scuttling, the sabotage of bottom valves by her crew, as  claimed by German survivors. A detailed look at computer analysis of  the hulls eventual impact on the sea bottom explains unintuitive  damage as a result of hydrodynamic impact shock inside the ship  which was still girded by an uninterrupted curtain of armor.  Extensive video footage of the wreck shows the hull is in excellent  condition and expected to last at least 300 years.