Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: No Lunars Era
    From: Alexandre Eremenko
    Date: 2004 Dec 6, 21:52 -0500

    On Mon, 6 Dec 2004, Frank Reed wrote:
    > You should
    > take a look at the opening pages of Bowditch's appendix
    > on occultations and
    > eclipses. He explains that the calculations are easier if you know
    > how to use +
    > and - signs on numbers, as in algebra.
    In this connection, I cannot resist telling the story which
    is somewhat away from the main topic of this list.
    In 1889, they discussed a formula for measuring the racing yachts.
    "One of the Nestors of the New York yachting, a man whose
    expert knowledge of sand-bagger yachts entitled him to speak
    with authority and to be heard with attention, was called on for his
    opinions. His remarks were brief and very much to the point:
    "You want a plain and simple rule, with no hyeroglyphics and
    no plus in it. Who knows what plus is? I don't know what plus is.
    You take the length overall and the length on the waterline, add them
    together and divide by two, and you have a plain simple rule
    with no plus in it".
    (C. A. Marchaj, Seaworthiness. London 1996, p. 41).

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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