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: The Noon Fix
    From: James N Wilson
    Date: 2009 Apr 9, 15:37 -0700
    George:
     
    You asked:
     
    But you didn't answer my question about the sextant correction, and how you
    could know, in advance, what it was going to need resetting to, before the
    time interval was known. That's still puzzling me.
    Your puzzlement is gradually seeping in. I noted that I calculated Dh at the time of maximum altitude for simplicity, implicitly assuming that the slope of the adjusted line was the same as the original. If I were to also calculate it at a time prior to LAN, then I could establish the true slope of the adjusted line. With that defined, the exact time of LAN could be determined posthumously.
     
    I hope this clears it all up.
     
    Jim Wilson

    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---


    ____________________________________________________________
       
    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)