The USS Perdido (CVE-47) (previously AVG-47, later ACV-47) was a Bogue-class escort carrier laid down as ACV-47 under Maritime Commission contract by Seattle-Tacoma Shipbuilding of Tacoma, Washington, 1 February 1943; launched 16 June 1943; sponsored by Mrs. H. M. Bemis, reclassified as CVE-47 on 15 July 1943; and completed at the Commercial Iron Works, Portland, Oregon.

Assigned to the United Kingdom under lend lease 23 June 1943, Perdido was taken over by the Royal Navy at Portland, 31 January 1944.

She was sold to William B. St. John, delivered to her purchaser 6 March 1947 and pressed into merchant service as Greystroke Castle (renamed Gallic in 1954 and Berinnes in 1959).

These ships were all larger and had a greater aircraft capacity than all the preceding American built escort carriers.

[1] Propulsion was provided a steam turbine, two boilers connected to one shaft giving 9,350 brake horsepower (SHP), which could propel the ship at 16.5 knots (30.6 km/h; 19.0 mph).