Hi Ewan
You have been given the QNH of 1005. If the airfield is at 18ft. above sea level, would you expect the pressure to be..
a) The same as at 0ft (QNH)
b) Lower than that at sea level
c) Higher than that at sea level
Flight levels are flown at standard pressure 1013.2
If you have selected 1008 (5.2 lower), would you expect your indicated altitude to be higher or lower than 5500?
How much higher/lower given that the differential is 5.2?