Originally Posted by
HEATHROW DIRECTOR
I worked in ATC for most of my life and only recall a couple of occasions when contact was lost with an aircraft; maybe it's worse nowadays? Point is, when accountants are asked for money they ask how much the service will be used. In my experience, not a lot!
It's pretty common, usually have to round up someone on guard a couple of times a week. It's normally only a matter of a few minutes rather than full on prolonged loss of communication (PLOC).