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  1. The density altitude is the altitude relative to standard atmospheric conditions at which the air density would be equal to the indicated air density at the place of observation. In other words, the density altitude is the air density given as a height above mean sea level. The density altitude can also be considered to be the pressure altitude ...

  2. The Kármán line (or von Kármán line / v ɒ n ˈ k ɑːr m ɑː n /) [2] is a conventional definition of the edge of space. It is not universally accepted. The international record-keeping body FAI (Fédération aéronautique internationale) defines the Kármán line at an altitude of 100 kilometres (54 nautical miles; 62 miles; 330,000 feet) above mean sea level .

  3. Datum used The most common and convenient datum which is internationally accepted is mean sea level which is a universal measure and based upon a common base line in the whole world determined by earth's gravitational model (see geoid) that gives the standard to measure elevation of a place above or below mean sea level. ...

  4. Altimeter setting is the value of the atmospheric pressure used to adjust the scale of a pressure altimeter so that it indicates the height of an aircraft above a known reference surface. This reference can be the mean sea level pressure (), the pressure at a nearby surface airport (QFE), or the "standard pressure level" of 1,013.25 hectopascals (29.92 inches of mercury) which gives pressure ...

  5. Metres above mean sea level and that there is also an acronym MAMSL, which might exists/be created for the new title after the move. Also, Height above mean sea level currently redirects to Sea level and needs to be changed after the move as well. Please proceed. -- Cheers, Rfassbind -talk 14:30, 9 August 2015 (UTC) Reply.

  6. Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site above the surrounding landscape. HAAT is used extensively in FM radio and television , as it is more important than effective radiated power (ERP) in determining the range of broadcasts ( VHF and UHF in particular, as they are line of sight ...

  7. With three volcanic cones — Kibo, Mawenzi and Shira — it is the highest mountain in Africa and the highest single free-standing mountain above sea level in the world: 5,895 m (19,341 ft) above sea level and 4,900 m (16,100 ft) above its plateau base. It is also the highest volcano in the Eastern Hemisphere .