later, a naval task force headed by Invincible and Hermes left HMNB Portsmouth bound for the South Atlantic. On 20 April, the UK government formally ordered its defence forces to bring the islands back under British control. Along with eight Sea Harriers, Invincibles air group included twelve Sea King helicopters that were slightly larger than the ship had originally been designed to accommodate. Small machine guns were added around the flight deck and island for close-in defence. On 23 April, while en route from Ascension Island to the Falklands, Invincible mistakenly locked her Sea Darts on a VARIG Brazilian Airlines DC-10 rather than on the Argentine Air Force Boeing 707 that had been monitoring the fleet's movements. The previous day, Task Group Commander Rear Admiral Sandy Woodward had sought permission from Commander-in-Chief Admiral Sir John Fieldhouse to shoot down the 707 as he believed its activity indicated a raid would be launched from the Argentine aircraft carrier . As the 707 would be no direct threat to the fleet, Woodward ordered Weapons Tight and the continued tracking of the aircraft's course while a Sea Harrier was dispatched to investigate. The Harrier pilot reported that "it was a Brazilian airliner, with all the normal navigation and running lights on." On 30 May, two Dassault-Breguet Super Étendards, one carrying Argentina's last remaining air-launched Exocet, accompanied by four A-4C Skyhawks each with two bombs, took off to attack Invincible. Argentine intelligence had sought to determine the position of the carriers from analysis of aircraft flight routes from the task force to the islands. However, the British had a standing order that all aircraft conduct a low level transit when leaving or returning to the carriers to disguise their position. This tactic compromised the Argentine attack, which focused on a group of escorts 40 miles south of the main body of ships. When one of the Super Étendards detected a large target on radar, the Exocet was launched, and the Super Étendards turned for Argentina, while the Skyhawks followed the Exocet, which soon passed out of sight. Two of the attacking Skyhawks were shot down by Sea Darts fired by , with HMS Avenger claiming to have shot down the missile with her 4.5" gun (although this claim is disputed). No damage was caused to any British vessels. During the war, Argentina claimed to have damaged the ship and continues to do so to