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According to ICAO Doc 8168 PANS-OPS, consecutive flight levels are separated by a pressure interval that corresponds to at least _____ (1) ft in the standard atmosphere. What is the correct value at (1)?

  • A
    250 ft
  • B
    1000 ft
  • C
    2000 ft
  • D
    500 ft

ICAO Doc 8168
Chapter 2. BASIC ALTIMETER SETTING REQUIREMENTS
2.1.1 System of flight levels

2.1.1.1 Flight level zero shall be located at the atmospheric pressure level of 1013.2 hPa. Consecutive flight levels shall be separated by a pressure interval corresponding to at least 500 ft (152.4 m) in the standard atmosphere.

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