What are the three sensory systems?

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

Answer: (C)

Spatial orientation relies on three sensory inputs: vision, postural sense, and the vestibular system. Vision provides external references such as the horizon and cockpit cues to judge attitude and motion. The vestibular system in the inner ear detects head movements and acceleration, giving you awareness of turns or climbs even when your eyes can’t clearly see the outside. The postural sense, or proprioception, comes from sensors in muscles, joints, and skin that tell you where your body parts are in relation to each other and to gravity. Together, these three provide a complete picture of your position in space, which is crucial when flying by reference to instruments and limited outside cues. The other options include an input that isn’t a primary orientation cue (auditory) or label proprioception differently, but the combination Visual, Postural, and Vestibular matches how these senses are described in instrument flying contexts.