Which option is NOT one of the three sensory systems used in aviation physiology?

• A. Visual
• B. Auditory
• C. Vestibular
• D. Postural

Answer: (B)

Three primary senses guide orientation in flight: vision, the vestibular system, and proprioception (postural sense). Vision provides the horizon line, outside cues, and instrument readings that help you judge attitude and flight path. The vestibular system in the inner ear detects rotation and acceleration, giving you a sense of motion even if you can’t see outside; however, it can be misleading in some unusual attitudes, so pilots must corroborate with other senses and instruments. Proprioception, or postural sense, informs you about the position and movement of your body and limbs, which helps you maneuver and maintain control, especially when visual cues are limited.

Auditory input, while crucial for alerts, alarms, and communication, does not provide information about aircraft attitude or movement. Therefore, it is not considered one of the primary sensory systems used for aviation orientation.