![]() ![]() To prevent damages in cells containing formulae the worksheets are protected and cells are locked, we may use the unlocked cells only (green background). We can use this simple excel file to verify (or avoid) the manual calculations ! The data we need are : true altitude, LHA/declination, computed (estimated) altitude and azimuth We’ll use these to plot lines of position (LOP) on a nautical chart, plotting work sheet, or a simple graph paper to determine the position of the ship. after having collected all the data : estimated latitude and longitude, declination / local hour angle of the observed celestial bodies (stars, sun, moon and planets ) and sextant reading (altitude). How to calculate altitude and azimuth using a free and intuitive spreadsheet (excel) ![]() Knowing and using the celestial bodies (stars, Sun, planets and Moon) ![]()
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