who discovered the titanic wreck site and when
Wreck of the RMS Titanic Ballard realized that looking for the wreck itself using sonar was unlikely to be successful and adopted a different tactic, drawing on the experience of the surveys of Thresher and Scorpion; he would look for the debris field instead,[33] using Argo's cameras rather than sonar. Whereas sonar could not distinguish man-made debris on the sea bed from natural objects, cameras could. The debris field would also be a far bigger target, stretching a mile (1.6 km) or longer, whereas Titanic itself was only 90 feet (27 m) wide.[34] The search required round-the-clock towing of Argo back and forth above the sea bed, with shifts of watchers aboard the research vessel Knorr looking at the camera pictures for any sign of debris.[35] After a week of fruitless searching, at 12.48 am on Sunday 1 September 1985 pieces of debris began to appear on Knorr's screens. One of them was identified as a boiler, identical to those shown in pictures from 1911.[36] The following day, the main part of the wreck was found and Argo sent back the first pictures of Titanic since her sinking 73 years before.[37] The discovery made headlines around the world.[38]
Wreck of the RMS Titanic Tourist and scientific visits to Titanic are still continuing; by April 2012, 100 years since the disaster and nearly 25 since the discovery of the wreck, around 140 people had visited.[61] On 14 April 2012 (the 100th anniversary of the ship's sinking), the wreck of the Titanic became eligible for protection under the 2001 UNESCO Convention on the Protection of Underwater Cultural Heritage.[62] In the same month, Robert Ballard, the wreck's discoverer, announced a plan to preserve the wreck of the Titanic by using deep-sea robots to paint the wreck with anti-fouling paint, to help keep the wreck in its current state for all time. The proposed plan that Ballard announced has been outlined in a documentary made to time with the Titanic's 100th sinking anniversary called Save the Titanic With Bob Ballard where Ballard himself talks about how this proposed paint job on the wreck will work. Ballard says that he proposed to robotically clean and repaint the Titanic with a colour scheme mimicking rusticles because he saw "original anti-fouling paint on the ship's hull, which was still working even after 74 years on the seabed" when he visited the Titanic in 1986.[63]
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