Sea level pressure

In aviation, an instrument in the plane (the altimeter) measures the absolute pressure wherever the plane happens to be. But without a reference point — the sea level pressure — the instrument would report an arbitrary altitude. Without this, Air Traffic...

The air up there

I’m a pilot and love aviation and just about everything about it (except the cost). Today I finally got to go up on a pristine clean day after a long hiatus. Took The Boy and let him have some stick time (as far as he knows) for the first time in his life. Great...

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