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 Accuracy Now.
    From: Geoff Kuenning
    Date: 2000 May 02, 6:40 PM

    > There is no real need to know the boat's
    > position to an accuracy of 30 metres or less.
    I must disagree.  History is filled with the bones of those who said
    "there is no need to do X".
    In 30 seconds of invention, I can come up with an example application
    for high accuracy: superior anchor alarms.  If you have reliable
    accuracy, it is trivial to write a computer program that will first
    infer the swing circle, then detect dragging without being affected
    the swing.  With 1-meter accuracy, it should be possible to detect a
    2-meter drag, which is much better than what most people can do right
    now.  It should be only slightly more complex to alert the owner to
    wind changes that are worthy of more careful attention.
    (Yes, an experienced sailor won't need the crutch of the alarm, and
    will awaken himself on wind shifts.  Not all of us have that
    Other examples of the application of high accuracy would be for
    fishing and diving, where precise location within an unmarked area can
    be critical to success.
        Geoff Kuenning   geoff@cs.hmc.edu   http://www.cs.hmc.edu/~geoff/
    There are some Perl programs that look like nothing so much as line noise.
                    -- Margaret Fleck

    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