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Sgt. Michael J. Elgaen, standing left, briefs Marines Sept. 23 prior to their completion of a land navigation course at the Jungle Warfare Training Center, Camp Gonsalves. The participants learned how to use and apply terrain association in conjunction with traditional compass and distance measuring methods to find their assigned points. The Marines are with various units across III Marine Expeditionary Force. (U.S. Marine Corps photo by Lance Cpl. Ryan C. Mains/Released) - Sgt. Michael J. Elgaen, standing left, briefs Marines Sept. 23 prior to their completion of a land navigation course at the Jungle Warfare Training Center, Camp Gonsalves. The participants learned how to use and apply terrain association in conjunction with traditional compass and distance measuring methods to find their assigned points. The Marines are with various units across III Marine Expeditionary Force. (U.S. Marine Corps photo by Lance Cpl. Ryan C. Mains/Released)