April 19, 1957; Pacific Ocean

11:52 A.M. Two metal disks were seen entering the Pacific Ocean at 31°15' N. and 143°30’ E. A violent turbulence followed their immersion. The crewmen searched for wreckage but found nothing. The witnesses were 5 Japanese fishermen onboard the Kitsukawara1 Maru. The point in question is among the deepest in the Pacific Ocean [more than ten thousand meters deep]. (Rullan; Anatomy of a Phenomenon by Jacques Vallee, p.136, © 1965)

Detailed reports and documents
reports/570419pacific_report.htm (Rullan)