USS Hilo (AGP-2) was a converted yacht that saw service as a motor torpedo boat tender in the United States Navy during World War II. It was originally the yacht Caroline built for Eldridge R. Johnson and launched 18 July 1931. Caroline was at the time the second largest yacht and largest American built Diesel yacht. It was built with a laboratory as well as palatial quarters and was loaned and equipped by Johnson for the Johnson-Smithsonian Deep-Sea Expedition of 1933 that explored the Puerto Rico Trench. The yacht was sold in 1938 to William B. Leeds and renamed Moana replacing an earlier Leeds yacht of the same name.