The 5" /54 caliber lightweight gun is a U.S. naval artillery gun mount consisting of a 5 in (127 mm) L54 Mark 19 gun on the Mark 45 mount. It was designed and built by United Defense, a company later acquired by BAE Systems Land & Armaments, which continued manufacture.

USS Dewey (DDG-105) is an Arleigh Burke-class guided missile destroyer in the United States Navy. Dewey is the third Navy ship named after Admiral of the Navy George Dewey, hero of the Battle of Manila Bay during the Spanish–American War.