ground liaison officer

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ground liaison officer (GLO)

An army officer trained in offensive air support activities. Ground liaison officers are normally positioned at air bases to provide a liaison to air force and naval units engaged in training and combat operations with surface forces.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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"The Army ground liaison officers also ensure the center stays abreast of the ground situation and knows the position of enemy forces, their projected troop movements and the location of [friendly] ground forces," Nichols explained.
Ground liaison officers were onboard and provided immediate readings of P-3 sensors for troops on the ground.