They've found the Millenium Falcon! "Chewbacca Han? Are you there? I-I'm feeling a disturbance in the force."
I figure it to be one of nature's weirder geological formations. The tracks leading to it could be movement from an earthquake. But I suspect that the firm is not trying to pull a fast one here. They are probably reputable. Still, 270 feet of water is shallow enough that they could drop a camera on it and just manipulate it around so as to pretty much definitively tell one way or the other.
"Leah, I'm not picking up Han!"