SC-497-class submarine chaser

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USS SC-661.jpg
USS SC-661
Class overview
Preceded by: Protoytpe submarine chaser USS SC-453
Succeeded by: SC-1466 class submarine chaser
Built: 1941-1944
Planned: 475
Completed: 438
Cancelled: 37
Active: 0
Lost: 17
Preserved: 1
General characteristics
Type: Submarine chaser
Displacement: 98 tons
Length: 110 ft 10 in (34 m)
Beam: 17 ft 11.5 in (5 m)
Draft: 10 ft 10 in (3 m)
  • 2 × 1,540 or 880 hp diesel engines
  • 2 × shafts
Speed: 15.6 or 21 knots
Complement: 3 Officers, 25 Enlisted
Armament: Varies over time
Armor: Wooden hull

The SC-497 class submarine chasers were a class of 438 submarine chasers built primarily for the United States Navy from 1941-1944.[1] The SC-497s were based on the experimental submarine chaser, USS SC-453. Production began in 1941 and continued until they were succeeded by the SC-1466 class submarine chaser in 1944.


The SC-497s were off-shore patrol and anti-submarine warfare vessels. Seventy of the SC-497s were converted into patrol control crafts (SCC), 18 were converted into coastal mine sweepers (AMC), and 8 were converted into patrol gunboats, motor (PGM).[2]

Sixteen SC-497s were lost and another one was lost after her conversion into a PGM-1 class motor gunboat.[2][3]

Despite the large number of SC-497s, none are credited with destroying an enemy ship. (USS SC-669 is sometimes incorrectly credited with sinking the Japanese submarine RO-107 on 29 May 1943,[2] but RO-107 was still active on 6 July 1943.[4])

During World War II, 142 SC-497 class submarine chasers were lent to allies of the United States as part of the Lend-Lease program. Seventy-eight were sent to the Soviet Union, 50 to France, 8 to Brazil, 3 to Norway, and 3 to Mexico.[2][1]


The HNoMS Hitra (ex-USS SC-718) is preserved at the Royal Norwegian Navy Museum. Some remains of HNoMS Hessa (ex-USS SC-683) and HNoMS Vigra (ex-USS SC-1061) can be seen near the coast of Sweden.

See also[edit]


  1. ^ a b Submarine Chaser (SC) Index, retrieved 21 March 2009 
  2. ^ a b c d Information on WWII SCs, retrieved 21 March 2009 
  3. ^ Submarine chasers: SC-497 class, retrieved 21 March 2009 
  4. ^ HIJMS Submarine RO-107: Tabular Record of Movement, retrieved 21 March 2009