# Auk-class minesweeper

The Auk class were a class of minesweepers serving with the United States Navy and the Royal Navy during World War II. In total, there were 93 Auks built.

## Design and development

Prior to the United States entering World War II, they had produced two ships of the Raven-class minesweeper for testing and evaluation. From these two examples it was decided that the use of diesel-electric engines to power the ship and the minesweeping equipment, rather than separate geared diesel engines to propel the ship and diesel generators to energize the minesweeping equipment, would work better. The Royal Navy placed an order for 32 of these minesweepers from the United States, BAM-1 - BAM-32. Because of the additional equipment, the displacement was raised from 810 long tons (820 t) on the Ravens, to 890 long tons (900 t) on what would come to be known as the Auk class in the USN, and the Catherine class in the RN.
The Auk class displaced 890 long tons, with a length of 221 ft 1 in (67.39 m), a beam of 32 ft 2 in (9.80 m), and a draft of 10 ft 9 in (3.28 m). They had a maximum speed of 18.1 kn (33.5 km/h; 20.8 mph). The Auks armament varied. All were equipped with a single 3-inch (76 mm) gun on the bow, but many had their aft 3-inch gun removed or replaced by two 40 mm (1.57 in) Bofors guns. Originally designed with four 20 mm (0.79 in) Oerlikon cannons, some ships mounted as many as eight.
Five manufacturers provided the diesel-electric engines used in the class. These included the Cleveland Diesel Engine Division of General Motors, Cooper Bessemer, Baldwin Locomotive Works, the American Locomotive Company (ALCO), and Busch-Sulzer.
Twenty of the original 32 ships ordered by the Royal Navy were delivered, with an additional two coming from the USN program. They were given "J" pennant number prefixes. Of these twenty-two, three were sunk in action and 19 were returned to the US after the war.
Eleven minesweepers of the Auk class were lost in World War II, six to direct enemy action including USS Skill, torpedoed by U-593.

## Construction

The ships were constructed in 11 different shipyards, by 10 different companies, in 9 different states.
* American Ship Building Company, Lorain, Ohio
* American Ship Building Company, Cleveland, Ohio
* Associated Shipbuilders, Puget Sound, Washington
* Defoe Shipbuilding Company, Bay City, Michigan
* General Engineering & Dry Dock Company, Alameda, California
* Gulf Shipbuilding, Madisonville, Louisiana
* John H. Mathis & Company, Camden, New Jersey
* Norfolk Navy Yard, Norfolk, Virginia
* Pennsylvania Shipyards, Inc., Beaumont, Texas
* Savannah Machine & Foundry, Savannah, Georgia
* Winslow Marine Railway and Shipbuilding Company, Puget Sound, Washington

