Which distance is used to determine required runway for touch and go landings?

The correct choice focuses on using the shortest of TORA (Takeoff Run Available), ASDA (Accelerate Stop Distance Available), or LDA (Landing Distance Available) to determine the required runway for touch and go landings.

This is important because during a touch and go landing, the aircraft performs a landing and then takes off again without coming to a complete stop. The landing distance available is crucial, as it must accommodate the aircraft’s landing roll, while the takeoff run available ensures that there is enough space for the subsequent takeoff. When evaluating runway needs for touch and go operations, safety dictates that one should always consider the most limiting factor, which is found in the shortest available distance among TORA, ASDA, and LDA. Utilizing this minimum distance ensures that there is sufficient runway to perform both the landing and subsequent takeoff safely, especially considering various aircraft performance factors such as weight and environmental conditions.

The other options do not apply correctly to this specific situation. Focusing on the maximum distances, average lengths, or runway gear lengths does not adequately account for the operational requirements specific to touch and go landings, which are best determined by the most limiting available distance.