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: Old Navigation Techniques
    From: Dan Hogan
    Date: 1998 Jul 22, 10:42 AM

    Everything I have read about Columbus seems to indicate that he had
    trouble dealing with the math and procedures for a Noon Sight let
    alone the calculations needed for Lunars. The first suggestion for
    using Lunars seems to have been by the astronomer John Werner of
    Nuremberg in 1514.
    
    Robert H. Fuson in "The Log of Christopher Columbus, International
    Marine, 1987, ISBN 0-87742-951-0", says that Columbus carried a
    Quadrant and possibly a Backstaff. He tried the Quadrant 5 times and
    found it at variance to his DR. Since Columbus was of the loxodrome
    school of DR navigators who followed 32 points of the compass he
    didn't have a need for knowledge of his latitude beyond 2 to 3
    degrees since he was following the compass. Then too, he also kept
    time with an Hour Glass. How, do you do Lunars with an hour glass???
    
    His estimate of the circumference of the earth was too small,
    intentional or not. Also at the end of the 16th century charts still
    showed Venice too far north by three degrees and Genoa by two
    degrees.
    
    He did it by DR and LUCK.
    
    
    
    Dan Hogan WA6PBY
    "Gacha" Catalina 27
    San Pedro, CA
    dhhogan{at}concentric.net
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=
    =-=  TO UNSUBSCRIBE, send this message to majordomo{at}roninhouse.com:     =-=
    =-=      unsubscribe navigation                                         =-=
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=
    

       
    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