## List of ships
### Royal Navy Catherine-class minesweepers

| Ship name | Pennent number | Transfer date | Builder | Ship power | Notes |
| HMS Catherine (J12) ex-BAM-9 | J12 | 7 September 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, in 1946, sold to Turkey, in January 1947, and renamed Erdemli, stricken 1963 |
| Cato ex-BAM-10 | J16 | 7 September 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Sunk, 6 July 1944, by German Neger human torpedo |
| Chamois ex-BAM-12 | J28 | 22 October 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Damaged by mine, 21 July 1944, returned to US custody 10 December 1946, sold in 1948, and renamed Morning Star, scrapped 1960 |
| Chance ex-BAM-13 | J340 | 13 November 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 1946, sold to Turkey, 1947, renamed Edremit, stricken 1973 |
| Combatant ex-BAM-14 | J341 | 22 November 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 15 December 1946, sold to Greece 1947, sold to P. Kondyliotis of Piraeus, in July 1953, and renamed Panagyros, later renamed Diamanto, in August 1964, and Sophia Saranti in October 1969, sold to Ferlosa Maritime under Panamanian registry |
| Cynthia ex-BAM-15 | J345 | 7 December 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 20 January 1947, scrapped 1947 |
| Elfreda ex-BAM-16 ex-USS Overseer (AM-321) | J402 | 22 December 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Returned to US, 30 June 1947, sold to Turkey, 3 November 1947, renamed Çesme, stricken 1974 |
| Fairy ex-BAM-25 | J403 | 24 March 1944 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 13 December 1946, scrapped 1947 |
| Florizel ex-BAM-26 | J404 | 14 April 1944 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, December 1946, sold to Greece 1947, and renamed Aida, converted to a cargo ship in 1952, sold in 1959, and renamed Lasithi, scrapped in 1967, at Messina |
| Foam ex-BAM-27 | J405 | 28 April 1944 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 13 November 1946, scrapped 1947 |
| Frolic ex-BAM-28 | J406 | 18 May 1944 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, January 1947, sold to Turkey, 1947, renamed Çandarli, became survey ship in 1960s, stricken 1986 |
| Gazelle ex-BAM-17 | J342 | 28 July 1943 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, December 1946 |
| Gorgon ex-BAM-18 | J346 | 28 August 1943 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, December 1946, sold to Greece, registered as merchant ship by S. Sofianos of Piraeus, in 1953, renamed Gorgona, scrapped September 1953, at Perama |
| Grecian ex-BAM-19 | J352 | 22 September 1943 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US custody at England, in 1946, sold to Turkey, 1947, renamed Edincik, stricken 1974 |
| Jasper ex-BAM-29 ex-Garnet | J407 | 12 August 1944 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US custody at England, 24 December 1946, sold to Foustinos Brothers. 1947, rebuilt as inter-island ferry and renamed Pantelis, Laid up 1968, capsized and sank at moorings at Ambelakia, Salamis Island, 6 December 1971, later broken up in situ |
| Magic ex-BAM-20 | J400 | 25 October 1943 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Sunk, 6 July 1944, by German Neger human torpedo |
| Pique ex-BAM-11 ex-Celerity | J23 | 30 August 1943 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 1946, sold to Turkey, 1947, renamed Ereğli |
| Pylades ex-BAM-21 | J401 | 24 November 1943 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Sunk, 8 July 1944, by German Biber midget submarine |
| Steadfast ex-BAM-31 | J375 | 29 September 1943 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, 24 December 1946, sold to Turkey, 1947, renamed Eregli, stricken 1973 |
| Strenuous ex-USS Vital (AM-129) | J335 | 18 May 1943 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Returned to US, 10 December 1946, sold, 23 April 1947, renamed Evening Star, renamed Pride of the West, broken up in Germany, July 1956 |
| Tattoo ex-BAM-32 | J374 | 26 October 1943 | Gulf Shipbuilding, Chickasaw, Alabama | 2 × 1,710 shp (1,280 kW) Cooper Bessemer GSB-8, National Supply Company single reduction gear | Returned to US, January 1947, sold to Turkey, 1947, renamed Çarsamba, stricken 1985 |
| Tourmaline ex-USS Usage (AM-130) | J339 | 7 June 1943 | Gulf Shipbuilding, Chickasaw, Alabama | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Returned to US, January 1947, sold to Turkey, 1947, renamed Çardak, stricken 1974 |

