Eventually (hundreds of millions of years from now), the oceans will boil off and then the Titanic will be beached for easy access.When I was in elementary school one of my classmates did a science project on how many ping pong balls would it take to raise the Titanic. He came in with a 20 gallon aquarium and a mental model of a ship with a hole in the side and bags of ping pong balls and talked about the conversion of his test ship and the real thing with all the different notes about water pressure, size, massing, and such. Even then (like more than 35 years ago) he pointed out that this would never work in the real world because the deck and the floors of the ship were constructed for downward force and not lift. Additionally, the ship is in two pieces and too many of the ping pong balls would come out.
His dad was a structural engineer.
Jim