Drone Pilot Practice Exam

How does a high level of humidity typically affect a pilot's perception of altitude?

1. It Makes Altitude Harder to Judge

2. It Does Not Affect Perception

3. It Makes Altitude Easier to Judge

4. It Can Help in Navigation

The correct answer is: It Makes Altitude Harder to Judge

A high level of humidity can significantly impact a pilot's perception of altitude primarily due to its effect on atmospheric conditions. When humidity levels are elevated, the air is denser and can create visual distortions. This can lead to a phenomenon known as "haze," which obscures visibility and makes it more challenging to accurately gauge distances and altitude. In humid conditions, the horizon may appear to blur, and the contrast between the ground and the sky can decrease. This reduction in visual clarity can cause pilots to misjudge their altitude, as the cues they normally rely on for depth perception become less reliable. Additionally, the presence of moisture in the air can lead to the formation of clouds or fog, which further obscures visual references that are crucial for maintaining proper altitude perception. By understanding how high humidity affects visibility and perception, pilots can take appropriate measures to verify their altitude, such as relying on instruments instead of visual estimation, which is critical for ensuring safety during flight.