### US Navy Auk-class minesweepers

| Ship name | Hull number | Builder | Ship power | Notes |
| Ardent ex-HMS Buffalo BAM-8 | AM-340 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, December 1946, stricken, 1 July 1972, sold to the Mexican Navy on 19 September 1972, renamed Juan N. Álvarez |
| Auk | AM-57 | Norfolk Navy Yard, Norfolk, Virginia | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 15 July 1946, stricken, 1 August 1956 |
| Broadbill | AM-58 | Defoe Shipbuilding Company, Bay City, Michigan | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 25 January 1954, stricken, 1 July 1972, sold, 1 December 1973, renamed Anaconda |
| Champion ex-HMS Akbar BAM-1 | AM-314 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 30 January 1947, stricken 1 July 1972, transferred to the Mexican Navy, 19 September 1972, renamed Mariano Escobar, still in active service |
| Chickadee | AM-59 | Defoe Shipbuilding Company, Bay City, Michigan | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 15 May 1946, transferred to the National Navy of Uruguay, 18 August 1966, renamed Comandante Pedro Campbell, converted for Antarctic expeditions, stricken 12 December 2003, used as training hulk |
| Chief ex-HMS Alice BAM-2 | AM-315 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Grounded, 1 February 1944, decommissioned, 1 November 1954, stricken, 1 July 1972, sold to the Mexican Navy, 16 February 1973, renamed Jesus Gonzalez Ortega |
| Competent ex-HMS Amelia BAM-3 | AM-316 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 15 April 1955, sold to the Mexican Navy, 20 September 1972, renamed Ponciano Arriaga |
| Defense ex-HMS Amity BAM-4 | AM-317 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 15 April 1955, stricken, 1 July 1972, sold to the Mexican Navy, 3 January 1973, renamed Manuel Doblado |
| Devastator ex-HMS Augusta BAM-5 | AM-318 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 15 April 1955, sold to the Mexican Navy, 1973, renamed Sabastian Lerdo de Tejada |
| Dextrous ex-HMS Sepoy BAM-30 | AM-341 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 31 October 1956, transferred to the South Korean Navy, December 1967, renamed Koje |
| Gladiator ex-HMS Blaze BAM-6 | AM-319 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 15 March 1959, stricken, 1 July 1972, sold to the Mexican Navy, 19 September 1972, renamed Santos Degollado, Sunk as a dive wreck, 3 March 2022 |
| Heed | AM-100 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 27 January 1954, stricken, 1 March 1967 |
| Herald | AM-101 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 15 April 1955, stricken, 1 July 1972, sold to the Mexican Navy, 1 February 1973, renamed Mariano Matamoros |
| Impeccable ex-HMS Brutus BAM-7 | AM-320 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,988 shp (1,482 kW) Baldwin VO8, Westinghouse single reduction gear | Decommissioned, 14 October 1955, stricken, 1 July 1972, sold for scrap, 1 April 1974 |
| Minivet | AM-371 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Sunk by mine, in the Tsushima Strait, 29 December 1945, stricken, 21 January 1946 |
| Motive | AM-102 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 15 June 1946, stricken, 1 December 1966, sunk as a target, April 1968 |
| Murrelet | AM-372 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 14 March 1957, stricken, 1 December 1964, transferred to the Philippine Navy, 18 June 1965, renamed Rizal |
| Nuthatch | AM-60 | Defoe Shipbuilding Company, Bay City, Michigan | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 3 June 1946, stricken, 1 December 1966, sunk as a target |
| Oracle | AM-103 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 29 May 1946, stricken, 1 December 1966, sunk as a target 1967 |
| Peregrine | AM-373 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 31 January 1969, stricken, 1 February 1969 |
| Pheasant | AM-61 | Defoe Shipbuilding Company, Bay City, Michigan | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, December 1945, stricken, 1 December 1966, sunk as a target |
| Pigeon | AM-374 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 14 January 1955, stricken, 1 December 1966, sold for scrap, 6 October 1967 |
| Pilot | AM-104 | Pennsylvania Shipyards, Inc., Beaumont, Texas | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, October 1954, stricken, 1 July 1972, sold to the Mexican Navy, 19 July 1972, renamed Juan Aldarma |
