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Segundo

Country United States Ship Class Balao-class Submarine Hull Number SS-398 Builder Name Portsmouth Naval Shipyard, Kittery, Maine, United States Laid Down 14 Oct 1943 Launched 5 Feb 1944 Commissioned 9 May 1944 Decommissioned 1 Aug 1970 Sunk 8 Aug 1970 Displacement 1,550 tons standard; 2,429 tons submerged Length 311 feet Beam 27 feet Draft 17 feet Machinery Four Fairbanks-Morse Model 38D8-? diesel engines (5,400shp), four high-speed Elliott electric motors (2,740shp), 4 126-cell Sargo batteries Speed 20 knots Range 11,000nm at 10 knots surfaced, 48 hours at 2 knots submerged Crew 81 Armament 6x533mm forward torpedo tubes, 4x533mm aft torpedo tubes, 24 torpedoes, 1x127mm 25cal gun Submerged Speed 8.75 knots

Contributor: C. Peter Chen

ww2dbaseCommissioned in May 1944 with Lieutenant Commander James D. Fulp, Jr., she began a brief training period at New London, Connecticut, United States on 15 Jun. Via the Panama Canal, she arrived at Pearl Harbor, Hawaii, United States for further training. Her first war patrol yielded no action, but her subsequent three war patrols had been fruitful. Her fifth war patrol began in the Sea of Okhotsk off the Kurile Islands shortly before the end of the Pacific War. On 29 Aug, she made contact with Japanese submarine I-401 by radar; the two commanding officers agreed for an American crew to board the Japanese submarine, and Segundo escorted I-401 to Sagami Wan southwest of Tokyo Bay, Japan, arriving on 31 Aug. After the war, she returned to the United States in Oct 1945. In 1946, she made a three-month cruise to Australia and China. In 1948, she made a four-month cruise to China. During the Korean War, she served off Korea between Jul and Sep 1950. In 1951, she was modernized at the San Francisco Naval Shipyard, California, United States, then was assigned to the US 7th Fleet for operations off Korea. Between 1953 and 1970, she operated along the west coast of the United States, making frequent trips to the western Pacific Ocean areas. She was found unfit for further service by the Survey Board in Jul 1970, and was decommissioned in the following month. She was sunk by submarine Salmon on 8 Aug 1970 as a target.

ww2dbaseSource: Wikipedia

Last Major Revision: Jul 2011

Submarine Segundo (SS-398) Interactive Map

Segundo Operational Timeline

Photographs

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