CM and ATG
I do not know what planet you are on, but I suggest that you read some Class "A" Airprox reports. With closing speeds of 14nm/min there was "non-sighting by crews" even though the visibility was 50kns. What chance would crews have coming off the Tain range in thick mist. This is 2013, not 1913 with "a Hun out of the sun"
DV