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: Frank Reed
    Date: 2009 Nov 12, 23:00 -0800

    Peter F, of the "EP" you wrote:
    "in practice many people adopt a modified DR position without bothering about 
    the distinction between the terms."
    Also, historically, there was no EP. The position "by account" which is close 
    to what we would call a "DR" was usually corrected by estimate for currents 
    And you wrote to John:
    "I suggest that you are only inviting the confusion you complain in advance 
    about by adopting AP as a generic term to cover DR, EP and AP."
    He's not the only one who thinks of it that way. But I think we're narrowing 
    down on the source of the potential confusion here. Just as some people mean 
    (and especially used to mean) EP when they said DR (by narrow modern 
    definitions of EP and DR position), so there are also people who apply the 
    term AP to *any* chosen starting "reference point" for the St. Hilaire 
    intercept method. And that would explain, I think, why John sees a confusion 
    of terminology... maybe?!
    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