USS Moonstone (PYc-9)
 USS Moonstone (PYc-9) was a coastal patrol yacht in the service of the United States Navy. She was built in 1929 as Nancy Baker by Germaniawerft in Kiel Germany later renamed Mona and subsequently acquired by the Navy as the Lone Star on 10 February 1941. Renamed Moonstone and designated PYc-9 she was converted for Navy service in Jacksonville Florida and commissioned on 10 April 1941.