What should a pilot do to alleviate symptoms of motion sickness?

Focusing on objects outside the plane is a strategy that can effectively alleviate symptoms of motion sickness. This technique helps the brain reconcile conflicting sensory signals. When a person is inside a moving vehicle, such as an aircraft, the inner ear detects motion while the eyes may not perceive it in the same way, leading to a sensory mismatch that results in motion sickness. By looking at stable, distant objects outside the plane, the pilot can help the brain interpret the movement more accurately and reduce feelings of nausea and discomfort. This approach engages the visual system, which can reinforce that the body is indeed moving, thereby helping to mitigate the adverse effects of the sensory conflict.

In contrast, the other options can exacerbate motion sickness. Closing fresh air vents can limit airflow, leading to discomfort, while making unnecessary head movements can further disturb the inner ear's balance system, intensifying symptoms. Limiting fluid intake may lead to dehydration, which can worsen overall well-being during a flight and potentially increase feelings of nausea.