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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Reeds or W Hall
    From: Ducruy Jacques
    Date: 2015 Aug 4, 06:27 -0700

    Hi Paul,

    Another little observation : it seems there are two versions of "methode du meridien estimé" :

    1) english version, with versine formula : vers (L-D) = vers DZ - cos D cos L vers HA ;

    2) french version, with calculation of latitude by the formula of "right angled triangle"(as Borda' double altitude method).

    In my opinion, the english version is only valable between the "limites of circumméridiennes", as we said in french. The french method seems more "tolerant". But it seems that, in France, this method had only a theoric interest.

    Best Regards

     

    Jacques

     

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID 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