Is it true by 1986 the mps program had in place 13 ships one squadron eastern Atlantic a second at Diego garcia Indian ocean and third Guam western pacific?

The information you are asking about is inaccurate. By 1986, the United States Navy had deployed a total of 12 Maritime Prepositioning Ships (MPS) to three strategic locations: the Indian Ocean, the Western Pacific, and the Eastern Atlantic. These ships were assigned to three squadrons, each consisting of four MPS. The squadrons were based in Diego Garcia, Guam, and Rota, Spain.