Maurice Chatelain has worked as an engineer for a NASA sub-contractor, who apparently left before the Apollo 11 landing on the Moon. He is the author of Our Cosmic Ancestors, in which he made unsubstantiated claims about alien vehicles on our satellite(a). His UFO claims were debunked by Jim Oberg, who did work directly for NASA(b).
Chatelain also claimed that within a 450-mile radius of the Aegean island of Delos that there were 13 mystical sites, when connected by straight lines formed a perfect Maltese Cross(c)!
His book also contains a chapter on Atlantis, which offers a brief overview of the subject before opting for the Bahamas as the location of Plato’s ‘island’.
(b) http://www.jamesoberg.com/94-foxTV-astro-UFO.PDF (Offline Sept. 2017) See Archive 3392