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: AP terminology, WAS: 2-Body Fix -- take three
    From: Peter Fogg
    Date: 2009 Nov 12, 12:21 +1100

    Jim Wilson wrote:
    I have too often created more confusion in attempting to answer questions, but I'll try again. The Assumed Position is merely a convenience for the use of tables to reduce sights. It is chosen near the DR, and is commonly selected to make a table entry a whole number of degrees. With calculator or computer solutions, there is no need for an AP. Nor was there with Ageton.
    No confusion there for me, Jim, I think your definition/explanation is clear and succinct.  With sight reduction methodologies that do not rely on an AP the DR is adopted, and intercepts are calculated from it.  This has some advantages for plotting purposes as the intercepts are typically shorter and thus potentially more accurate.

    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com

    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