Atlantic Ocean (Sept. 22, 2004) - The guided missile destroyer USS Winston S. Churchill (DDG 81) fires its MK-45 Mod 4, 5-inch/62-cal, lightweight gun mount during an exercise in the Virginia Capes Operating area in the Atlantic Ocean. Churchill is the only U.S. Navy vessel in active service named after a foreign dignitary. The MK-45 Mod 4 is the latest version of the MK-45 gun mount, designed to be used with the Mark 171 Extended Range Guided Munition (ERGM) for over-the-horizon range and ...