My Grandfather, late in life, said that when he was in the Navy in the late 1930s, that his ship was sent looking around the Pacific for her.
Wow!
My grandfather was a dentist in the US Navy. They sent him to Samoa for a year somewhere around 1936-37.
Well, it does look like a plane, and the other spot looks like Jimmy Hoffa and another spot there must be Al Capones safe!