Re: Regional Pressures
Regional QNH is still valuable for military low level let downs and fighter control type ops. It is used extensively within/below the North Sea MDAs where the nearest airfield can be 200+nm away. CM, find me an airfield off the West coast of Scotland where one can obtain an accurate QNH. Finally, if military pilots were to float around on airfield QNH at 420kts, in some areas they would spend their whole sortie tuning into various ATC agencies trying to ascertain the nearest correct pressure setting.
I understand RPS it is also extensively used by the oil industry helicopters.
QFE vs QNH, well there's always going to be 2 schools of thought. As an air taffic controller, I wish that we only used one pressure setting. As a Pilot, I don't care, as long as I remember which one I am using! It is not a difficult concept to grasp.