing water to flow over the top into the next compartment which would flood and spill into the next, etc. None of this would have made a difference of course if the hull hadn't been impacted in the first place. History lesson complete for today. Tomorrows test will be on the League of Nations.
Steve