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
    or...
       
    Reply
    Re: Systematic Error (LOPs revisited)
    From: Peter Fogg
    Date: 2003 May 30, 09:05 +1000

    From: Geoffrey Kolbe
    > In her little book, "Celestial Navigation for Yachtsmen", (see the section
    > on Selecting The Best Position) Mary Blewitt seems to discuss the
    > techniques George Bennett was talking about. Plenty of pictures too...
    
    I'm not surprised to hear this, truly original ideas are very rare. Apart
    from that, over hundreds of years some of the finest minds of each
    generation were concentrated on the question of how to improve navigational
    techniques.
    
    George Bennett's involvement with this one was as a teacher of surveying,
    and for many years this technique was taught to surveyors as a method of
    identifying systematic error, if present, and so correcting and improving
    their already meticulous astronomical observations made with a theodolite
    mounted on a tripod. They were concerned with fractions of seconds of arc
    rather than minutes but the principles are the same.
    
    When I told him about the Great LOP Controversy he was puzzled and mildly
    surprised that this technique was not more widely known.
    
    It shouldn't matter where the LOPs come from, as far as I know they could be
    from compass bearings in which case the technique could be used to identify
    and quantify deviation, for example. I intend to do more plotting myself,
    using old observations I have recorded. I did think of using the technique
    on Silicon Sea exercises but as they are artificial sights it may be asking
    a bit much to expect systematic error. Unfortunately this won't happen
    before July in my own case but I'm hoping others may also be interested
    enough to do some plotting.
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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