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In the absence of external reference points, the sensation that the vehicle in which you sitting is moving when it is in fact the vehicle directly alongside which is moving is…

  • A
    a cognitive illusion.
  • B
    a somatogravic illusion.
  • C
    an autokinetic illusion.
  • D
    an illusion of relative movement.
Illusion of Relative Movement is a common illusion which may fool the pilots when the aircraft is on the ground. A common example is when you are stopped at a traffic light in your car and the car next to you edges forward. Your brain interprets this peripheral visual information as though you are moving backwards and makes you apply additional pressure to the brakes. A similar illusion can happen while taxiing an aircraft.
  • A loading bridge moving away from the aircraft may give an illusion that it is the aircraft that is moving. When arriving at a gate which itself may be moving the pilot may believe that the aircraft is stationary and apply the parking brake.

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