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: GPS out by miles
    From: Don Seltzer
    Date: 2016 Nov 1, 21:40 -0400
    Initialization error?  Turning on the gps unit and not allowing time for full satellite acquisition and ephemeris download.

    Perhaps it was in 1999 with a unit that couldn't handle the week rollover.

    Don Seltzer

    On Nov 1, 2016, at 3:03 PM, Frank Reed <NoReply_FrankReed@fer3.com> wrote:

    I recently heard a story about GPS fallibility. A sailor related his enthusiasm for celestial navigation. He said that he didn't trust GPS because "sometimes it's wrong by miles". He described sailing off the coast of North Carolina and he knew where he was, but the GPS placed him five miles from that location. I think there's a lesson here... What might that be? Of course without interrogating him in detail, which would have been rude, we can't really be sure what was happening here. What are some of the possibilities??

    Frank Reed

    View and reply to this message

    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