USS R-20 (SS-97) was an R-class coastal and harbor defense submarine

United States R class submarine

The R-class submarines were a class of United States Navy submarines active from 1918 until 1945. The R-boats R-21 to R-27, built by Lake Torpedo Boat, slightly smaller and faster than the others, are sometimes regarded as a separate class from R-1 to R-20 built by Fore River Shipyard and Union...

 of the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

. Her keel was laid down on 4 June 1917 by the Union Iron Works

Union Iron Works

Union Iron Works, located in San Francisco, California, on the southeast waterfront, was a central business within the large industrial zone of Potrero Point, for four decades at the end of the nineteenth and beginning of the twentieth centuries.-History:...

 in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

. She was launched

Ship naming and launching

The ceremonies involved in naming and launching naval ships are based in traditions thousands of years old.-Methods of launch:There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching." The oldest, most familiar, and most widely...

 on 21 January 1918 sponsored by Mrs. Arnold Foster, and commissioned

Ship commissioning

Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to the placing of a warship in active duty with its country's military...

 on 26 October 1918 with Lieutenant Commander

Lieutenant Commander

Lieutenant Commander is a commissioned officer rank in many navies. The rank is superior to a lieutenant and subordinate to a commander...

 Alfred E. Montgomery in command.

1918–1931

Fitted out at San Pedro, California, R-20 remained off southern California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 operating between San Pedro and San Diego, California

San Diego, California

San Diego is the eighth-largest city in the United States and second-largest city in California. The city is located on the coast of the Pacific Ocean in Southern California, immediately adjacent to the Mexican border. The birthplace of California, San Diego is known for its mild year-round...

, until March 1919. She then moved to San Francisco, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

; underwent overhaul, and on 17 June got underway for Hawaii

Hawaii

Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

. She arrived at Pearl Harbor

Pearl Harbor

Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

 on 25 June.

Given hull classification symbol

Hull classification symbol

The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration use hull classification symbols to identify their ship types and each individual ship within each type...

 SS-97 in July 1920, she served with the fleet training submarine personnel and assisting in the development of submarine equipment and tactics for over a decade. On 12 December 1930, she departed Pearl Harbor and headed for Philadelphia, Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

, and inactivation. She arrived at Philadelphia on 9 February 1931; decommissioned on 15 May; and was berthed at League Island

League Island

League Island was an island in the Delaware River, part of the city of Philadelphia, just upstream from the mouth of the Schuylkill River, which was the site of the Philadelphia shipyard, which eventually became the Philadelphia Naval Shipyard, now known as the Philadelphia Naval Business...

.

1941–1946

R-20 recommissioned on 22 January 1941. In April she shifted to New London, Connecticut

New London, Connecticut

New London is a seaport city and a port of entry on the northeast coast of the United States.It is located at the mouth of the Thames River in New London County, southeastern Connecticut....

. There she trained personnel and conducted patrols until June. She then moved south to Key West, Florida

Key West, Florida

Key West is a city in Monroe County, Florida, United States. The city encompasses the island of Key West, the part of Stock Island north of U.S. 1 , Sigsbee Park , Fleming Key , and Sunset Key...

, arriving on 22 June to spend the remainder of her career as a training ship.

R-20 decommissioned at Key West on 27 September 1945 and was struck from the Naval Vessel Register

Naval Vessel Register

The Naval Vessel Register is the official inventory of ships and service craft in custody of or titled by the United States Navy. It contains information on ships and service craft that make up the official inventory of the Navy from the time a vessel is authorized through its life cycle and...

 the following month. On 13 March 1946, she was sold to Macey O. Scott of Miami, Florida

Miami, Florida

Miami is a city located on the Atlantic coast in southeastern Florida and the county seat of Miami-Dade County, the most populous county in Florida and the eighth-most populous county in the United States with a population of 2,500,625...

.