calculated altitude

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• calculated altitude — The celestial angle between a celestial body and the observer’s horizon calculated mathematically or observed from a given position on the earth at a given time …   Aviation dictionary

• Altitude diving — is scuba diving where the surface is 300 meters (1,000 feet) or more above sea level (for example, a mountain lake). [cite book |title=Encyclopedia of Recreational Diving, 3rd edition |last=Brylske |first=A. |year=2006 |publisher=PADI… …   Wikipedia

• Density altitude — Computation Chart. Density altitude is the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density at the place of observation, or, in other words, the height when measured in terms of… …   Wikipedia

• transition altitude — The altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes (ICAO). The height above the aerodrome of the transition altitude is as low as possible but normally not less than 3000 ft (900 m). The… …   Aviation dictionary

• obstacle-clearance altitude (OCA)/obstacle-clearance height — The lowest altitude or height above the elevation of the relevant runway threshold or the airport elevation as applicable, used in compliance with appropriate obstacle clearance criteria. Obstacle clearance altitude is referenced to mean sea… …   Aviation dictionary

• barometric altitude — The altitude determined by a barometric altimeter by reference to a pressure level and calculated according to the standard atmosphere laws. See also altitude …   Military dictionary

• barometric altitude — The altitude determined by a barometric altimeter pressure level and calculated according to the standard atmospheric laws. It corresponds to the difference in altitude between the altimeter pressure level and the mean sea level pressure …   Aviation dictionary

• Intercept method — The Intercept Method , or Marcq St Hilaire method , as it is also rather inaccurately known, is an astronomical navigation method of calculating an observer s position on earth. It was originally called the azimuth intercept method because the… …   Wikipedia

• Kármán line — The Kármán line lies at an altitude of 100 km (62.1 miles) above the Earth s sea level, and is commonly used to define the boundary between the Earth s atmosphere and outer space. [cite web|url=http://www.fai.org/press releases/2004/documents/12… …   Wikipedia

• Shell (projectile) — This article is about the artillery projectile. For the small arms ammunition, see Shotgun shell. Some sectioned shells from the First World War. From left to right: 90 mm fragmentation shell, 120 mm pig iron incendiary shell, 77/14 model 75 mm… …   Wikipedia

• Luna 15 — (Ye 8 5 series) was an unmanned space mission of the Luna program, also called Lunik 15.Luna 15 was a last minute Soviet attempt to steal some of Apollo 11 s publicity by being the first mission to return lunar soil to Earth. Luna 15 was placed… …   Wikipedia