Over the next hour the two scrambled F-16s attempted nine separate interceptions of the targets. On three occasions they managed to obtain a radar lock for a few seconds but each time the targets changed position and speed so rapidly that the lock was broken. During
the first radar lock, the target accelerated from 150mph to over 1,100mph while changing altitude from 9,000ft to 5,000ft, then up to 11,000ft before descending to almost ground level – the first descent of more than 3,000 feet taking less than two seconds. Similar manoeuvres were observed during both subsequent radar locks. On no occasion were the F-16 pilots able to make visual contact with the targets and at no point, despite the speeds involved, was there any indication of a
sonic boom.
During this time, ground witnesses broadly corroborate the information obtained by radar. They described seeing the smaller triangle completely disappear from sight at one point, while the larger triangle moved upwards very rapidly as the F-16s flew past. After 00:30 radar contact became much more sporadic and the final confirmed lock took place at 00:40. This final lock was once again broken by an acceleration from around 100mph to 700mph after which the radar of the F-16s and those at Glons and Semmerzake all lost contact. Following several further unconfirmed contacts the F-16s eventually returned to base shortly after 01:00.