Airport elevation is defined as the reduced level (above M.S.L.) of which point on the aerodrome?

Introduction:
Accurate elevation data is crucial for instrument procedures, obstacle assessment, and performance calculations. Airport elevation provides a standard reference for altimetry and charting.

Given Data / Assumptions:

• Elevation referenced to Mean Sea Level (M.S.L.).
• Landing area includes runway system and usable surfaces.

Concept / Approach:

Airport elevation is typically defined as the elevation of the highest point of the landing area, ensuring conservative margins for obstacle clearance and instrument procedure altitudes.

Step-by-Step Solution:

Verification / Alternative check:

This convention avoids understating terrain; if multiple thresholds differ, the highest usable point governs the published elevation.

Why Other Options Are Wrong:

• Control tower: Not standardized for elevation reference.
• Lowest point: Would under-represent terrain for procedures.
• Threshold of shortest runway: Not necessarily the controlling elevation.
• None of these: Incorrect because a correct definition exists.

Common Pitfalls:

• Confusing aerodrome elevation with threshold elevations or touchdown zone elevation (TDZE) used on approach charts.

Final Answer:

highest point of the landing area