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 king, so the island in the Persian Gulf yielded to him without resistance and remained a vassal state of the Portuguese Empire. Ormuz itself would not be Persian territory for another century, until a British-Persian alliance finally expelled the Portuguese in 1622. At Ormuz, Afonso met with Miguel Ferreira, returning with rich presents and an ambassador, carrying a letter from the Persian potentate Shah Ismael, inviting Afonso to become a leading lord in Persia. There he remained, engaging in diplomatic efforts, receiving envoys and overseeing the construction of the new fortress, while becoming increasingly ill. His illness was reported as