NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Paul Dolkas
Date: 2013 Jan 31, 21:40 -0800
GTC? Greenwich Computed Time? (It’s not listed anywhere in “Celestial Navigation for the Clueless”)
-Paul
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Gary LaPook
Sent: Wednesday, January 30, 2013 2:42 PM
To: paul@dolkas.net
Subject: [NavList 22182] Re: Re: Weems article in latest Air&Space Mag
That's an accurate description of it's use.
This is how I described the Hour Angle Watch in the Time and Navigation exhibit label text: In the mid-1930s, the Longines-Wittnauer watch company marketed a line of watches designed in collaboration by Charles Lindbergh and P. V. H. Weems. The Hour Angle Watch sped computations for determining celestial lines of position. Its bezel and dial allowed navigators to read off the hour angle of a celestial object at Greenwich, eliminating a simple but troublesome calculation. BTW, I do not have a background in celestial navigation, so this exhibit has been a very interesting learning curve for me. |