In a precision approach, glide path interception typically occurs at heights above runway elevation in which range?

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Study for the Type Rating Law Test. Engage with flashcards and multiple-choice questions, with hints and explanations. Prepare thoroughly for your certification exam and enhance your understanding of aviation law!

Multiple Choice

In a precision approach, glide path interception typically occurs at heights above runway elevation in which range?

Explanation:
On a precision approach, you join the glide path at a point several miles from the runway, and the altitude you’re at above the runway depends on how far you are from the threshold. The glide path is a fixed angle, about 3 degrees, so the height above the runway is linked to distance to the runway by h ≈ d × tan(3°). With tan(3°) ≈ 0.0524, if you intercept the glide slope roughly 3 to 9 nautical miles from the runway, the height above the runway comes out to about 0.165 to 0.471 nautical miles, which is roughly 300 to 900 meters. That range (300–900 m) is the typical band where interception occurs, providing a stabilized, safe descent path with adequate obstacle clearance. Intercept much closer to the runway or much farther out would place you outside the usual design and handling characteristics of the glide path.

On a precision approach, you join the glide path at a point several miles from the runway, and the altitude you’re at above the runway depends on how far you are from the threshold. The glide path is a fixed angle, about 3 degrees, so the height above the runway is linked to distance to the runway by h ≈ d × tan(3°). With tan(3°) ≈ 0.0524, if you intercept the glide slope roughly 3 to 9 nautical miles from the runway, the height above the runway comes out to about 0.165 to 0.471 nautical miles, which is roughly 300 to 900 meters. That range (300–900 m) is the typical band where interception occurs, providing a stabilized, safe descent path with adequate obstacle clearance. Intercept much closer to the runway or much farther out would place you outside the usual design and handling characteristics of the glide path.

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