Glideslope intercept altitude is defined as?

• A. The minimum altitude of an intermediate approach segment prescribed for a precision approach that ensures obstacle clearance.
• B. The altitude at which the approach is begun from the hold.
• C. The decision altitude for CAT II/III approaches.
• D. The altitude at which the localizer alignment is achieved.

Answer: (D)

The glideslope intercept altitude is the published altitude at which you begin to intercept and follow the vertical guidance of the glide path on an ILS approach. It’s chosen to ensure you can safely capture the glide slope and maintain obstacle clearance from that point down to the runway. This is about vertical guidance and when the glide path becomes usable, not about aligning with the localizer (lateral guidance) or about holding or the decision altitude for CAT II/III approaches.