London for the first two weeks in July, she returned to Key West at midmonth and until March 1945 alternated duties for the Fleet Sonar School with patrols in the Florida Strait and the Yucatán Channel. At Port Everglades, Florida, from 11 March to 15 April 1945, R-4 returned to Key West to prepare for inactivation. On 1 June she was withdrawn from active duty and on 4 June she got underway for Philadelphia. Escorted by SC-1001 she arrived at Philadelphia on 8 June, decommissioned on 18 June and was struck from the Naval Vessel Register on 11 July. The following January, 1946, she was sold for scrap to the North American Smelting Company. References External links 1925-9-12 Modest Heroes of the Submarine R-4 at Hawaii Aviation United States R-class submarines World War II submarines of the United States Ships built in Quincy, Massachusetts 1918 ships