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: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
    From: Hewitt Schlereth
    Date: 2009 Apr 17, 12:30 -0400

    Years ago I did a book on Lat/Lon by Noon Sight, so I've been
    following this topic with considerable interest. I dusted my book off
    and using the altitude and time data from George's spread sheet "Long
    Around Noon.xls (SS)" refreshed myself on the method which consists of
    taking from a table based on the north or south component of a boat's
    speed, a  longitude correction in minutes of arc.
    
    My work sheet is attached, but to cut to the chase, I got a longitude
    1' less than George's; latitude the same as his.
    
    On 4/17/09, James N Wilson  wrote:
    >
    >  George:
    >
    >  Oops! I was hasty when I compared the five minute difference between
    >  maximum altitude and LAN to the hour of the sight taking process. It's
    >  huge compared to the six minutes I allocate for plotting. But I can't
    >  tamper with the sight selection, since it's natural. I may have to change
    >  the WT scale. I'm about to learn some more.
    >
    >  I appreciate your criticism. It  makes me think.
    >
    >
    >  Jim Wilson
    >  ____________________________________________________________
    >  Save $10 on Flowers and Gifts!
    >  Shop now at www.ftd.com/16714
    >
     
    >
    >
    >  >
    >
    
    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    
    

    File: 107985.lon-by-eq-alts.doc
       
    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