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 ARA "Veinticinco de Mayo". 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."