flight level

Standard pressure altitude

Flight level is a standardized altitude used in aviation, expressed as a number representing hundreds of feet above a reference pressure setting.

Cruising at flight level three-five-zero means 35,000 feet.

Unlike altitudes measured from sea level, flight levels allow aircraft to maintain consistent vertical separation regardless of local atmospheric pressure variations.

The system keeps high-altitude traffic organized and safely spaced.

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air traffic control · radio call · altimetry · restricted airspace · separation · barometric pressure · cockpit instruments · height · elevation · thin air · hypoxia · oxygen mask · stratosphere · traffic · cabin · ATC · clearance · holding pattern

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