List of Tench-class submarines

List of Tench-class submarines and their dispositions. 29 of these boats were built during and after World War II, commissioned from October 1944 through February 1951, with 11 commissioned postwar.Bauer and Roberts, pp. 280-282This includes , commissioned on 13 August 1945, the day hostilities ceased, as postwar. None of this class were lost in World War II. Ghazi (ex-Diablo (SS-479)) was lost in Pakistani service on 4 December 1971 during the Indo-Pakistani Naval War of 1971, sank by INS Rajput. Some of the class served actively in the US Navy through the middle 1970s, others served into the 1990s with foreign navies, and one (Hai Shih ex-) is still active in Taiwan's Republic of China Navy.

The primary improvement of the Tench and Balao classes over the preceding Gato class was an increase in test depth from to . This, combined with less wartime service than previous classes, led to these classes being preferred for modernization programs and active postwar service. 16 Tenches were modernized under various GUPPY conversion programs, plus 8 received the more austere "Fleet Snorkel" modernization.GUPPY and other diesel boat conversions page

Cancellations A total of 125 U.S. submarines were cancelled during World War II, all but three between 29 July 1944 and 12 August 1945. The exceptions were , , and , cancelled 7 January 1946. References vary considerably as to how many of these were Balaos and how many were Tenches. Some references simply assume all submarines numbered after SS-416 were Tench class; however, and were completed as Balaos.Silverstone, pp. 203-204Gardiner and Chesneau, pp. 145-147 This yields 10 cancelled Balao-class, SS-353-360 and 379-380. The Register of Ships of the U. S. Navy differs, considering every submarine not specifically ordered as a Tench to be a Balao, and further projecting SS-551-562 as a future class. This yields 62 cancelled Balao class, 51 cancelled Tench class, and 12 cancelled SS-551 class. This article follows the information in the "Register". Two of the cancelled Balao-class submarines, and , were launched incomplete and served for years as experimental hulks at Annapolis and Norfolk, Virginia. Two of the cancelled Tench-class boats, and , were also launched incomplete, never commissioned, but listed with the Reserve fleet until struck in 1958 and scrapped in 1959. The cancelled hull numbers, including those launched incomplete, were SS-353-360 (Balao), 379–380 (Balao), 427–434 (Balao), 436–437 (Tench), 438–474 (Balao), 491–521 (Tench), 526-529 (Tench), 530–536 (Balao), 537-550 (Tench), and 551-562 (SS-551 class).

Abbreviations Abbreviations and hull classification symbols for postwar redesignations/conversions: AGSS — auxiliary submarine (various roles including sonar testing and some pierside trainers) FS — "fleet snorkel" conversion, including a snorkel and streamlined sail G IA, G II, etc. — various GUPPY conversions, usually including a snorkel, streamlined sail, improved batteries, and upgraded sonar and electronics IXSS — unclassified submarine PT — pierside trainer for naval reservists, reportedly immobilized by removing the propellersThese were in commission but classed as "in commission, in reserve", thus some were decommissioned and recommissioned on the same day to reflect the change in statusFriedman 1995, p. 285 SSR — radar picket submarine Struck — Struck (deleted) from the Naval Vessel Register, usually followed by scrapping or other final disposal, or sale to a foreign navy