| Pioneer | AM-105 | Pennsylvania Shipyards, Inc., Beaumont, Texas | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 8 July 1946, stricken, 1 July 1972, sold to the Mexican Navy, 19 September 1972, renamed Leandro Valle |
| Pochard | AM-375 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 3 August 1955, stricken, 1 December 1966, sold for scrap, 17 November 1967 |
| Portent | AM-106 | Pennsylvania Shipyards, Inc., Beaumont, Texas | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Sunk by mine, off Anzio, Italy, on 22 January 1944, stricken, 6 March 1944 |
| Prevail | AM-107 | Pennsylvania Shipyards, Inc., Beaumont, Texas | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 1963, stricken, 10 January 1964, sold for scrap, 13 October 1964 |
| Ptarmigan | AM-376 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 17 May 1957, stricken, 1 July 1963, transferred to South Korea, 25 July 1963, renamed Shin Song, stricken, 1984 |
| Pursuit | AM-108 | Winslow Marine Railway and Shipbuilding Company, Puget Sound, Washington | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 30 June 1960, stricken, 1 July 1960 |
| Quail | AM-377 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, April 1946, stricken, 1 December 1966 |
| Redstart | AM-378 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 15 March 1957, stricken 1 April 1965, transferred to the Taiwan Navy, 25 July 1963, renamed Wu Sheng, stricken, 26 February 1998 |
| Requisite | AM-109 | Winslow Marine Railway and Shipbuilding Company, Puget Sound, Washington | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned and stricken, 1 April 1964 |
| Revenge ex-Right | AM-110 | Winslow Marine Railway and Shipbuilding Company, Puget Sound, Washington | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 9 March 1955, stricken, 1 April 1964, Sold for scrap in May 1967 |
| Roselle | AM-379 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 20 June 1946, stricken, 1 July 1972, transferred to the Mexican Navy, 1 February 1973, renamed Melchior Ocampo, reclassified and renamed, Guitierrez Zamora |
| Ruddy | AM-380 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 31 August 1956, stricken, 17 May 1974, transferred to the Peruvian Navy, 1 November 1960, renamed Galvez, retired 1981 |
| Sage | AM-111 | Winslow Marine Railway and Shipbuilding Company, Puget Sound, Washington | 2 × 1,559 shp (1,163 kW) Busch-Sulzer 539, Westinghouse single reduction gear | Decommissioned, 19 April 1955, stricken, 1 July 1972, sold to the Mexican Navy, 4 November 1973, renamed Hermenegildo Galeana, renamed, Mariano Matomoros, 1993 |
| Scoter | AM-381 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 16 April 1947, stricken, 1 December 1966, sold to the Mexican Navy, 19 September 1962, renamed Xicotencatl |
| Seer | AM-112 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 11 March 1955, stricken, 1 March 1963, sold to the Royal Norwegian Navy, 15 December 1962, renamed Uller |
| Sentinel | AM-113 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Sunk in action, off Licata, Italy on 10 July 1943, stricken, 19 August 1943 |
| Sheldrake | AM-62 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 1 August 1968, stricken 30 June 1968, sold for scrap, 2 November 1971 |
| Shoveler | AM-382 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 28 September 1956, stricken, 17 May 1974, loaned to the Peruvian Navy, 1 November 1960, transferred to the Peruvian Navy, 1 May 1974 |
| Skill | AM-115 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Sunk in action, off Salerno, Italy, 25 September 1943, stricken, 11 November 1943 |
| Skylark | AM-63 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Sunk in action, off Hagushi beaches, near Yomitan, Okinawa, 28 April 1945, stricken, 28 April 1945 |
| Spear ex-HMS Errant BAM-22 | AM-322 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, August 1946, stricken, 1 July 1972, sold to the Mexican Navy, 19 September 1972, renamed Ignacio De La Llave |
| Speed | AM-116 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 7 June 1946, stricken, transferred to South Korea, 17 November 1965, renamed Sunchon |
| Sprig | AM-384 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, June 1954, stricken, 1 July 1972, sold for scrap, 20 December 1973 |
| Staff | AM-114 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 15 August 1955, stricken, 1 March 1967, sold for scrap, 17 November 1967 |
| Starling | AM-64 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Decommissioned, 15 May 1946, stricken, 1 July 1972, sold to the Mexican Navy, 16 February 1973, renamed Valentin Gómez Farias |
