NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant shot accuracy
From: Richard B. Langley
Date: 2012 Aug 21, 16:07 -0300
From: Richard B. Langley
Date: 2012 Aug 21, 16:07 -0300
GPS was available in the 1980s but, like SatNav, not continuously due to paucity of satellites. And equipment was expensive and far from ubiquitous. -- Richard Langley On 21-Aug-12, at 3:47 PM, Greg Rudzinski wrote: > During the 1980's GPS was not available (Doppler SatNav yes). To > gauge celestial navigation observation quality required comparing > with Loran C. Usually I would cross a Sun line with two Loran lines > and was generally within a nautical mile of the Loran intersection. > Rarely more than two miles off. Timing was done with a digital watch > set to a short wave time tick before CN observations. A 7x35 mm > scope was always used from a heights of eye around 80 feet. When GPS > became ubiquitous in the 1990's then unfortunately for most > watchstanders the sextant remained in the box :( Out of habit I > would still run a Sun or star line through the GPS plot to confirm > the electronics. > > Greg Rudzinski > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ---------------------------------------------------------------- > ----------------------------------------------------------------------------- | Richard B. Langley E-mail: lang@unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | | Fredericton? Where's that? See: http:// www.fredericton.ca/ | -----------------------------------------------------------------------------
