uçuş irtifası

listen to the pronunciation of uçuş irtifası
التركية - الإنجليزية
(Askeri) flight level
Any of several internationally agreed standard altitudes that are based on atmospheric pressure rather than on true height
Altitude expressed in hundreds of feet FL 350 is equal to 35,000 feet Below about 20,000 feet, Flight Levels are not used Military and some older civilian pilots may give their altitude in Angels An Angel is equal to 1,000 feet A pilot may also report his altitude as "level at 18,000" This is not the same as a Flight Level, but means that he has stopped climbing or descending at the indicated altitude
An altitude of constant atmospheric pressure related to a reference datum of 29 92 inches of mercury, stated in three digits in hundreds of feet In the US, the FL system is used for flights at and above 18,000 ft msl
A level of constant atmospheric pressure related to a reference datum of 29 92 inches of mercury Each is stated in three digits that represent hundreds of feet For example, flight level (FL) 250 represents a barometric altimeter indication of 25,000 feet; FL 255, an indication of 25,500 feet
means a level of constant atmospheric pressure related to a reference datum of 29 92 inches of mercury (1013 25 hPa) Each is stated in three digits that represent hundreds of feet For example, flight level 250 represents a barometric altimeter indication of 25,000 feet; flight level 255, an indication of 25,500 feet
Altitude above sea-level in 100 feet units measured according to a standard atmosphere Strictly speaking a flight level is an indication of pressure, not of altitude Only above the transition level (which depends on the local QNH but is typically 4000 feet above sea level) flight levels are used to indicate altitude, below the transition level feet are used