On 7/30/2011 5:27 PM, Dave U. Random wrote:
http://www.space.com/12475-ufo-ocean-floor.html

Decide for yourself...

It looks a lot like a bulkhead out of a submarine; in fact, it looks
like a bulkhead out of a submarine designed by Simon Lake, which had a
rectangular ballast tank inside the bottom of the hull shaped like that,
so as not to infringe on John Holland's patents.

Pat