hi,
ok it makes a bit more sense now
thanks for explaining, i find it quite interesting..... can u recommend any sites with this sort of basic ATC info?
just another Q, if an aircraft is halfway through a transatlantic flight, say LHR to JFK, and its slap bang over the middle of the atlantic... who (if they need to) would they communicate with in that area, seeing as there arn't any airports around for a few hundred miles any direction?
cheers