R-19's keel was laid down by the Union Iron Works of San Francisco on 23 June 1917. She was launched on 28 January 1918 sponsored by Mrs. Robert L. Irvine, and commissioned on 7 October 1918.
United States Navy service
After commissioning, which was one month before the Armistice with Germany ending World War I took effect, R-19 remained on the West Coast of the United States for nine months at San Pedro Submarine Base , San Pedro, Los Angeles until March 1919, and then at San Francisco, undergoing overhaul, until June 1919. On 17 June 1919 R-19 left the United States for the Territory of Hawaii. Eight days later she reached Pearl Harbor in Hawaii and began almost 12 years of training submarine crews and testing equipment.
During July 1920 the hull classification symbol of R-19 was changed from "Submarine Number 96" to "SS-96."
R-19 was recommissioned on 6 January 1941, then went to the Naval Submarine Base New London at Groton, Connecticut, where she was reconditioned. During May 1941, R-19 headed south. For the remainder of the spring, summer, and into the fall of 1941, she patrolled and conducted training exercises in the Virgin Islands and off the Panama Canal Zone. In October 1941, R-19 returned to Groton and continued her role as a training submarine.
R-19 was transferred to the United Kingdom under the terms of Lend-Lease on 9 March 1942. Commissioned into the Royal Navy, she was renamed HMS P.514.
In June 1942 she sailed for St. John's, Newfoundland, under the command of Lieutenant Walter Phillimore, RN.[1] At 0300 on 21 June 1942, while on surface, P.514 encountered a Royal Canadian Navyminesweeper, HMCS Georgian, off Newfoundland. Unaware of any friendly submarines in the area and receiving no reply to her challenge, Georgian rammed P.514, which sank with the loss of all hands.[1][2]