MV Empire MacKay was an oil tanker constructed with rudimentary aircraft handling facilities as a merchant aircraft carrier (MAC ship).

MV Empire MacKay was built by Harland & Wolff, Govan under order from the Ministry of War Transport.

She entered service as a MAC ship in October 1943, however only her air crew and the necessary maintenance staff were naval personnel.

[2] She was operated by the British Tanker Company.

[3] She returned to merchant service as an oil tanker in 1946 as British Swordfish and she was eventually scrapped in Rotterdam in 1959.