The 505th Quartermaster Battalion Distinctive Unit Insignia, also called a unit crest or DUI, was approved on 2 June 1988. “Proud To Pump,” the Battalion motto emblazoned as a crest, is a reference to the organization’s mission of operating a petroleum pipeline and terminal in Okinawa, Japan as part of its control of the Army’s strategic bulk fuel and quality control missions on the island. Black is another reference to the resource for which the Battalion was responsible.
In the center of the shield portion of the insignia are three chevronels that represent support and simply movement, with the key superimposed over them as an allusion to the control of supply. The bow of the key holds a stylized chrysanthemum, imagery adapted from the Imperial Seal of Japan and used to denote the unit’s location.
Distinctive Unit Insignias are worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device. 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.
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The 505th Quartermaster was responsible for providing bulk fuels support not only for Army organizations, but also for all Department of Defense Activities on Okinawa, with a 100-mile pipeline system that stretched from Futenma Marine Corps Air Corps Station in the south to Tengan near Camp Courtney in the north. On 15 March 2013, the Defense Logistics Agency (DLA) Energy completed a 30-month transition process by assuming bulk fuel and quality control missions on Okinawa, assuming the 505th Quartermaster Battalion’s mission and replacing it with a new DLA Energy Pacific Office.