The first at 10.15 A.M. was carried out as an improvised assault from the first lone Argentine aircraft that appeared on the scene, piloted by Lt. Guillermo Owen Crippa flying an Aermacchi MB-339 from the Argentine Navy's 1st Naval Air Attack Squadron, who had been despatched by the Argentine High Command on a reconnaissance flight over Falkland Sound to ascertain the veracity of reports it had received from an Argentine Army post present at San Carlos of a British landing taking place there.