Olympic-class ocean liner
When "Titanic" sank in 1912 and "Britannic" sank in 1916, their sinkings did not receive the same attention, due to the death toll (1,517 on "Titanic" and 30 on "Britannic"). Because the exact position of the sinking of the "Britannic" is known and the location is shallow, the wreck was discovered relatively easily in 1975. "Titanic", however, drew everyone's attention in 1912. After several attempts, the wreck was finally located by Jean-Louis Michel of Ifremer and Robert Ballard following a top secret mission for the US Navy to investigate the wreckage of two nuclear submarines, USS Thresher (SSN-593) and the USS Scorpion (SSN-589), that sank in the North Atlantic in the 1960s. The discovery of the wreck occurred on 1 September 1985, at 25 kilometres from the position given of the sinking. The wreck lies about 4,000 metres deep, broken in two. The bow is relatively well preserved, but the stern partially imploded, and to a large extent disintegrated during the descent and impact on the seabed.
Sinking of the RMS Titanic
"Titanic" was subjected to extreme opposing forces – the flooded bow pulling her down while the air in the stern kept her to the surface – which were concentrated at one of the weakest points in the structure, the area of the engine room hatch. Shortly after the lights went out, the ship split apart. The submerged bow may have remained attached to the stern by the keel for a short time, pulling the stern to a high angle before separating and leaving the stern to float for a few minutes longer. The forward part of the stern would have flooded very rapidly, causing it to tilt and then settle briefly until sinking. The ship disappeared from view at 02:20, 2 hours and 40 minutes after striking the iceberg. Thayer reported that it rotated on the surface, "gradually [turning] her deck away from us, as though to hide from our sight the awful spectacle ... Then, with the deadened noise of the bursting of her last few gallant bulkheads, she slid quietly away from us into the sea."