U.S. Army's 149th Seaport Operations Company, 10th Battalion, 7th Transportation Brigade (Expeditionary), conducts a roll-on, roll-off training exercise on Fort Eustis' 3rd Port at Joint Base Langley-Eustis, Va., Feb. 1, 2018. Multiple vehicles were guided onto a vessel while a safety officer directed vehicle movements from above. (U.S. Air Force photo by Airman 1st Class Monica Roybal)