HAL

Definition of HAL

HAL or Height Above Landing is the vertical distance between the aircraft’s altitude and the landing surface or runway thresholds. It’s a crucial parameter in aviation, and pilots must maintain a safe and accurate HAL during takeoff, flying, and landing.

During landing, the HAL is measured using instruments onboard the aircraft that calculate the altitude and distance above the runway. Pilots need to ensure that they maintain a safe HAL, which is dependent on a range of factors like weather conditions, airspeed, and distance to touchdown.

In case of low visibility, the HAL plays a vital role in assisting pilots to land safely, as they rely on instruments in the cockpit to determine the correct HAL and landing approach path. HAL is also essential in managing the landing approach angle and touchdown spot.

In summary, HAL is a critical parameter used in aviation to maintain safe landing practices. Pilots need to maintain a constant check on HAL to ensure safety and precision during takeoff, flying, and landing.