ALTIMETRY
QNH — Definição e Conceito
QNH is the barometric altimeter setting that calibrates the instrument to display true altitude above Mean Sea Level (MSL).
O que é QNH?
Altimeter Setting Referenced to Mean Sea Level (MSL)QNH is the barometric altimeter setting that calibrates the instrument to display true altitude above Mean Sea Level (MSL).
Explicação Técnica Completa
When QNH is set on the ground at an airport, the altimeter displays the surveyed official field elevation of the airfield.