The clear differences between mean sea level pressure (QNH), airfield elevation pressure (QFE), and standard pressure (QNE).
Q-codes standardize barometric altimeter datums across international aviation operations.
QNH calibrates the altimeter to mean sea level; on the ground it reads surveyed airfield elevation.
QFE calibrates the altimeter to airfield field pressure; on the ground it reads zero feet height.
QNE represents standard pressure altitude referenced to 29.92 inHg / 1013.2 hPa.
Este artigo faz parte da biblioteca educacional FOX SIM e destina-se a fins de estudo e simulação de voo. Para operações aeronáuticas reais, consulte sempre as publicações oficiais (AIP, ROTAER, NOTAM) e manuais aprovados da aeronave.