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: Celestial observations v. Coast Survey Methods
    From: Herbert Prinz
    Date: 2002 Jan 18, 7:40 PM

    Thanks for the pointer to this highly interesting web site.
    Concerning the use of the telegraph, make no mistake: The determination of longitude
    was still based on the exact same old celestial methods, mostly timing transits.
    Just the technology of time signals (nowadays we would say: time transfer) has
    changed. First there were eclispses, then lunar distances, then the telegraph, then
    radio, and finally the GPS.
    Herbert Prinz (from 1368950/-4603950/4182550 ECEF) (datum-free!)
    Chuck Griffiths wrote:
    > I always figured they mostly
    > took very accurate celestial observations. If you thought so too, check out the
    > history of the US Coast Survey at http://www.lib.noaa.gov/edocs/CONTENTS.htm. It
    > will completely amaze you. For instance, the first truly accurate longitude
    > reference in the US came using the "American Method" - using the telegraph to
    > determine time difference between two points.

    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