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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Haversine v Versine?
From: David Fleming
Date: 2015 May 18, 15:38 -0700
From: David Fleming
Date: 2015 May 18, 15:38 -0700
I have given my Navigation students the formula hav(Zd) = n+(1-n-p)hav(t) as the preferred calculator backup method along with 4 place hav tables and a Rust azimuth diagram.
Because the solution requires
a) 4 in head additions - {eg 45d 18m - 10d25m}
b) 4 table lookups - haversine table
c) 2 additions - ( eg abcd + efgh) this strikes me as harder than case a)
d) and one 4 digit x 4 digit multiply
e) plus Rust diagram
The haversine table is really small ( but to my old eyes Hanno has made it factor of 2 too small.)
P.S. I think the name for this needs to be distinct from Doniol.
