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: Thoughts on Celestial.
    From: Byron Franklin
    Date: 2012 Oct 24, 15:16 -0700

    Byron:The question of a fix position with error plotted on a chart can be predicted as to in the center of a triangle or outside the triangle, With a visual Line of Position or a celestial LOP.
    The prediction is the same for Visual or Celestial. If the targets are within 180 degrees the fix must be outside, If the targets are more that 180 the fix is in side. The Celestial plotting chart will show the conditions. I worked a celestial fix and added +10 minutes to the HO for systematic error. This gave me a blow up to chart the LOP’S to make them easy to see. I made the HO larger and the ZN shorter making “a “towards the ZN.
    The Fix is marked FIX. Select: Antares ZN 181+Deneb036+Vega096, there are less than 180 degrees and their triangle is away from the fix. The fix is not in the triangle. As predicted.
    Select Arc 247+Dube320+Vega050 the fix is inside the triangle.
    Select Arc247+Deneb066 notice the reciprocal ZN’S equitably bracket the fix the same as to Navaids one to the NW the other to SE bearings would bracket the ship. Pick any combination of the above will predict in or out.

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