(SS-35: dp. 392 (surf.), 521 (subm.); l.153'7"; b. 16'8"; dr. 13'; s. 14 k. (surf.), 10.5 k. (subm.); cpl. 28; a. 4 18" tt.; cl. K-3)
K-4 (SS-35), originally named Walrus, was renamed 17 November 1911; launched 19 March 1914 by the Moran Co., Seattle, Wash.; sponsored by Mrs. James P. Olding, wife of the commanding officer; and commissioned 24 October 1914, Lt. J. P. Olding in command.
Joining the Pacific Torpedo Flotilla, K-4 operated along the coast of California, conducting constant exercises and experiments to develop the techniques of submarine warfare. From 14 October 1915 to 31 October 1917 she carried out similar operations in the Hawaiian Islands. When America's involvement in World War I called for increased naval activity, K-4 departed Hawaii for service out of Key West, arriving 9 January 1918. For the rest of the war she remained at Key West, where she patrolled the Florida peninsula. After the Armistice of 11 November 1918, K-4 operated along the East Coast training officers and men for duty in submarines. She continued these duties for 4 years before arriving at Hampton Road, Va., 24 March 1923. K-4 decommissioned there 19 May 1923 and was sold as scrap 3 June 1931.