RFA Sir Galahad (L3005) was a landing ship logistics (LSL) of the Royal Fleet Auxiliary, later in service with the Brazilian Navy as the Garcia D'Avila.

Sir Galahad was ordered on 6 September 1984 to a design by the shipbuilder Swan Hunter, as a replacement for the landing ship of the same name that had been sunk in the 1982 Falklands War.

The ship was powered by two Mirrlees Blackstone K9 Major diesel engines, rated at a total of 13,320 bhp (9,930 kW) which drove two propeller shafts, giving a speed of 18 kn (21 mph; 33 km/h).

Built as a combined landing craft and ferry with two flight decks for helicopters and bow and stern doors, there was capacity for around 400 troops and 3,440 tonnes of supplies.

[1] On 20 February 2024, the Brazilian Navy announced the former RFA Sir Galahad will be used to conduct SINKEX as a target for two helicopter-launched Penguin MK2 MOD7 missiles and a submarine-launched Mk48 torpedo.