Dear Frank, I enjoyed your message about determining your position when the sun is close to overhead.
Your theory is sound and I certainly cannot compete with your practical experience but something bothers me... > You measure the sun's altitude assuming > it is within a few minutes of arc from > overhead... How do you measure the altitude of the sun? On land I could measure the altitude with a vertical stick on flat ground but it is hard to be sure that the stick is vertical to within an arc minute or two. On the deck of a heaving ship, when you don't even know which part of the horizon to face, I would guess a sextant would not be too useful. What's the trick? How did you do it? All the best Frank --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
