What are you talking about?
On the runway you want to see 300 feet in the altimeter so you sent local QNH, that will display the elevation of the field for takeoff in the altimeter.
As I showed you the point where the pilots would change to 2992 during climb out at 18,000 feet.
As programmers we can easily correlate the altimeter setting to the altimeter to change the display on the animation based on phase of flight.
For takeoff the pilots for 77 will set the local altimeter setting (QNH) so the altimeter displays the field elevation. It is a procedure, not a technique. As the crew climbs out they set 2992 in the altimeter to display pressure altitude above 18,000 feet so we can fly flight levels (FL) so all the planes above 18,000 have the same altimeter setting as we fly to ensure altitude separation.
We use QNH below 18,000 feet to fly, and 2992
This is not an error; it is what you would program the data to do to display the proper instrument readings seen by the pilots. Just like the yoke position has to be translated to a visual symbol of the yoke position from the number in the FDR file.
When the pilots descend they set local QNH below 18,000 feet so when they land the altimeter reads close to the field elevation and they can fly approach procedures on the proper altitudes abased on local pressure.
To use the setting the pilots used is a simple programming step for the animation. As you can see the animation is capable of matching what the pilots would see.
The pressure altitude seen in the altimeter display was corrected with local QNH, which is why we see 300 feet at takeoff, and then back to 2992 at 18,000 feet, the same as the raw numbers in the PA column.
The 300 feet is 40 PA, 300 feet is with the local QNH.
Do you understand pressure altitude?
