Ascension Island a staging point by the British military during the Falklands War. Ascension Island hosts one of four ground antennas (others are on Kwajalein Island, Diego Garcia, and Cape Canaveral) that assist in the operation of the Global Positioning System (GPS) navigational system. NASA operates a Meter Class Autonomous Telescope (MCAT) on Ascension Island for tracking orbital debris, which is potentially hazardous to operating spacecraft and astronauts, at a facility called the John Africano NASA/AFRL Orbital Debris Observatory. In 1501, the Portuguese navigator Afonso de Albuquerque sighted the island on Ascension Day (which fell on 21 May that year) and named
Afonso de Albuquerque to Persia. Miguel Ferreira was sent via Ormuz to Tabriz, where he had several interviews with the shah about common goals on defeating the Mamluk sultan. At the same time, Albuquerque decided to conclude the effective conquest of Hormuz. He had learned that after the Portuguese retreat in 1507, a young king was reigning under the influence of a powerful Persian vizier, Reis Hamed, whom the king greatly feared. At Ormuz in March 1515, Afonso met the king and asked the vizier to be present. He then had him immediately stabbed and killed by his entourage, thus "freeing" the dominated