<P> Over the years after her sinking, many impractical, expensive and often physically impossible schemes have been put forward to raise Titanic from her resting place . They have included ideas such as filling the wreck with ping - pong balls, injecting it with 180,000 tons of Vaseline, or using half a million tons of liquid nitrogen to encase it inside a giant iceberg that would float back to the surface . However, the wreck is far too fragile to be raised and is now protected by a UNESCO convention . </P> <P> Almost immediately after Titanic sank on 15 April 1912, proposals were advanced to salvage her from her resting place in the North Atlantic Ocean, despite her exact location and condition being unknown . The families of several wealthy victims of the disaster--the Guggenheims, Astors, and Wideners--formed a consortium and contracted the Merritt and Chapman Derrick and Wrecking Company to raise Titanic . The project was soon abandoned as impractical as the divers could not even reach a significant fraction of the necessary depth, where the pressure is over 6,000 pounds per square inch (410 bar). The lack of submarine technology at the time as well as the outbreak of World War I also put off such a project . The company considered dropping dynamite on the wreck to dislodge bodies which would float to the surface, but finally gave up after oceanographers suggested that the extreme pressure would have compressed the bodies into gelatinous lumps . (In fact, this was incorrect . Whale falls, a phenomenon not discovered until 1987--coincidentally, by the same submersible used for the first manned expedition to Titanic the year before--demonstrate that water - filled corpses, in this case cetaceans, can sink to the bottom essentially intact . The high pressure and cold temperature of the water would have prevented significant quantities of gas forming during decomposition, preventing the bodies of Titanic victims from rising back to the surface .) </P> <P> In later years, numerous proposals were put forward to salvage Titanic . However, all fell afoul of practical and technological difficulties, a lack of funding and, in many cases, a lack of understanding of the physical conditions at the wreck site . Charles Smith, an architect from Denver, proposed in March 1914 to attach electromagnets to a submarine which would be irresistibly drawn to the wreck's steel hull . Having found its exact position, more electromagnets would be sent down from a fleet of barges which would winch Titanic to the surface . An estimated cost of $1.5 million (£ 35,451,827 today) and its impracticality meant that the idea was not put into practice . Another proposal involved raising Titanic by means of attaching balloons to her hull using electromagnets . Once enough balloons had been attached, the ship would float gently to the surface . Again, the idea got no further than the drawing board . </P> <P> In the mid-1960s, a hosiery worker from Baldock named Douglas Woolley devised a plan to find Titanic using a bathyscaphe (like Trieste, used to reach the bottom of the Mariana Trench in 1960) and raise the wreck by inflating nylon balloons that would be attached to her hull . The declared objective was to "bring the wreck into Liverpool and convert it to a floating museum ." The Titanic Salvage Company was established to manage the scheme and a group of businessmen from West Berlin set up an entity called Titanic - Tresor to support it financially . It fell apart when its proponents found they could not overcome the problem of how the balloons would be inflated in the first place . Calculations showed that it could take ten years to generate enough gas to overcome the water pressure . </P>

What would it take to raise the titanic
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