Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    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
    -- 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/       |

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site