Pfc. Nathaniel Geelhoed tests a dial caliper’s accuracy July 23, 2018 at Camp Kinser, Okinawa, Japan. A dial caliper is used to measure small objects and must provide precision within one-thousandth of an inch. Geelhoed, a native of Pocahontas, Arkansas, is a calibration technician with Electronics Maintenance Company, 3rd Maintenance Battalion, Combat Logistics Regiment 35, 3rd Marine Logistics Group. (U.S. Marine Corps photo by Pfc. Mark Fike)