Altitude Reference Systems
Altitude Reference Systems ✈️📏
1. QFE (Field Elevation) - Green
- Altimeter reads height above the airport.
- If set to 0 at the airport, altitude shows distance from the ground.
2. QNH (Mean Sea Level - MSL) - Blue
- Altimeter reads altitude above sea level.
- Used for general flight operations below transition altitude.
3. Standard (Flight Level - FL) - Red
- Altimeter set to 1013.25 hPa (Standard Pressure).
- Used above transition altitude for uniform separation.
Pilots adjust altimeter settings for accurate altitude readings!
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