On 23 April, while en route from Ascension Island to the Falklands, Invincible mistakenly locked her Sea Dart missile system on a VARIG Brazilian Airlines DC-10 rather than on the Argentine Air Force Boeing 707 that had been monitoring the fleet's movements.[8] 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[9] 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[9] 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." Details of the Harrier interception appeared in the Brazilian press along with the claim that the DC-10's passengers were "alleged to have been frightened" and Woodward's comment that "nconvenience to passengers' underwear regretted unless any of them were Argentinian".