09 February 2015 Amphibious Roots: CLB-31 Executes a Live-fire Exercise Aboard Ship For Cpl. Derrick Gary, a massive, rocking amphibious assault ship in the middle of the ocean with a cool breeze blowing onto to its flight deck is not the normal setting for a shooting exercise.U.S. Marines with Combat Logistics Battalion 31 executed a live-fire shooting exercise Feb. 4 on the...