I hadn't heard of this fact before:
1911: While beginning her fifth Atlantic crossing under the command of Captain E.J. Smith, the ocean liner Olympic collides with the HMS Hawke, punching a triangular hole eight feet by fifteen feet in Olympic’s side. Two of the massive liner’s compartments are flooded, but thanks to her watertight doors, she remains afloat. A subsequent inquiry concludes that Smith—who goes on to captain Titanic on its maiden voyage—is guilty of recklessness.