Couple questions about the R.M.S Titanic...?

Question

1) What would be the career to hop in those mobile tanks that go under water and look for stuff within the ship?

2) How long will it take for the Titanic to simply go to dust?

Answer 1

1) deep sea diving. You got to be real healthy to do this job. good money though, especially in the oil business

2) no one knows for sure but another 100-150 years should do the trick. A lot depends on local conditions- eg the turret from the USS Monitor was recovered in good condition and it's been in the sea since (SFAIK) 1868