Condign volumes 1 to 3

UAP CONTEXT 3. The key factor in eliminating or including the mirage phenomena as a potential UAP event is that of low grazing angles and long distances, since it is unlikely (from the type of UAP details usually received) that the other detailed meteorological conditions will be known. In the UKADR the combination of long path lengths and low grazing angles is more likely to occur at sea. --- 20-2