The theory behind how one can know the altitude you should see a celestial body in the sky, if you know your position. In other words: How was the Sight Reduction Table compiled?
Celestial, Astro, Navigation, Sextant, Reginasailing, Oceansailing, Bluewatersailing, RYA, Ocean Yachtmaster, Hallberg-Rassy, HR46, Sailtraining, Sailing,
