LAHSO touchdown: which distance is used as the cutoff?

LAHSO touchdown: which distance is used as the cutoff?

• A. The longer of the first one-third of the available landing distance and the first 3,000 ft
• B. The full available landing distance
• C. The first 2,000 ft
• D. The shorter of the first one-third of the available landing distance and the first 3,000 ft

Answer: (D)

The concept behind LAHSO is that you must be able to land and stop before the hold-short point with a safe margin. The distance used to judge if you can accept a LAHSO clearance is the shorter of two calculated values: one-third of the available landing distance (ALD) and 3,000 feet. This keeps the required stop distance conservative—especially on longer runways where braking can vary with conditions—while also capping the maximum LAHSO distance to not overly constrain operations on long runways. If your aircraft would require more distance than this cutoff to stop safely, you should not accept the LAHSO clearance.

The concept behind LAHSO is that you must be able to land and stop before the hold-short point with a safe margin. The distance used to judge if you can accept a LAHSO clearance is the shorter of two calculated values: one-third of the available landing distance (ALD) and 3,000 feet. This keeps the required stop distance conservative—especially on longer runways where braking can vary with conditions—while also capping the maximum LAHSO distance to not overly constrain operations on long runways. If your aircraft would require more distance than this cutoff to stop safely, you should not accept the LAHSO clearance.