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: Classification of the methods for clearing the Lunar Distance
    From: Fred Hebard
    Date: 2003 Apr 10, 17:10 -0400

    I'm sending this again because it didn't seem to make it onto the list
    archive, which is where I read the list.
    
    
    
    I was browsing through the chapter on methods of sight reduction in the
    1962 edition of Bowditch, and came across several items of interest
    
    First, in regard to George Huxtable's comment about the poor old
    practicing navigators becoming confused, the sheer number of methods of
    sight reduction must have been confusing.  Numerous analog-type
    computers were devised for sight reduction.
    
    Second, in regard to Bruce Stark's method of clearing lunar distances,
    Bowditch says haversines were not used in navigation until the turn of
    the 20th century, although they had been used previously in astronomy.
    Gaussian logarithms for use in navigation were first developed for use
    during World War II, but the developer died before a complete method
    could be implemented.
    
    I don't believe Bruce Stark would be violating the copyrights of the
    Navigation Foundation if he were to outline his method of clearing
    lunar distances, only if he were to copy the article published in their
    newsletter.  This thread motivates me to attempt such an outline, but I
    am obligated by the U.S. government at this time of year to go through
    a tedious compilation of my income, and sometimes to then pay them
    money after all that work!
    
    
    

       
    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