What is LDA in the context of aviation?

LDA stands for Landing Distance Available, which refers to the declared length available for the landing ground run of an aircraft. This measurement is critical for pilots as it indicates the length of runway that is safely available for an aircraft to land and come to a complete stop. Understanding this distance helps ensure that aircraft can safely land within the given parameters, taking into account factors like aircraft weight, weather conditions, and runway surface.

The other choices do not accurately capture the meaning of LDA. While the total length for takeoff and landing combined might seem relevant, it does not specifically pertain to landing alone. The maximum distance a plane can cover in an emergency landing is a different concept, focused more on the aircraft's glide capability rather than runway specifics. Lastly, the distance remaining after a go-around pertains to a situation where a landing approach is aborted, which again does not define the declared landing length. Thus, understanding that LDA specifically conveys the measured landing ground run length highlights its importance in aviation safety and operations.