Metal Detector Marine Corps Pfc. Caleb Pratt uses a compact metal detector during a patrol at Camp Pendleton, Calif., Sept. 18, 2017. Pratt is a combat engineer assigned to Bravo Company, 7th Engineer Support Battalion, 1st Marine Logistics Group. Marine Corps photo by Lance Cpl. Roderick Jacquote SHARE IMAGE: Download Image: Full Size (1.63 MB) Tags: training, Northcom, Northern Command, MARINE CORPS, MARINES Photo By: Lance Cpl. Roderick Jacquote VIRIN: 170918-M-RX597-005A.JPG Photo Gallery