Steve wrote:
It's not on a chart that I can see. I don't think it's a ship.
There's no wake and no detail like a ship would have. An oil spill?
It could be just a smudge on the picture. There's a few more blobs
like it just to the south.

http://maps.google.com/maps?ll=38.98...07832&z=17&t=k

Steve

A. I have been over this bridge many times and there is nothing there.
B. I am nearly positive it is an artifact from scanning.