ULTRA monitored the movements of air units. On the nights of June 7–8, the bomber and anti-shipping aircraft managed to fly 100 sorties, while the day forces flew 500 on the 8 June—400 by single-engine fighters. Losses were heavy. On 8 June, Luftflotte 3 lost 68 aircraft. In the first week of operations 362 aircraft were lost. In the second week, another 232 aircraft were destroyed. Thus, in the two weeks from 6–19 June, they lost nearly 75 percent of the aircraft that "Luftflotte" 3 had possessed on 5 June. From 6–30 June the Germans had lost 1,181 aircraft in 13,829 sorties. Of those sorties flown, 9,471 were fighter intercept missions.