In 1964, while operating as an aircraft ferry, Card was sunk with explosives planted by two Viet Cong commandos in the Harbor of Saigon, South Vietnam.

[3] Card had capacity for up to 24 fighter and anti-submarine aircraft, normally a mixture of Grumman Wildcats and Avengers, with composition dependent upon mission.

Departing San Diego, California on 18 January 1943, Card arrived at Hampton Roads, Virginia on 1 February for training in the Chesapeake Bay.

[5] During this crossing, Card and her escorting destroyers provided daily anti-submarine patrols against U-boats by air and by sea while remaining close to the convoy.

[7] They became increasingly effective with the development of improved anti-submarine weapons including Mark 24 (FIDO) homing torpedoes and Hedgehog forward-throwing depth charges.

L. Sterns spotted three submarines, U-264, U-422, and U-455, refueling from the Type XIV supply and replenishment ("Milchkuh") U-460, on 4 October, north of the Azores.

[3][15] On 31 October, three of her Avenger aircraft sank U-584, at 49°14′N 31°55′W / 49.233°N 31.917°W / 49.233; -31.917, 580 nmi (1,070 km; 670 mi) north of Flores Island, with FIDOs and attacked U-91 (1941), at the same location, but this boat escaped undamaged.

Too badly damaged to be saved, Borie had to be sunk by a 500 lb (227 kg) bomb dropped by one of Card's Avengers at 50°12′N 30°48′W / 50.200°N 30.800°W / 50.200; -30.800, 1,000 nmi (1,900 km; 1,200 mi) east of Cape Race, Newfoundland.

[3] Card and her escort Decatur were attacked by U-415 and one of her Wildcats spotted the blockade runner Osorno steaming for the Gironde estuary.

The escort Leary, was sunk by the combined efforts of U-275 and U-382 at 45°00′N 22°00′W / 45.000°N 22.000°W / 45.000; -22.000, 585 nmi (1,083 km; 673 mi) west northwest of Cape Finisterre, Spain.

Thirty survivors, including the mortally wounded commanding officer of the submarine, were taken on board Card and put ashore at Boston, Massachusetts, the next day.

She sortied 18 September as the flagship of TG 22.2 for patrol off the Azores, during which she cooperated with British Escort Group 9 to attack a submarine on 12 October.

She ferried men and aircraft to Guantanamo Bay, 21–24 June, then transited the Panama Canal, to transport materiel to Pearl Harbor and Guam, returning to San Diego, 14 August.

[18] Assigned to "Magic Carpet" duty, she made two voyages to Pearl Harbor, and one to the western Pacific, from 21 August to 16 December, returning servicemen to the west coast.

On 15 December 1961, Card left Quonset Point Naval Air Station in Rhode Island, with a cargo of H-21 Shawnee helicopters and soldiers from Fort Devens, bound for Vietnam.

At Subic Bay, in the Philippines, the cargo and troops were transferred to the helicopter carrier Princeton, which arrived and unloaded off the coast of Da Nang, on 25 January 1962.

[21] On 2 May 1964, while Card was moored dockside in Saigon, a Viet Cong frogman planted an explosive charge that blew a hole in the hull, killing five crewmen.