The Distinctive Unit Insignia (AKA unit crest or DUI) of the United States Army Intelligence and Security Command (INSCOM) was approved 6 April 1977 and subsequently was amended to change the colors on 27 May 1988. Its globe with stylized lines of longitude and latitude symbolize the worldwide scope of the Intelligence gathered and analyzed by the Command. The double-warded key symbolizes security and control, while the blue background epitomizes coolness and courage. Oak leaves at the base of the insignia denote fortitude, strength, and endurance, and the gold used for the lines, key, and leaves represents excellence and wisdom.
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Also known as a unit crest or DUI, a Distinctive Unit Insignia is worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device. It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (ASU, Enlisted only) with the base of the insignia toward the outside shoulder seam. Current regulations do not permit the DUI to be worn on the Dress variations of either uniform, however.
Enlisted personnel wear the insignia centered on a shoulder loop by placing it an equal distance from the outside shoulder seam to the outside edge of the shoulder-loop button. Officers (except Generals) wearing grade insignia on the shoulder loops center the DUI by placing it an equal distance between the inside edge of the grade insignia and the outside edge of the button.
More guidance on wear of the DUI is found in DA Pamphlet 670-1, Section 21-22, "Distinctive unit insignia" and 21–3(d) and (e), "Beret" and
"Garrison Cap," respectively.