Nah, you are complicating a very simple test to avoid doing it yourself.
I found my own altitude, and the landmark I used is less than 4 metres above sea level, by all accounts and my own eyes. It’s a small, low island which should be completely hidden by the ocean, IF the earth were curved. But it’s not, because it’s not.
Lol. If you are wondering why results could show you are above sea level, with that instrument while you are - literally - standing - above - sea - level, then I don't know what to tell you
Ahhh, no? That’s not what I’m wondering at all! The fly on the wall thing confused me!
Got it. https://www.phrases.org.uk/idioms/a-fly-on-the-wall.html
Basically from what I understand you are saying is that you took the elevation of an island then figured how far as the crow flies it would take before the published curvature of the earth would drop below sea level. But when you stood in that location and checked your altitude you were, indeed, not below sea level as should have been the expected results? Is that an accurate description?
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