NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: sextant without paper charts
From: Bill B
Date: 2008 Oct 31, 01:15 -0400
From: Bill B
Date: 2008 Oct 31, 01:15 -0400
> Lu Abel wrote: >> Bill: >> I suspect we are actually closer in viewpoints than you may think. I am sure we are, based on list history. Hence my comment after the fun factor and electronics failure, "But you know all of that ;-)" I apologize if I was a bit tongue-in-cheek about what I felt was closer to sardonic wit or the Socratic method on your part--playing devil's advocate if you will. As spherical trig was not available in high school for me (Indiana, rural school in the early to mid 1960's) and I switched majors from engineering to psychology in college--interest in consumer research--before I ran into spherical trig at Purdue University; and I had forgotten almost all the trig I knew, the formulas were intimidating. Spherical trig outside of cel nav still is still intimidating for me. Looking at the Bowditch version, I started playing around and soon found that once I got into obtuse angles it became the usually "If it is a Monday in Montana, add 180 degrees." You may recall my "aborted" post on the subject. 229 was great in the beginning, as I could leaf through the pages and see the relationships between LHA, declination, and to a lesser degree latitude vs. HC. Like tides when living 100-200 yards (meters) off the Long Island Sound (Connecticut, USA), or knowing clock time +/- 15 minutes near home by the sun, I developed a gut feel. That helps when "speed dialing" reductions on my TI-30Xa. If I mis-key, I feel it in my gut when it is more than a bit off. Bill B. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---