Sinking of the RMS Titanic time of her entry into service on 2 April 1912, Royal Mail Ship (RMS) "Titanic" was the second of three sister ships, and was the largest ship in the world. She and her sister, , were almost one and a half times the gross register tonnage of Cunard's and , the previous record holders, and were nearly longer. "Titanic" could carry 3,547 people in speed and comfort, and was built on a hitherto unprecedented scale. Her reciprocating engines were the largest that had ever been built, standing high and with cylinders in diameter requiring the burning of of coal per
Wreck of the RMS Titanic but have been consumed by other organisms. "Titanic" sank in 1912, when she collided with an iceberg during her maiden voyage. Numerous expeditions tried using sonar to map the sea bed in the hope of finding it, but were unsuccessful. In 1985, the wreck was finally located by a joint French–American expedition led by Jean-Louis Michel of IFREMER and Robert Ballard of the Woods Hole Oceanographic Institution. The wreck has been the focus of intense interest and has been visited by numerous expeditions. Controversial salvage operations have recovered thousands of items, which have been conserved and put on public display.