Atlantic Conveyor was a British Merchant Navy container ship, registered in Liverpool, that was requisitioned by the Ministry of Defence during the Falklands War. She was struck on 25 May 1982 by two Argentine air-launched AM39 Exocet missiles, killing 12 sailors. The ship sank under tow on 28 May, becoming the first British merchant vessel lost to enemy action since the Second World War.

The wrecksite is designated under the Protection of Military Remains Act 1986.

Atlantic Conveyor was a 14,950 ton roll-on, roll-off container ship owned by Cunard. She was built along with six other container ships, each named with the prefix Atlantic, and each sailing under different national flags by different companies for the Atlantic Container Line consortium.

Along with her sister ship, Atlantic Causeway, Atlantic Conveyor was requisitioned by the Ministry of Defence at the beginning of the Falklands War through the STUFT (ship taken up from trade) system. Because of the short time available, the decision that the ship was not "a high-value unit", and a controversy over whether arming auxiliaries was legal, Atlantic Conveyor was not fitted with either an active or a passive defence system.

The ships were used to carry supplies for the Royal Navy Task Force sent by the British government to retake the Falkland Islands from Argentine occupation. Sailing for Ascension Island on 25 April 1982, Atlantic Conveyor carried a cargo of six Wessex helicopters from 848 Naval Air Squadron and five RAF Chinook HC.1s from No. 18 Squadron RAF. At Ascension, she picked up eight Fleet Air Arm Sea Harriers (809 Squadron) and six RAF Harrier GR.3s.

One Chinook of B flight No. 18 Squadron RAF left Atlantic Conveyor to support operations on Ascension. With the aircraft stored she then set sail for the South Atlantic. On arrival off the Falklands in mid-May, all of the Harriers were off-loaded to the carriers; the GR.3s going to HMS Hermes while the Sea Harriers were divided amongst the existing squadrons on Hermes and HMS Invincible. With the additional aircraft on Hermes a Lynx HAS.2 helicopter was flown and parked on Atlantic Conveyor on 20 May 1982.

On 25 May 1982 (the same day as the loss of HMS Coventry) Atlantic Conveyor was hit by two AM39 Air Launched Exocet missiles fired by two Argentine Navy Super Étendard jet fighters. The mission was led by Captain Roberto Curilovic (call sign 'Tito'), flying Super Etendard 0753/3-A-203, and his wingman, Lieutenant Julio Barraza, (call sign 'Leo') flying in 0754/3-A-204 from 2da Escuadrilla Aeronaval de Caza y Ataque.

Both Exocets struck Atlantic Conveyor on the port quarter of the ship. There are conflicting accounts on whether the warheads exploded after penetrating the ship's hull, or on impact. A witness, the former Prince Andrew, reported that debris caused "splashes in the water about a quarter of a mile away". He said that the incident "was an experience I shall never forget ... horrific". All the survivors were taken to HMS Hermes.