17.motion-sickness. Motion Sickness
Motion sickness, or airsickness, is caused by the brain receiving conflicting messages about the state of the body. A pilot may experience motion sickness during initial flights, but it generally goes away within the first few lessons as the body adapts. Anxiety and stress, which may be experienced at the beginning of flight training, can contribute to motion sickness.
Cause
Motion sickness arises from a sensory mismatch between the vestibular system (inner ear), the eyes, and the proprioceptive system (sensors in muscles, joints, and skin). For example, in turbulence the inner ear senses the airplane's motion while the eyes — fixed on a stationary instrument panel or cockpit interior — report no motion. The brain, unable to reconcile these conflicting inputs, responds with the symptoms commonly recognized as airsickness.
Factors that increase susceptibility include:
- Anxiety, stress, and apprehension, especially in early training.
- Turbulence and repeated maneuvering, particularly steep turns and stalls.
- Heat, poor cockpit ventilation, and unpleasant odors (fuel, exhaust, vomit).
- Reading charts or focusing on close-in tasks while the aircraft is bouncing.
- Hangover, fatigue, and an empty or overly full stomach.
Symptoms
Symptoms generally progress through identifiable stages and provide a warning before the pilot becomes incapacitated:
- General discomfort, apathy, or disorientation.
- Pale skin, cold sweating, and increased salivation.
- Headache, dizziness, and difficulty concentrating.
- Nausea, and ultimately vomiting.
Even mild symptoms degrade pilot performance — concentration, scan, and decision-making suffer long before vomiting occurs. A pilot experiencing motion sickness should not attempt to continue training tasks that worsen the condition.
In-Flight Remedies
If symptoms develop, the pilot or instructor should take the following corrective actions:
- Open the air vents and direct cool, fresh air on the face.
- Loosen restrictive clothing at the neck and waist.
- Look outside at a distant fixed point on the horizon rather than at instruments or charts. This helps the eyes confirm what the inner ear is sensing.
- Avoid unnecessary head movements, which aggravate vestibular conflict.
- Keep the eyes on a point in the direction of travel; sit upright with the head against the headrest.
- If a passenger is affected, give them something to focus on outside, and avoid abrupt maneuvers.
- Terminate the flight or return to straight-and-level cruise as soon as practical.
The FAA notes that severe airsickness may incapacitate a pilot. If symptoms become severe enough to interfere with flying, the pilot should declare the situation, ask ATC for assistance if necessary, and land at the nearest suitable airport.
Medications and Long-Term Management
Most over-the-counter and prescription motion sickness medications have side effects — drowsiness, blurred vision, slowed reaction time, and depressed mental processing — that are incompatible with the demands of piloting. Common drugs such as dimenhydrinate (Dramamine), meclizine (Bonine, Antivert), and the scopolamine patch are generally disqualifying for flight. A pilot should not fly while using any motion sickness medication unless it has been specifically approved by an Aviation Medical Examiner (AME).
For most student pilots, motion sickness diminishes naturally with experience. Recommended long-term management strategies include:
- Eat a light, non-greasy meal one to two hours before flight; do not fly on an empty stomach.
- Avoid alcohol the night before flying and stay well hydrated.
- Get adequate rest before each lesson.
- Schedule lessons during smoother times of day, such as early morning, while susceptibility is high.
- Increase exposure gradually; brief, frequent flights tend to desensitize the vestibular system more effectively than long ones.
- Practice maneuvers progressively, allowing time to adapt to steep turns, stalls, and slow flight.
- Keep cockpit ventilation strong and the cabin cool.
Most trainees who persevere find that motion sickness disappears within a handful of flights as the brain learns to integrate the new sensory environment. Persistent or recurring airsickness that does not improve with experience should be discussed with an AME, as it may indicate an underlying vestibular or medical condition.
Operational Considerations
A pilot who is actively manipulating the controls is far less likely to become airsick than a passenger, because anticipating the aircraft's motion reconciles vestibular and visual cues. For this reason, instructors often hand the controls to a student showing early symptoms — flying the airplane is itself a remedy. Conversely, instructors should brief passengers on motion sickness symptoms, provide airsick bags within reach, and avoid steep turns or extended maneuvering with susceptible passengers aboard. Clean cockpit hygiene, including immediate disposal of used airsick bags, prevents secondary onset due to odor.
Understanding motion sickness — its cause, recognition, and management — protects pilot performance, accelerates training progress, and contributes to passenger comfort and confidence in general aviation flying.