Ships in class + Construction data Ship Name Builder Laid down Launched / Fate SS-417Portsmouth Naval Shipyard, Kittery, Maine1 Apr 19447 Jul 19446 Oct 1944January 1947G IA 1951, AGSS 1 Oct 1969, SS 30 Jun 1971; struck 15 Aug 1973, sold to Peru for spares 16 Sep 1976Friedman 1995, p. 302October 19508 May 1970 SS-4185 Apr 194413 Oct 19446 Apr 1946G IIA 1953; transferred to Turkey as Uluçalireis 1 Jul 1971; struck and sold to Turkey 1 Aug 1973, decommissioned 7 Aug 2000, memorial at the Rahmi M. Koç Museum in Istanbul, TurkeyThornback (SS-418) at NavSource2 Oct 19531 Jul 1971 SS-4198 May 194420 Jul 194425 Oct 194430 Mar 1946SSR 5 Apr 1948, SS 1 Mar 1961, AGSS (sonar test boat) 1 Dec 1963; struck 27 Jun 1975, sunk as target 25 Oct 1976Tigrone (SS-419) at NavSource1 Nov 19481 Nov 195710 Mar 196227 Jun 1975 SS-42028 Apr 19449 Aug 19446 Nov 194420 Jul 1946G IIA 1953; struck 1 Oct 1973, sold for scrap 21 Mar 197426 Nov 19521 Oct 1973 SS-42122 May 194418 Aug 194416 Nov 1944March 1946G IIA 1953; struck and sold to Turkey as Cerbe 1 Jul 1972; decommissioned 23 Jul 1999, sold for scrap on unknown dateTrutta (SS-421) at NavSource1 Mar 195114 May 19522 Jan 19531 Jul 1972 SS-42227 May 194423 Aug 19448 Dec 19442 Feb 1946AGSS 1 Jul 1962; struck 1 Apr 1963, sold for scrap April 196513 May 194711 Mar 1963 SS-4237 Jun 19446 Sep 194416 Dec 19444 Mar 1968FS 1952, AGSS 1 May 1968, PT 1968-1971, IXSS 30 Jun 1971; struck 15 Dec 1971, memorial in Baltimore, MarylandTorsk (SS-423) at NavSource4 Mar 196815 Dec 1971 SS-42427 Jun 19441 Oct 194429 Dec 1944April 1952G IIA 1953; struck 23 Mar 1973, sold for scrap 21 Mar 197427 Feb 195323 Mar 1973 SS-435Electric Boat Company, Groton, Connecticut1 Mar 19453 May 19468 Nov 19461 Feb 1963AGSS 1 Apr 1960; struck 1 Feb 1963, sold for scrap 21 Oct 1963Friedman 1995, p. 303Corsair (SS-435) at NavSource SS-43621 Jun 19451 Aug 1946rowspan=2 rowspan=2 Cancelled 7 Jan 1946, suspended 30 Jan 1946, reinstated 26 Feb 1946, accepted but never commissioned 3 Sep 1946, placed in reserve fleet; struck 9 Jun 1958, sold for scrap 10 Jul 1959Unicorn (SS-436) at NavSource SS-43720 Sep 1946Cancelled 7 Jan 1946, suspended 30 Jan 1946, reinstated 26 Feb 1946, accepted but never commissioned 2 Oct 1946, placed in reserve fleet; struck 9 Jun 1958, sold for scrap 7 Oct 1959Walrus (SS-437) at NavSource SS-475Portsmouth Naval Shipyard, Kittery, Maine28 Jun 19441 Oct 194415 Jan 19452 Dec 1968FS 1952; struck and sold to Canada as Rainbow 2 Dec 1968; decommissioned by Canada 31 Dec 1974, sold for scrap 24 Mar 1977Argonaut (SS-475) at NavSource SS-47610 Jul 194517 Oct 19446 Feb 194529 Jun 1970FS 1952, AGSS 1 Feb 1969, PT 1970-1971, IXSS 30 Jun 1971; struck 15 Dec 1971, sold for scrap 19 Jun 197329 Jun 197015 Dec 1971 SS-47711 Jul 194414 Feb 194529 Jul 1963AGSS 9 Mar 1962; struck 1 Aug 1963, sold for scrap 9 Jul 1964 SS-47822 Jul 19445 Nov 194417 Mar 194512 Apr 1973G II 1948; struck and sold to Taiwan as Hai Shih 12 Apr 1973, reportedly still in serviceCutlass (SS-478) at NavSource SS-47911 Aug 19441 Dec 194431 Mar 19451 Jun 1964AGSS 19 Jul 1962, FS 1964; struck and transferred to Pakistan as Ghazi 1 Jun 1964, sank by INS Rajput on 4 Dec 1971Diablo (SS-479) at NavSource SS-48021 Aug 194415 Dec 194414 Apr 19451 Aug 1970FS 1952, AGSS 1 May 1967, SS 1 Oct 1969; struck 1 Aug 1970, sold for scrap 13 Jun 1972 SS-48124 Aug 19441 Jan 194528 Apr 19452 Dec 1968Radar picket 1946, redesignated as SSR 20 Jan 1948, SS 15 Aug 1959, AGSS 29 Jun 1968, PT 