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how do you know the distances to the ships. how was this done?

Radar and map.

and you used what kind of binoculars?

Pretty standard nautic 7x50 binoculars.

i'm not exactly sure how this proves anything, given that a camera with 60x zoom lens brings them back into focus. that would be a ton farther than you are able to see with a 7x zoom and no tripod.

That huge long ship with the dark hull and the white overbuilding was a perfect target for this exercise, and it was perfect looking at it from the waves. Through the binoculars I could very clearly see the hull at 5 nm distance, I could very clearly see the dark hull disappearing and reappearing (apparently behind the sea) at 6 nm distance, and I could very clearly see the white overbuilding but no hull at 7 nm distance. With only my eyes it was indeed a bit unclear, but with the binocular it was crispy clear. No, you can't use a tripod on a boat rocking on the waves, but the ship sinking and reappearing was pretty convincing with 7x zoom. It's beyond my comprehension how such an effect should possibly disappear with more zoom

My simple formula is more or less correct as long as one has the eyes at the sea level, but according to the earth curve calculator the amount of hidden ("sunk") ship is dramatically lower if one has the eyes two metres above the sea level. Hence, the math in this post seems to be pretty irrelevant; it's needed to establish the exact height of my eyes above the waves while the ship is in the bottom of the wave and when it's at the top of the wave to be able to make any prediction on the deck height of those ships.

i think the point for me, is understanding how perspective works. it explains everything. games are made using these perspective techniques with no attempt to make a 'globe' shape, but still have similiar effect of things apparently disappear 'over the horizon'

hotel-long-corridor-with-a-view-of-the-stock-image_csp56291768.jpg

the fact a 60x brings back into view things that have completely 'gone over the edge' tells me that in reality all that is keeping us from seeing farther is air quality.

at times people have seen mountains from incredibly far distances, there are many videos on this topic if you are interested, no need to worry about waves messing up your calculations. i've seen multiple pics of mountains that should be 100s of feet below the horizon be visible down to the base.

so don't limit yourself to boats, there is so much proof out there...

the fact a 60x brings back into view things that have completely 'gone over the edge'

That is your claim - just like it's your claim that one can see Chicago from Michigan. I have no idea on the distance, but one definitively can't see Denmark from Norway.

From what I saw, a 7x50 was sufficient to clearly see the hull of the other boat disappearing and reappearing, admittedly I didn't have any better optics with me, but this "disappearing - reappearing"-effect was clearly not due to perspective, and it was very much in accordance with the math on that curve calculator page.

The ship was huge, it was not disappearing due to the perspective or the air.

not just my claim, funny i just posted about this...

quora agrees you can see chicago. it wasn't until the 60x zoom lenses that we could see the 500+ feet drop predicted by globe earth isn't happening.

here they are talking about it on the news (skip to 11:07)

peace.

then you had a unique experience that you need to document with video evidence. we'd all appreciate seeing proof like that.

but this might shock you, i'm not going to take your word for it.

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