What about Indian arrowheads, are they restricted too?
Ok, here I go, sticking my nose in adult affairs again.
Titanic is a national monument in itself. Taking something from Titanic would be equivalent to stealing from, say, the Washington Monument, or the Vietnam Memorial. I'm no treasure hunter, but that's what this sounds like to be: thievery. Titanic was one of the greatest tragedies ever to occur, and no one should ever take anything from it.
I'd just like to add, that picture of the skeletons on the Titanic's bow is somewhat disturbing, to say the least. Unfortuanetly, site rules do not allow me to go any further, otherwise I would give you my opinion, which probably isn't worth much, of what this entire conversation sounds like.
~Kalking Nokali