1919–1930 R-10 fitted out at the
Boston Navy Yard, during the fall of 1919, she joined Submarine Division 9, with the new year, 1920, and departed for winter maneuvers in the
Gulf of Mexico, on 15 January. Based at
Pensacola, Florida, she completed final
trials during March, and in mid-April, returned to
New England. On 18 May 1920, she arrived at
Newport, Rhode Island. When the US Navy adopted its
hull classification system on 17 July 1920, she received the
hull number SS-87.
R-10 operated out of Newport, and
New London, Connecticut. With the fall she proceeded south again, underwent overhaul at
Norfolk, Virginia, remaining until April 1921. She then headed for the
Panama Canal, and duty in the
Pacific.
R-10 arrived at
San Pedro, California, on 30 June, for a two-year tour. Toward the end of September, she added
salvage operations to her record as she assisted the
minesweeper , in raising
R-10s
sister boat , from the bottom of
San Pedro Harbor, on 13 October, then resumed individual and squadron exercises. In July 1923,
R-10 shifted to
Pearl Harbor, where for the next seven and a half years she conducted training operations, including fleet problems, made occasional runs as far west as
Midway Island, and as far east as the
West Coast, and participated in
air-sea rescue operations for planes initiating transpacific air travel. Ordered back to the
Atlantic, in 1930,
R-10 cleared Pearl Harbor, for the last time, on 12 December.
1931–1939 On 9 February 1931,
R-10 arrived at New London, and assumed training duties for the
Submarine School there. During the spring, she underwent overhaul at
Portsmouth, New Hampshire, and in the summer added
anti-submarine warfare (ASW)
destroyer training, and
NROTC cruises, to her mission. Through the decade she continued her role as a training submarine, and operated primarily off the New England coast, with occasional temporary duty at stations on the mid-
Atlantic seaboard, including the Diving School, at
Piney Point, Maryland, in May 1937.
1940–1946 In September 1940,
R-10 participated in
Bureau of Ordnance tests at Norfolk, then returned to New London. The following year she was transferred to
Key West, Florida. From 1941, until the winter of 1943, she alternated patrols in the
Yucatán Channel and the
Florida Straits, with operations for the
Fleet Sonar School, at Key West. Then, for the remainder of World War II, she concentrated on training duties. During February, and into March 1945, she operated out of
Port Everglades, Florida, then returned to Key West, where she remained until 4 June. ==Fate==