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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Azimuth and Declination formulae
From: Peter Fogg
Date: 2005 Jul 20, 16:26 +1000
From: Peter Fogg
Date: 2005 Jul 20, 16:26 +1000
> From Lu Abel > > ...The whole reason for versines and haversines was to allow sight > reductions to be done using logarithms (and therefore the requisite > multiplications become additions); but logs are not defined for negative > numbers, hence the need to shift everything to have a positive value. > So in order to use haversines log tables are needed?