| Steady | AM-118 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 18 June 1946, stricken 18 February 1968, transferred to the Taiwan Navy, 30 May 1968, renamed Mo Ling, sunk, 1970 |
| Strive | AM-117 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 8 January 1955, stricken, 1 October 1959, sold to the Royal Norwegian Navy, renamed Gor |
| Surfbird | AM-383 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 18 December 1970, stricken, 21 February 1975, sold to a private company, 5 December 1975, renamed Helenka B |
| Sustain | AM-119 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 9 October 1954, stricken, 1 October 1959, sold to the Royal Norwegian Navy, renamed Tyr |
| Swallow | AM-65 | General Engineering & Dry Dock Company, Alameda, California | 2 × 1,559 shp (1,163 kW) ALCO 539, Westinghouse single reduction gear | Sunk in action, off Kerama Retto, in the Ryukyu Islands, on 22 April 1945, stricken, 2 June 1945 |
| Sway | AM-120 | John H. Mathis & Company, Camden, New Jersey | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 15 January 1947, stricken, 1 July 1972, sold to the Mexican Navy, renamed Ignacio Manuel Altamirano |
| Swerve | AM-121 | John H. Mathis & Company, Camden, New Jersey | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Sunk by mine, in action off Anzio, Italy, 9 June 1944, stricken, 22 August 1944 |
| Swift | AM-122 | John H. Mathis & Company, Camden, New Jersey | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 13 December 1955, stricken, 1 July 1972, scrapped |
| Symbol | AM-123 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 27 July 1956, stricken, 1 July 1972, sold to the Mexican Navy, renamed Guillermo Prieto |
| Tanager | AM-385 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 10 December 1954, transferred to the US Coast Guard, 4 October 1963, commissioned USCGC Tanager (WTR-885), 16 July 1964, decommissioned, 1 February 1972, sold, 15 November 1972 |
| Tercel | AM-386 | American Ship Building Company, Lorain, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 10 November 1954, stricken, 1 July 1972, scrapped |
| Threat | AM-124 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 31 May 1946, stricken, 1 July 1972, sold to the Mexican Navy, 1 February 1973, renamed Francisco Zarco |
| Tide | AM-125 | Savannah Machine & Foundry, Savannah, Georgia | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Sunk by mine, in action off the coast of Normandy, 7 June 1944, stricken, 29 July 1944 |
| Token | AM-126 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 16 April 1954, stricken, 1 December 1966 |
| Toucan | AM-387 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 1 May 1957, stricken 1 July 1964, transferred to the Taiwan Navy, 2 December 1964, renamed Chien Men, sunk in action, 6 August 1965 |
| Towhee | AM-388 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 30 April 1969, stricken, 1 May 1969, sold for scrap, 6 March 1970 |
| Triumph ex-HMS Espoir BAM-23 | AM-323 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 29 August 1955, stricken, 1 March 1961, transferred to the Royal Norwegian Navy, 27 January 1961, renamed Brage, scrapped, 1978 |
| Tumult | AM-127 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 21 September 1954, stricken, 1 May 1967, sold for scrap |
| Velocity | AM-128 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 7 October 1946, stricken, 1 July 1972, sold to the Mexican Navy, renamed Ignacio L. Vallarta |
| Vigilance ex-HMS Exploit BAM-24 | AM-324 | Associated Shipbuilders, Puget Sound, Washington | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 30 January 1947, stricken, 1 December 1966, transferred to the Philippine Navy, 19 August 1967, renamed Quezon |
| Waxwing | AM-389 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 1 May 1957, transferred to the Taiwan Navy, 14 October 1965, renamed Chu Yang, decommissioned 16 February 1998 |
| Wheatear | AM-390 | American Ship Building Company, Cleveland, Ohio | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Westinghouse single reduction gear | Decommissioned, 17 November 1954, stricken, 1 July 1972, sold for scrap, 20 December 1973 |
| Zeal | AM-131 | Gulf Shipbuilding, Madisonville, Louisiana | 2 × 1,766 shp (1,317 kW) Electro-Motive Division 12-278, Farrel Birmingham single reduction gear | Decommissioned, 6 July 1956, stricken, 1 December 1966, sunk as target, 9 January 1967 |