What is the impact of wind on landing distance over a 50-foot obstacle?

The impact of wind on landing distance over a 50-foot obstacle is that it decreases landing distance when there is a favorable wind, meaning a headwind, which assists in slowing the aircraft down during the approach. This results in the aircraft reaching the obstacle at a slower ground speed, allowing for an earlier descent and reducing the distance needed to reach the obstacle safely.

Conversely, a tailwind increases landing distance, as it can accelerate the aircraft's groundspeed, making it require a longer run to stop after landing. The other options either suggest no effect or an advantage without specificity, which does not capture the reality of how wind impacts landing performance. Favorable wind conditions can play a vital role in reducing the required landing distance, especially in cases involving part of the approach that must clear an obstacle.