Sergeant Jose Flores, a sensor team chief with Headquarters Battery, 11th Marine Regiment, 1st Marine Division, teaches Marines how to use the Defense Advanced Global Positioning System Receiver during the Battery Supervisors Course held at Marine Corps Base Camp Pendleton, Calif., Sept. 28, 2016. The course shows Marines how to properly set up a battery unit and control the unit from leadership positions. The DAGR is a tool used to orient battery cannons such as the M777 Howitzer. ( Marine Corps Photo by Cpl. Justin Huffty)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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