According to ICAO recommendations, what is the rate of elevation correction for the runway above MSL?
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A.
2% for every 300 m of elevation above MSL
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B.
1% for every 100 m of elevation above MSL
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C.
2% for every 500 m of elevation above MSL
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D.
7% of every 300 m of elevation above MSL
Correct Answer:
D. 7% of every 300 m of elevation above MSL
Explanation:
According to ICAO standards, the basic runway length must be adjusted to account for the reduced air density found at higher altitudes. Thinner air decreases both engine thrust and wing lift, requiring an aircraft to achieve a higher ground speed for takeoff. To accommodate this, ICAO recommends increasing the runway length by 7% for every 300 meters (approximately 1,000 feet) of elevation above Mean Sea Level (MSL).
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