Where is the flat edge? At sunrise or sunset? At the full Moon or the new Moon or the quarter Moon? Where and when do the hours go around the flat edge?
There are different hypotheses for the "model" but the "model" (which is hypothetical and based on conjecture, since FE don't have the scientific apparatus behind them to prove any of it) is distinct from the facts and the evidence.
There are myriad examples of when things can be seen too far given the globe curvature math. I have yet to see any convincing explanation for this. Globers simply pull out the word "refraction" as their
deus ex machina to get out of the jam, but it's never been proven, and in fact I find it preposterous for numerous reasons. And that's all it is, a word, but they've never proven that it is or even can be responsible for the observations.
Heck, if someone claimed that light bends around the curvature of the earth due to gravity or some other phenomenon that would be consistently present, I would pay attention. But "refraction" is a complete joke, an act of desperation by the brainwashed globers who apply it with confirmation bias. But it's simply ludicrous to any thinking person. I'd be willing to look at an argument that the earth is a globe but it's 50x larger thane we're told, thus accounting for the "see too far" phenomenon.
But refraction is a joke. It cannot explain the clarity of these images, nor the consistency with which they're obtained, nor can it explain why the earth/water bulge that is allegedly between the viewer and the target object is magically just erased, whereas it too should be refracted back, causing distortion as different layers of the refracted view would overlay on each other. We have real examples of refraction, and they're always distorted. And refraction is destroyed by the two-way laser experiments. In order for light to follow exactly the curvature of the earth, it would have to encounter an ever-increasing density gradient. But if it encounters an ever-increasing gradient in one directly, it would be decreasing when coming in the other direction, and thus would refract the light upward. You can't have it both ... when you're talking about two lasers at the same elevation and just a couple yards apart.
I'm still waiting for an actual coherent explanation for all the "see too far" experiments from the globers ... and all you get is "refraction", "yep, refraction". Bullshit. And you know it's bullshit.