A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Cugle - longitude at sunrise and sunset
From: Gary LaPook
Date: 2013 Apr 30, 13:33 -0700
Hm-mm, "Not to be entirely relied upon....a fairly good idea of his longitude" when taken from a ship at sea level. I notice that the computation requires the use of haversines, Noonan only had HO 208.
Are you going to bet your life on this procedure, looking for a small island from a plane without knowledge of the proper dip and negative altitude refraction corrections from altitude? Another thing that people forget, procedures that might be useful on a ship, with virtually unlimited endurance, are not very useful in a plane with only a couple of hours of fuel. If the shipboard navigator can't get an accurate fix when approaching a landfall he can heave to or stand off and on until he gets one. A flight navigator doesn't have this luxury.
--- On Tue, 4/30/13, Dave Walden
From: Dave Walden <waldendand---.com>
Subject: [NavList] Cugle - longitude at sunrise and sunset
Date: Tuesday, April 30, 2013, 12:56 PM
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