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: Preparing the sky with Vol. 2 and 3 Pub. 249.
    From: Doug MacPherson
    Date: 2017 Sep 25, 10:06 -0700
    Guus:

    You might consider using the Haversine formulas for your star reductions with traditional tables from Norie's or Bowditch as they would have done prior to pubs like 249 or 229.  With this method, all the stars are available.  You are not limited by the constraints of the 229 or 249 publications.

    Cheers,

    Doug 

    On Mon, Sep 25, 2017 at 9:38 AM, Guus Dekker <NoReply_Dekker@fer3.com> wrote:

    Thanks Gary & Ken & David !

    That's exactly what I was looking for ! The HO 249 explanation make sence to me because I want to do my flow of CelNav. exercises [ongoing from the 17th century till now] in a Traditional way at my desk with pencil/paper/charts and the many Pub.'s, no electronics involved, except for the checkup's.

    Regards, Guus.




    --

    Confidentiality Notice: This electronic transmission, including attachment(s), is covered by the Electronic Communications Privacy Act § 18 U.S.C. 2510-2521, and is for the sole use of the intended recipient(s). Unauthorized review, dissemination, disclosure, or reliance on the content(s) of this transmission is prohibited.

     

       
    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