USS Sierra (AD-18)
 USS Sierra (AD-18) was a destroyer tender that served with the United States Navy from World War II to the 1990s.The second U.S. Navy ship to bear the name Sierra was laid down on 31 December 1941 by the Tampa Shipbuilding Company of Tampa Florida; launched on 23 February 1943; and commissioned on 20 March 1944 Captain P. B. Koonce in command.