transported a force from Britain's 41 (Independent) Commando Royal Marines in a raid on the northeast coast of Korea west of Tanchon. The target, a train tunnel on the north-south supply line, was destroyed, with the loss of one man who was buried at sea. The commanding officer, Lieutenant Commander R. D. Quinn, became the only submarine commanding officer to receive a combat award during the Korean War when he was awarded the Bronze Star for this action. During this time, the Perch was fitted with a large sausage shaped hangar on her aft deck. Operational tests were made with both helicopter and amphibious boats. 1950s From August 1951 to March 1952, Perch underwent overhaul at Mare Island. From 1952 to 1954, Perch trained, making "reconnaissance-runs" and "raids" on several Alaskan and Hawaiian islands. In January 1955 Perch made a cruise to WestPac conducting a "reconnaissance and raid" on Iwo Jima and observed other islands in the Bonin Chain. Periods between Far Eastern cruises, Perch performed type training and intertype amphibious exercises in the San Diego area. Perch, again classified as a Submarine Transport, APSS-313, on 24 October 1956, departed San Diego 5 November for a reconnaissance exercise in the Panama Canal Area, returning to San Diego 11 December. In late 1957 she made a reconnaissance voyage from San Diego to Hawaii and Alaska, and spent most of 1958 and 1959 in amphibious training exercises in the San Diego area with marines and Underwater Demolition Teams. In December 1959 Perch departed San Diego, decommissioned on 31 March 1960, and entered the Mare Island Group of the Pacific Reserve Fleet at Vallejo, Calif. 1960s–1970s Perch recommissioned 11 November 1961, Lt. Comdr. C.H. Hedgepeth in command, trained on the West Coast and Hawaii through 1962, and arrived at her new homeport, Subic Bay, Philippine Islands in March 1963. Her operations consisted of training the U.S. Marine's Amphibious Recon Battalion, Army Special Forces, and Navy UDTs in reconnaissance and also in providing training services to allied countries. In May and June 1964 Perch traveled to Mindoro and trained with British commando forces. July and August were spent in Hong Kong, Pohong Bay, Korea (with R.O.K. Special Forces), Yokosuka and Okinawa, Japan. March and April 1965, saw Perch participating in exercise "Jungle Drum III" by landing 75 Marine Corps reconnaissance personnel on the Malay Peninsula from the Gulf of Siam. Perch conducted search and