Use a calculator? Oh sure! I carry a programmable calculator, but use a book almanac. I feed in the figures from the almanac, as the program requests, and the intercept distance and azimuth for the position line pop out at the finish. I could put an electronic almanac inside the calculator (as part of the program) but if the calculator should decide it has had enough of life, there is always the printed almanac from which I can do pencil-and-paper calculations. A printed book is almost indistructable. It can be chewed by dogs, pee'd on by camels, run over by Toyotas and even chucked on the fire (but not for too long) and it will still be usable.
Were you using a theodolite or sextant Andy?
Geoffrey
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