1969-1971, IXSS 30 Jun 1971; struck 20 Dec 1971, memorial in Pittsburgh, PAUSS Requin website at Carnegie Science Center2 Dec 196820 Dec 1971 SS-4822 Oct 194426 Jan 194514 May 194517 Nov 1969Prototype FS 1947, AGSS 30 Jun 1969; struck 17 Nov 1969, sold for scrap 13 Sep 1971 SS-4837 Nov 19442 Mar 194511 Jun 194527 Mar 1973G II 1949; struck and sold to Brazil as Bahia 27 Mar 1973; decommissioned and scrapped 1998Sea Leopard (SS-483) at NavSource SS-4844 Dec 194410 Apr 194511 Jul 19458 Jul 1972G I 1947, G II 1951; struck and sold to Brazil as Rio de Janeiro 8 Jul 1972; decommissioned 16 Nov 1978, sold for scrap 18 Jun 1981Odax (SS-484) at NavSource SS-4853 Jan 194511 May 194513 Aug 19451 Jun 1972G II 1949; struck 1 Jun 1972, sold for scrap 2 May 1973Sirago (SS-485) at NavSource SS-48629 Jan 194512 Jun 194511 Sep 19451 Apr 1955G I 1947, G II 1951; struck 1 Aug 1970, sold for scrap 26 Jan 19722 Jul 19551 Aug 1970 SS-4875 Mar 194512 Jul 19453 Jan 194629 Oct 1973G II 1947, G III 1962; struck and sold to Greece as Katsonis 29 Oct 1973; decommissioned 30 Mar 1993, sold for scrap on unknown dateRemora (SS-487) at NavSource SS-48812 Apr 194524 Aug 194519 Apr 19461 Jun 1964AGSS 19 Jul 1962; struck 1 Jun 1964, sold for scrap 14 May 1965 SS-48914 May 194520 Nov 194520 Sep 194611 Oct 1969Completed as radar picket, redesignated as SSR 20 Jan 1948, SS 15 Aug 1959, AGSS 30 Jun 1969; struck 11 Oct 1969, sold for scrap 13 Jun 1972 SS-49015 Jun 194521 May 19481 Oct 194818 Aug 1972Suspended 30 Jan 1946, completed as G II 1948, G III 1963; transferred to Italy as Gianfranco Gazzana Priaroggia 18 Aug 1972, struck and sold to Italy 5 Dec 1977; struck by Italy 31 May 1981, fate unknownVolador (SS-490) at NavSource SS-49116 Jul 1945rowspan=9 rowspan=9 rowspan=9 Cancelled 12 Aug 1945, broken up on slip SS-492rowspan=4 Cancelled 12 Aug 1945 SS-493 SS-494 scope="row" SS-515Cancelled 29 Jul 1944 SS-516Mare Island Naval Shipyard, Vallejo, California15 May 1944Cancelled 7 Jan 1946, broken up on slip scope="row" SS-51729 Jun 1944Cancelled 29 Jul 1944, broken up on slipFriedman 1995, p. 304 SS-518rowspan=2 Cancelled 29 Jul 1944 scope="row" SS-521 SS-522Boston Naval Shipyard, Charlestown, Massachusetts8 Feb 194415 Dec 19444 Mar 194617 Oct 1973G II 1947; struck and sold to Brazil as Ceará 17 Oct 1973, fate unknownAmberjack (SS-522) at NavSource SS-52326 Oct 194913 May 1972Suspended 17 Jan 1946, completed as G II; struck and sold to Brazil as Rio Grande do Sul 13 May 1972, sold for scrap 18 Jun 1981Grampus (SS-523) at NavSource SS-5244 Apr 194918 Aug 1972Suspended 17 Jan 1946, completed as G II, G III 1962; struck and transferred to Italy as Primo Longobordo 18 Aug 1972, sold to Italy 5 Dec 1977; decommissioned by Italy 31 Jan 1980, sold for scrap 31 May 1981Pickerel (SS-524) at NavSource SS-52510 Feb 195115 May 1973Suspended 17 Jan 1946, completed as G II; struck and sold to Venezuela as Picua 15 May 1973; decommissioned by Venezuela 16 Nov 1978, struck 1 Jan 1980, sold for scrap 18 Jun 1981Grenadier (SS-525) at NavSource SS-526rowspan=7 rowspan=7 rowspan=7 rowspan=7 Cancelled 29 Jul 1944 SS-527 SS-528 SS-529 scope="row" SS-544 scope="row" SS-547Electric Boat Company, Groton, ConnecticutCancelled 28 Mar 1945 scope="row" SS-550Portsmouth Naval Shipyard, Kittery, MaineCancelled 27 Mar 1945

See also List of Gato-class submarines List of Balao-class submarines

References

List of Tench-class submarines

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