Wreck of the RMS Titanic the debris field was surveyed in Robert Ballard's 1986 expedition, pairs of shoes were observed lying next to each other on the sea bed. The flesh, bones, and clothes had long since been consumed but the tannin in the shoes' leather had apparently resisted the bacteria, leaving the shoes as the only markers of where a body had once lain. Ballard has suggested that skeletons may remain deep within "Titanic"s hull, such as in the engine rooms or third-class cabins. This has been disputed by scientists, who have estimated that the bodies would have completely disappeared by the early 1940s
Sinking of the RMS Titanic believed that ice posed little risk; close calls were not uncommon, and even head-on collisions had not been disastrous. In 1907, , a German liner, had rammed an iceberg and suffered a crushed bow, but was still able to complete her voyage. That same year, "Titanic"s future captain, Edward Smith, declared in an interview that he could not "imagine any condition which would cause a ship to founder. Modern shipbuilding has gone beyond that." As "Titanic" approached her fatal collision, most passengers had gone to bed and command of the bridge had passed from Second Officer Charles Lightoller to First