Practice question

WORKED ALTIMETRY CALCULATION: An aircraft is cruising at Flight Level 080 (1013.25 hPa datum). The local QNH reported by the nearest coastal station is 995 hPa. Assuming a standard pressure lapse rate of 30 feet per hPa, what is the aircraft's approximate true/indicated altitude above mean sea level?

  1. 8,540 ft
  2. 8,000 ft
  3. 7,450 ft
  4. 7,100 ft

Answer: C — 7,450 ft

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