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: Cocked hats, again.
    From: Peter Fogg
    Date: 2007 Mar 16, 12:04 +1100
    Gary wrote:
    his true position may be significantly outside the cocked

    Oh come on, Gary. How would the "true position" get to be "significantly outside"?

    This has to involve significant error. Doesn't it make more sense to eliminate gross error, and error less gross as well while you're at it, both random and systematic, before calculation of position lines so that you can then have more confidence in your calculated fix?

    More sense than just to abandon common sense and say:
    "Oh la la; statistics has just proved that I can have no idea at all of where I am!"

    and he better allow for that possibility.

    And just how is he (or she, or you) going to allow for it, in this retrospective scenario? Is there any better, more correct fix that you can calculate? (Well yes there is, via a reduction of error but not retrospectively, apart from the resolution of systematic error.)

    Regarding your other post today, I too learned that your position was
    always inside the triangle with the most likely point being the center.
    We now know that was bad information.

    Are you sure someone said those words: "always inside the triangle"? I have never come across such a statement.  Could the statement have been more along the lines of the calculable fix lying at the centre of the position lines? In which case it wasn't bad info at all.

    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to NavList-unsubscribe@fer3.com

    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