Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Sumner Line using Ex-meridians
    From: Greg Rudzinski
    Date: 2013 Nov 16, 16:09 -0800

    There has been discussion recently on the impossibility of a single celestial observation fix. Searching back in the archives found the late George Huxtable very eloquently criticizing the concept of a single celestial observation fix.

    https://NavList.net/m2.aspx/ExMeridian-Exercise-Huxtable-dec-2010-g15001

    George suggested plotting ex-meridians using different assumed longitudes. The attached plot illustrates this with two ex-meridians using different assumed longitudes. Each ex-meridian latitude and assumed longitude can now be described as a point on a single Sumner line of position that exactly matches the azimuth/intercept line of position.

    So I think it is safe to say the single observation ex-meridian/LOP fix myth is busted. Byron will now have to return all those cokes ;-)

    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
    ----------------------------------------------------------------

    File:



       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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