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
    Re: Thin triangle: where is your fix?
    From: Bob Bossert
    Date: 2025 Dec 7, 12:43 -0800

    Hi Kermit,

    I was visually thinking about the legs of the 3 sided triangles.   A smaller triangle, has less uncertainty in position than a larger triangle.   So, I was thinking shorter leg was more certain than longer leg.   That's not true assumption if the intercept/azimuth is from an Assumed Position (Pub229 or NA concise table) sight reduction.  But, I was thinking this example was DR and Sight Reduction using Law of Cosines.  I didn't state that as part of my reason/assumption.

    My answer here was a simple visual maybe probabilistic approach. And something, I always wanted to ask the experts.

    I've read the Nautical Almanac page 282 example,  

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join / Get 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