The first USS Estero (CVE-42) (previously AVG-42 then later ACV-42) was an escort aircraft carrier launched 22 March 1943 by the Seattle-Tacoma Shipbuilding Corporation, Seattle, Washington, and sponsored by Mrs. C. N. Ingraham.

Completed in October 1943, she was transferred to the Royal Navy on 3 November 1943 and commissioned the same day as HMS Premier.

She was returned to United States custody 2 April 1946, she was stricken on 21 May 1946 and was sold into merchant service as the Rhodesia Star (later renamed Hong Kong Knight) in 1947.

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).