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 Noon Fix
    From: Peter Hakel
    Date: 2009 Apr 13, 11:19 -0700
    Dear NavList members,

    The Volume 1 of HO 249 tables intended for air navigation includes "Table 1: Altitude correction for change of position of observer" and "Table 9: Coriolis (Z) correction" table.  This just occurred to me and I haven't thought about this in detail yet.  Could these tables be of any use for the noon curve construction on a vessel moving during the half-hour or so before and after LAN?  I realize that ships do not move as fast as aircraft, but it looks like our aviator friends have already considered and solved this problem, so perhaps we can learn from them.  The only difference should be in the magnitude of the ground speed, which should make the corrections even easier on more slowly moving surface ships.

    ======================================
    Peter Hakel
    http://www.navigation-spreadsheets.com/

    Spreadsheet demos using an iPod Touch:
    http://www.youtube.com/watch?v=usFK4As6_hE
    http://www.youtube.com/watch?v=h8hwHv1hTpc
    ======================================



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

       
    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