ALS in sight allowed descent to what altitude above the TDZ?

• A. 100 feet above the TDZ
• B. 50 feet above the TDZ
• C. 200 feet above the TDZ
• D. On the TDZ level

Answer: (A)

When you have the ALS in sight, you’re allowed to transition from the published minimum descent altitude to a lower height during the visual segment, specifically down to 100 feet above the touchdown zone. This provides a safe margin while you confirm the runway and maintain the proper visual references to complete the landing. If you don’t have the approach lights and runway environment in sight, you stay at the published minimums. The 100-foot limit above the TDZ ensures you’re not too close to the ground before you can clearly see the runway and environment. Descending to 50 feet above the TDZ or to the TDZ level, or staying higher than 100 feet, isn’t permitted for this visual descent phase.