Hi,
About the meanings of the wreckage sonar picture : "
The most notable discovery the team made was that the ship had split apart, the stern section lying 1,970 feet (600 m) from the bow section and facing opposite directions." (
RMS Titanic - Wikipedia, the free encyclopedia). Titanic. A ship, standing (not enough...) at the surface. No speed. No big "splash". Sea like a mirror, as it is known. About the same depth. So ...