A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ducruy Jacques
Date: 2015 Aug 6, 01:58 -0700
Inman (1826) give a method of calculation of latitude by double altitude with versine/haversine formulas (1821), by derivation of the method of Duillier. Once the latitude calculated, you'll find the apparent time by sinus formula.
I know a diagram for calculate ZD and azimut : "abaque Favé & Rollet de Lisle" in France, but, in my opinion, not very accurate. This diagram is based of the same principes that Ageton tables (slitting the triangle of position in two right angled formula).