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: Why do we ocean navigators defer to 249 when 229isbetter?
    From: Bruce J. Pennino
    Date: 2014 Sep 2, 09:16 -0400
    By the way, in some bookstore or online , is it possible to buy the original H.O. 208 manual, Dreisonstok? Letcher's book is pretty good , but  I don't like carrying it around .  And I really don't want to photocopy or print 80 pages. Ween's  LOP 1927 is 51 small /medium pages.

    Also, I often check my 249 sight reduction with my TI 30.....sto1,2,3 go! Really quick.


    On Tue, Sep 2, 2014 at 1:46 AM, Bill B wrote:

     On 9/1/2014 5:41 PM, Jackson McDonald wrote:
    > Are there any advantages to using any of these tabular methods as
    > opposed to the Law of Cosines method?

    To paraphrase Frank Reed, "Computing power is cheap." A NA and $10
    TI30XA does it all.

    Score 1 for the cosine method.

    Current tabular methods can be done manually if you can add and subtract
    DMS in the sexagesimal system. No electricity required.

    Score 1 for tabular methods.
       
    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