What is the allowed glidepath deviation on the stabilized approach to the correct vertical path?

What is the allowed glidepath deviation on the stabilized approach to the correct vertical path?

• A. ±1 dot
• B. ±2 dots
• C. ±1.5 dots
• D. ±0.5 dot

Answer: (A)

During a stabilized approach, you must stay on the glidepath within a tight tolerance. The glidepath deviation is displayed as dots on the vertical deviation indicator, and being within one dot keeps you close enough to the intended path to maintain safe obstacle clearance while allowing normal wind and instrument error. So the correct tolerance is within ±1 dot. Deviating more than that would exceed stabilization criteria and typically require adjustments or a go-around. Being tighter than that (±0.5 dot) is not the specified limit, and allowing ±2 or ±1.5 dots would let you wander farther off the path than allowed.

During a stabilized approach, you must stay on the glidepath within a tight tolerance. The glidepath deviation is displayed as dots on the vertical deviation indicator, and being within one dot keeps you close enough to the intended path to maintain safe obstacle clearance while allowing normal wind and instrument error.

So the correct tolerance is within ±1 dot. Deviating more than that would exceed stabilization criteria and typically require adjustments or a go-around. Being tighter than that (±0.5 dot) is not the specified limit, and allowing ±2 or ±1.5 dots would let you wander farther off the path than allowed.