At departure, why would a pilot need to know the pressure altitude instead of just setting altimeter to the current altimeter setting for the airport? - Quora
How Two Pilots Got An ATC Low Altitude Alert From A Bad Altimeter Setting | Boldmethod
altimeter - When calculating takeoff performance why include airport elevation in pressure altitude? - Aviation Stack Exchange
What is the effect of switching between QNE and QNH altimeter settings? | Essential Pilot