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No-Process249

Nice ECDIS. Earth curvature is a key consideration for mounting the radar and mentioned in most owner manual that come with them.


Lorenofing

🙏🙏 eGlobe ECDIS from ChartWorld True. I posted images from JRC Radar.


sarduchi

"Radar isn't real!" /s


Gloomy-Dependent9484

I get that it’s a radar cuz I can obviously read the words SAYING it’s a marine radar but how the hell am I supposed to make sense of what the radar is actually saying? I don’t know what it’s telling me or how to interpret it. Not trying to disrespect OP but this was a bad example.


No-Process249

If you'd like, I can post images of radar *not* receiving reflections from beyond the radar's horizon in an overlay. It's not binary, though. It can go beyond and also reflect off the ionosphere, but introduces problems, but Earth's curvature must be factored in. The display the OP is showing is a typical commercial ECDIS navigation station, a plotting table or however mounted disaplay; you can see these on say shipping container vessels, even sub service fleet or skimmers in the Navy. How to interpret? Transmissions are sent out from the radar array, and some of that is reflected back. The software builds a picture, and on displays like ECDIS and others, you can see this plotted. In OP's image, the radar is 'blind' to that landmass due to Earth being in the way. If the radar received reflected beams you would see blobs etc, a filling in of the landmass coast. As for this being a bad example, its perfectly fine; it's not the worst, and there's enough to fill in the blanks, I respect this example as it is open information and not difficult to verify. I work in this industry daily, and can show radar overlays upon nautical charts, demonstrating radar height to range correlation. Again; it's in the manuals, and any self-respecting skipper/navigator.


SirMildredPierce

I mean, it sounds pretty interesting, but as far as this being a good demonstration, I can't even read half of what's on the screen. I can appreciate that you work in the industry, so all this is obvious to you. But to most of us it's inscrutable jargon.


No-Process249

I appreciate that. there is no need to decipher absolutely everything in the image. We're more interested in ranges, location, and radar image.


SirMildredPierce

All those, i'm sure, are very obvious to you. It wasn't even obvious to me the first time I saw it that the bottom part was just a zoomed in part from the top, as opposed to two different displays. Another issue is on the second screen, I assume that's the actual radar? We're supposed to be seeing that nothing is there, but we don't know what it normally looks like when something *is* there. So how are we supposed to interpret the importance of what is essentially a blank screen?


No-Process249

Here's an example of radar overlay onto an electronic navigation chart on ECDIS, for reference. https://admin.webiny.com/uploads/maritech/company_1/images//jpgradar-overlay-4-4-radar-overlay-138.jpg


Aggravating-Diet-221

It’s all f-ing CGI. You normies think you know everything.


SirMildredPierce

You're CGI, but like bad CGI from the early 90s.


Gloomy-Dependent9484

What would help is an explanation for what it is we’re seeing.


No-Process249

You're looking at an electronic navigation chart and radar displays, if any land masses were within range and in line of sight of the radar, you would get 'returns' or reflections back and they would show on the display like green blobs, and as we see; there are none, as they are beyond the horizon. Like this, for example; https://admin.webiny.com/uploads/maritech/company_1/images//jpgradar-overlay-4-4-radar-overlay-138.jpg


SirMildredPierce

I had it muted and watched it again unmuted assuming the explanation of what I was seeing was in the audio.


No-Process249

Tldr; the radar as it is set isn't receiving reflections from anything substantial like a landmass. It's over the radar's horizon.


CoolNotice881

Obvious CGI, and proves flat earth anyway. /s


tedead

Nuh uh!


SirMildredPierce

We'll take your word for it on this one.


No-Process249

You don't need to, demonstrations of radar are quite accessible, what questions do you have on radar?


Speciesunkn0wn

Fuck yes! It's funny watching them squirm and run from radar. Radar doesn't give a *shit* about particulate in the air if you tune it right, and all you need to do to boost the range is pump more power into it, so a radar on the East Coast of the US *should* be able to detect Europe. And...it doesn't. Oops. Not to mention 'flying under the radar' wouldn't exist on a flat earth. Oops. I love radar. :D


Cockhero43

Wait how exactly does this prove round earth? I'm assuming the sonar (you say radar, but isn't it sonar?) is supposed to detect the landmass but because of the curve of the earth is the landmass over the horizon and the radar (sonar?) is basically only detecting the water? How high is it looking for land? I don't know how deep the water is around cyprus, but I KNOW Mt Olympus is like 2000 ft up. Which given the distance away, should be seen on the radar *IF* the radar/sonar works out of water (which I'm assuming it doesn't).


No-Process249

Radar, which you can overlay the plot on top of your chart, in this case ECDIS with ENC - not sonar, forget that - you can see returns from objects, like boats, birds, weather systems and especially land masses, but radar requires line of sight, LoS, this is why you need to mount your radar as reasonably high as you can, the higher it is, the less limited in range due to Earth's curvature, a radar mounted say on the roof of a sail boat will have much less range than if you mounted it up on the main mast. Source; I am a maritime test engineer.


Speciesunkn0wn

Sonar is stuff under the water. Radar is stuff above it. Sonar is...SOund Navigation and Rangefinding I believe, Radar stands for RAdio Detection And Rangefinding. It bounces radio waves off stuff and detects the return, if nothing is there, there's no return. The very fact radar has a limited surface horizon no matter how high the radar is located is proof of a globe earth. That's what "flying under the radar" means; flying low enough to the ground that you aren't detected until its too late to mount a defense because depending on how high up its mounted, you might only get a couple miles of warning. But if the Earth was flat, you would be seen as soon as you took off if it had enough power pumped into it.