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: On the Mischief of Geographical Position.
    From: Rodney Myrvaagnes
    Date: 2002 Jan 24, 11:18 AM

    This is rigorously true, but it dodges the question that I think people meant 
    to ask, vis: If the local vertical (gravitationally determined) doesn't point 
    to the center
    of the earth or the celestial sphere, then where is the position so measured?
    I can't read a sextant well enough on a small boat so the answer matters, and 
    I would be skeptical if anyone else claims he can. But that is the question, 
    isn't it?
    On Thu, 24 Jan 2002 12:23:38 -0500, daveweilacher@earthlink.net wrote:
    >It is the
    >ZENITH that the navigator is attempting to locate in the celestial
    >sphere. Once that has been accomplished, he projects it down via the
    >local vertical, simply by renaming declination latitude, and GHA
    >longitude, and calls it his  position . This works on an egg, a pear, a
    >lemon or an onion.
    Rodney Myrvaagnes                   J36 Gjo/a

    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