Level flight is always at altitude, over the flat and level surface of Earth
Again, notice how this is entirely circular?
You falsely claim Earth is flat, to have that altitude be flat, to have planes flying at altitude be flying flat, to say Earth is flat.
It is dishonest, delusional BS.
Back in reality, level is perpendicular to down.
Level flight is flying at the same altitude above mean sea level, regardless of the shape of that mean sea level.
A plane flying level does not prove anything about the shape of Earth.
But because you are desperate to pretend your delusional fantasy is true, you keep lying to everyone.
Curves cannot measure as flat and horizontal between two points over a distance or length.
You sure love repeating this lie don't you, even though it has been refuted countless times.
Again, ALL measurements have some level of uncertainty.
That means a small enough portion of a large enough curve CAN be measured as "flat", because it is only flat to within that level of uncertainty.
And that can also most certainly be measured as horizontal.
But what makes your claim even more stupid, go get a flat, horizontal surface, and then draw a circle on it.
Guess what? That circle is a curve which is flat and horizontal.
If you pick any 2 points on that circle, then the between them you have a straight line which is horizontal.
Level is measured over a span of two points, a line of a distance, and constantly measured for level in flights of planes.
No, it isn't.
Planes flying level use the altitude. That is typically at ONE point.
Even their attitude is at one point.
Yet again, you are making up PURE BS to pretend your delusional fantasy is true.
What you are saying has absolutely no basis in reality.
Planes don’t follow in a curved flight path over a curved surface of Earth below them.
PROVE IT.
You keep asserting pure BS with no justification at all.
All the available evidence which says one way or another clearly shows Earth is round.
You have NOTHING to refute that evidence and NOTHING to go against it except your pathetic lies and denial.
Air pressure flows above the flat Earth in flat and horizontal paths.
Wrong again.
Air pressure exists as roughly spherical shells around a spherical Earth.
Again, you just assert pure BS with no evidence or justification.
You cannot claim planes just adjust without measuring for a curved surface below, that’s nonsense.
Why?
It has been explained to you countless times.
They monitor their altitude and make adjustments to maintain that altitude.
That will necessarily adjust for any change in shape of the surface.
And that does not require them to consciously know about the shape they are trying to maintain an altitude above.
If you want to claim it is nonsense, you need far more than a pathetic, baseless assertion.
The curvature of Earth they claim is a known measurement, but they never mention that. It fails to work instantly.
Yes, it is a known measurement, and you can know it to if your pull your head out of ass and start accepting reality.
You say it fails to work, but you are yet to provide a single example where it doesn't.
Your entire post is just a pathetic example of circular reasoning.
Again, your entire basis for every point you have said is your false belief that Earth is flat.
Discard that BS and your entire post falls to pieces.