(SP‑28: t. 18 (gr.); l. 56'; b. 9'6"; dr 2'9"; s. 20 k.; cpl. 7; a. 1 mg.)
A former name retained. The second Mauna Loa is named for a 13,680‑foot volcano in the Hawaii Volcanoes National Park, island of Hawaii.
The first Mauna Loa, a motor yacht, was built by George Lawley & Sons, Neponset, Mass., in 1916; acquired by the Navy under free‑lease contract from A. C. James 10 May 1917; and commissioned the next day.
Mauna Loa was called in for special duty during World War I, operating off the 1st Naval District until the Armistice. She decommissioned 5 December and was returned to her owner the same day.