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: Chronometer Suggestions
    From: Lu Abel
    Date: 2009 Jan 06, 11:05 -0800
    Irv and Bill:

    It's a MAXIMUM of 1 NM for every 4 seconds, not a minimum. 

    If the body you're sighting is directly north or south of you, even a fairly significant time error would result in a very minimal shift in the LOP produced by the body (the extreme example is Polaris).   On the other hand, if the body you're sighting is directly east or west, then it's Geographic Position is moving by 1 NM every four seconds and any LOP developed from that sight would be off by 1 NM for every four seconds of clock error.

    Lu Abel

    Irv Haworth wrote:
    Minimum of 1 NM for every 4 seconds..( a quick answer)..
    Irvin F Haworth
    W, Van BC Canada

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of William Sellar
    Sent: January 6, 2009 5:05 AM
    To: NavList@fer3.com
    Subject: [NavList 6931] Re: Chronometer Suggestions

    As a beginning celestial navigator, I am wondering how much time and watch accuracy is actually required for practical navigation.  Can we predict how many miles off one would be for every second of time error?

    Navigation List archive: www.fer3.com/arc
    To post, email 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