Airplanes calculate all International Standard Atmospheric parameters on the premise such calculations take place on a globe. That's correct.

Yes: one of the MAJOR accomplishments in ALL GLOBAL TRAVEL,

was the INVENTION of what's called the MARINE CLOCK, formally named

"the MARINE CHRONOMETER"

which would not stop on plunging, stalling, sliding British ships.

The KING of England put out an award contest for 20,000 British Pounds Sterling, to the man who could solve the longitude problem.

John Harrison solved this problem and had collected half the prize money but bureaucrats would not pay him all of it.

He kept refining his clocks til he invented the H4 clock which was a watch-sized precision chronometer with near absolute reliability on ships.

The SAME King of England, 35 YEARS after announcing the global contest, then insisted Harrison be paid the REST of the award for solving

''the longitude problem.''

https://tinyurl.com/yj66c65k

I'm the wireless telemetry and communications engineer, for aircraft and land based communications and tracking,

trained in the SPHERICAL mathematics, that make this planet able to be charted by man,

navigated by man,

and communicated upon and around, wirelessly by man.

YOU got YOUR education from YouTube

and couldn't point to, and identify the mathematics for resolving spherical mathematics,

because YOU DON'T KNOW WHAT THEY LOOK LIKE

or you'd know what LONGITUDE and LATITUDE being

the COORDINATES system for this planet, means.

It means it can ONLY be spherical

it means it can ONLY have a specific, and EXACT DIAMETER,

hence circumference; hence, miles per degree of travel, at various locations around the SPHERE of the planet.

You will not make one, single WORD of it, go backward.