Which statement about glide slope and a VASI-equipped approach is true?

• A. You should maintain the glide slope for safe obstruction clearance
• B. You should ignore glide slope during daylight
• C. You should always descend below glide slope immediately
• D. You should ascend above glide slope at will

Answer: (A)

Following the glide slope along with a VASI-equipped approach keeps you on a safe vertical path designed to clear obstacles as you descend to the runway. The glide slope provides a fixed descent angle, and the VASI gives a visual cue about your position relative to that path. By staying on the glide slope, you ensure you’re descending at the appropriate rate and altitude to reach the runway safely. Deviating from it—whether by ignoring it, descending below it too soon, or climbing above it at will—can compromise obstacle clearance and lead to an unstable or unsafe approach. So the statement that you should maintain the glide slope for safe obstruction clearance is the correct and best guidance.