https://www.youtube.com/watch?v=0xlN9vGVitE In the interest of preserving for posterity the wealth of flat Earth knowledge and research done during the late 19th and early 20th century, I will be starting a series of audiobook and PDF downloads to make them more easily and widely available. Today's selection is William Edgell's 1927 book, "Does the Earth Rotate? No!" Unfortunately none of the book's illustrations are available online, but if you listen and use your imagination you should be able to envision them. I have also added relevant videos and pictures throughout the presentation making it not just an audiobook, but a "videobook" documentary. You can download the full PDF here:
https://www.dropbox.com/s/poce3yblk3rev5z/DOSE%20THE%20EARTH%20ROTATE.pdf?dl=0 
DiggernicksIsAlsoRetarded -3 points 2.7 years ago
Notice how the device doesn't account for the 25,000 mile circumference of earth?
Using basic spherical trigonometry https://files.catbox.moe/sm1v4b.jpg
There should be at least 6 miles of curvature/earth in the way of those signals. This technology can only exist and operate on Earth being a stationary flat plane.