An aircraft maintains an indicated altitude of 5,500 ft from A (elevation 1,050 ft AMSL, QNH 968 hPa) to B (elevation 650 ft AMSL, QNH 1016 hPa), with its altimeter setting unchanged at 968 hPa. Assuming an approximately ISA air column and using 30 ft per hPa for this exercise, what is its estimated height above the surface at B? - ATPL Question Bank In English