TopDrop. My apologies. I should have said no other country has C over D as it's clearly " upside down" airspace .
At least in Ireland they have the C around the runway where the risk is highest..
The frequency boundaries on our charts are clearly primarily for ATC workload purposes. They very often don't reflect the range of the VHF transmitter.- look at the huge area south of Charleville that clearly has no VHF coverage to the ground at normal VFR cruise levels.
Last edited by Dick Smith; 14th Apr 2016 at 23:12.