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    Re: Sextant shot accuracy
    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
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    -----------------------------------------------------------------------------
    | 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/       |
    -----------------------------------------------------------------------------
    
    
    
    
    

       
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