power-off indicator
81Ice protection system — Ice protection systems are designed to keep atmospheric ice from accumulating on aircraft flight surfaces while in flight. The effects of ice accretion on an aircraft can cause the shape of airfoils and flight control surfaces to change, which… …
82List of Mayday episodes — Mayday, also known as Air Crash Investigation(s) in the United Kingdom, Australia and Asia and Air Emergency and Air Disasters in the United States, is a Canadian documentary television program produced by Cineflix investigating air crashes, near …
83Radar MASINT — is one of the subdisciplines of Measurement and Signature Intelligence (MASINT) and refers to intelligence gathering activities that bring together disparate elements that do not fit within the definitions of Signals Intelligence (SIGINT),… …
84Apollo Guidance Computer — and DSKY Invented by MIT Instrumentation Laboratory Manufacturer Raytheon Introduced August 1966 …
85VHF omnidirectional range — This article is about the radio navigation aid. For other uses, see Vor. D VOR (Doppler VOR) ground station, co located with DME …
86Phoenix (spacecraft) — This article is about the Mars lander. For the Star Trek spacecraft, see Phoenix (Star Trek). For other uses, see Phoenix (disambiguation). Phoenix Mars Mission Artist s impression of the Phoenix spacecraft as it lands on Mars Operator NASA …
87Optical landing system — The Fresnel Lens Optical Landing System of Charles de Gaulle An optical landing system (OLS) (nicknamed meatball or simply, Ball ) is used to give glidepath information to pilots in the terminal phase of landing on an aircraft carrier.[1] From… …
88Afghanistan — Islamic Republic of Afghanistan جمهوری اسلامی افغانستان Jomhūrī ye Eslāmī ye Afġānistān (Persian) د افغانستان اسلامي جمهوریت Da Afġānistān Islāmī Jomhoriyat …
89Electric Line — The term wireline usually refers to a cabling technology used by operators of oil and gas wells to lower equipment or measurement devices into the well for the purposes of well intervention and reservoir evaluation. Braided line can contain an… …
90History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
