OK explain to me (THICKO and no connection with current practises at LHR)
The advances in Ground Movement Radar have had no effect in low vis movements ?
Planes can land and take off in low vis - since Trident days. What is the issue ?
It seems that a little bit of fog stuffs LHR.
I understand safey margins, but it does seem that safety margins are taken to the extreme to perhaps further employment safety.