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: The "Death to the Intercept Method" revisited?
    From: Tony Oz
    Date: 2017 Sep 5, 07:31 -0700

    Hello!

    I think to try a two-pass approach to the direct calculation method:

    • take two sights and do all the calculations according to the 7.5x formulas (pretending both sights were taken simultaneously) - thus obtaining a preliminary position;
    • using that preliminary position data - to consult the H.O.249 vol 1 regarding the azimuth of the body of the earlier sight;
    • with the azimuth (though not precisely accurate) do the advance of the H1 to the moment of time of the second sight;
    • now one may repeat all the 7.5x formulas with the advanced H1 - hoping to arrive to a reasonably more accurate position fix.

    Please comment.

    Regards,

    Tony

       
    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