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periscopic sextant

Sextant — This article is about the sextant as used for navigation. For the astronomer s sextant, see Sextant (astronomical). : For the history and development of the sextant see Reflecting instruments A sextant is an instrument generally used to measure… … Wikipedia
Air navigation — The principles of air navigation are the same for all aircraft, big or small. Air navigation involves successfully piloting an aircraft from place to place without getting lost, breaking the laws applying to aircraft, or endangering the safety of … Wikipedia
Boeing T-43 — Infobox Aircraft name= T 43 Bobcat caption= A Boeing T 43A of the USAF 562nd Flying Training Squadron type= Military training and transport aircraft manufacturer= Boeing designer= first flight= introduced= September 1973 retired= status= Active… … Wikipedia