What is the altitude range for Base Key in an ELP?

• A. 200-400 feet AGL
• B. 600-800 feet AGL
• C. 800-1000 feet AGL
• D. 400-600 feet AGL

Answer: (B)

In an Engine-out Landing Procedure (ELP), the altitude range for the Base Key typically falls within 600 to 800 feet Above Ground Level (AGL). This specific altitude range is critical because it allows pilots to effectively manage the glide distance towards the runway while maintaining a safe margin above the terrain. At this altitude, pilots can begin executing a series of controlled maneuvers to line up for landing while still having the capability to make adjustments based on their position and conditions.

Lower altitudes could restrict a pilot's options for adjustments and increase the risk of losing a suitable landing profile, while higher altitudes might prevent achieving the necessary glide slope and runway alignment efficiently. Therefore, the selection of 600 to 800 feet AGL as the Base Key altitude range is designed to ensure safety and effective glide path management during this critical stage of flight.