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Optical systems employ _________ emitters on the helmet to measure the pilot’s head position.

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Optical systems employ _________ emitters on the helmet to measure the pilot’s head position.

(a) Heat

(b) Radio

(c) Ultrasonic

(d) Infrared

This question was addressed to me during an online interview.

My question is based upon Cockpit Overview topic in chapter Cockpit Overview of Aircraft Maintenance

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The correct option is (d) Infrared

Easy explanation: The optical systems employ infrared emitters on the helmet to measure the pilot’s head position. One of the limitations is sensitivity to sunlight or other heat sources.

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