USS S-17 (SS-122) was a second-group (S-3 or "Government") S-class submarine of the United States Navy. Construction and commissioning S-17′s keel was laid down on 19 March 1918 by the Lake Torpedo Boat Company in Bridgeport, Connecticut. She was launched on 22 May 1920, sponsored by Mrs. Raymond G. Thomas, and commissioned on 1 March 1921. Service history 1921–1935 Departing from New London, Connecticut, on 31 May 1921, S-17 sailed via the Panama Canal, California, Hawaii, and Guam to the Philippines, arriving at Cavite, Luzon, on 1 December. In 1922, she sailed from Manila Bay on 11 October, visited Hong Kong from 14–28 October, and returned to Cavite on 1 November. Sailing from Manila on 15 May 1923, S-17 visited Shanghai, Chefoo, and Chinwangtao, before returning via Woosung and Amoy to Cavite on 11 September. In the summer of 1924, she visited Shanghai, Tsingtao, Chefoo, and Chinwangtao, before returning via Chefoo and Amoy to Olongapo, Luzon, on 23 September. Departing Cavite on 29 October, she arrived at Mare Island, California, on 31 December. Remaining at Mare Island in 1925 and 1926, she operated along the California coast in 1927, mainly at Mare Island, California, San Diego, California, and San Pedro Submarine Base, San Pedro, California. From February 1928 into December 1934, S-17 served in the Panama Canal area. Departing from Coco Solo on 10 December 1934, S-17 was decommissioned on 29 March 1935 at Philadelphia, Pennsylvania. 1940–1944 S-17 was recommissioned on 16 December 1940. After voyages to Bermuda, S-17 operated in the Panama Canal area from December 1941 to February 1942. On 28 February 1942, she was operating at periscope depth when a United States Marine Corps plane dropped a bomb targeting her periscope. Later in the day, the same or a different Marine Corps plane dropped a bomb that landed within of her while she was on the surface. S-17 suffered no damage or casualties in either incident. S-17 operatwed from Saint Thomas in the United States Virgin Islands, in March 1942 and in the Panama Canal area again from April to August 1942. At 14:20 on 4 August 1942, a U.S. plane attacked her at with four depth charges while she was operating on the surface in the Caribbean Sea, inflicting damage that prevented her from diving. S-17′s crew identified the attacking aircraft as a U.S. Army Air Forces B-25 Mitchell bomber, and one source describes it as