Just a guess, it is intentional and meant to give the player the feeling that they discovered the mysterious ship out in the ocean, disserted and the first thing they do is go to the door of the ship. If they put the badge at the very front, maybe Jack and Rose a la Titanic-style, it may have also been found, but I think its placement was appropriate given the ships odd location. There are other examples of badges in different zones awarding, even though you are not physically seeing them. I think Boomtown has one?