NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant Accuracy and anomalous dip.
From: Richard M Pisko
Date: 2003 Mar 20, 18:00 -0700
From: Richard M Pisko
Date: 2003 Mar 20, 18:00 -0700
Back before the dawn of time (on Mon, 17 Mar 2003 19:53:20 +0000, to be exact), George Huxtablewrote: >Dipmeters have been invented and used in oceanographic survey work. A crude >but effective dipmeter can be knocked together without great expense. It >requires a view of the horizon in two opposite directions to be visible >simultaneously from somewhere on deck. > Is there a handy web reference or drawing? Most of the hits on Google seem to be referring to the magnetic dipmeter. I wonder if it would look something like a WWI or WWII rangefinder without the two end prisms / mirrors? -- Richard ...