bmlsb69 | Flat Earth 31.63 miles..Undeniable Proof. @bmlsb | Uploaded February 2016 | Updated October 2024, 1 hour ago.
Earth curvature calculator
dizzib.github.io/earth/curve-calc/index.html

Santa Barbara swell / tide chart for 02/07/16
tides.mobilegeographics.com/locations/5608.html?y=2016&m=2&d=7

obstruction formula + 1 example.
youtube.com/watch?v=GSHo-1zCMFE