hi folks,
the question below is one i came across when googling for a diagram that explains qnh and it's wrecking my head!
could anyone explain the answer in simple terms as i've totally blocked out on it.
thanks in advance.
k
"A plane leaves an aerodrome "A" which is 500' above sea level with a qnh of 990 mb and flies to another aerodrome "B" which is 200 ft above sea level with a QNH Of 1010. Assuming the pilot doesnt recalibrate altimeter from QNH at aerodrome "A" and maintains a height of 500 feet after leaving aerodrome "A" what is his actual height above runway level of airport B ? Whats his height above mean sea lever ?