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: Batteries for Quartz Watches
    From: Bob Trenkamp
    Date: 1996 Oct 01, 22:05 EDT

    --- Phil Kohl wrote:
     The thought is that if one
    is going to use quartz watches on an extended voyage, one should have spare
    batteries, the tools and know how needed to replace the batteries, and a
    time reference for resetting the watch after the battery is replaced.
    --- end of quoted material ---
    There's an alternative:
    I take several quartz watches and "rate" them - - i.e., I compare their time to
    a known standard such as WWV by radio or phone several times over the course of
    a few months. By plotting their error and drawing a visual "best straight line"
    through the points for each watch, I develop a graph for each watch that
    permits me, knowing the date, to very accurately convert the time read from the
    individual watches to GMT. One of these watches is always my Casio barometer
    watch, but often the others are "$1 each" or "2 for $5" watches I pick up
    whenever I find them on sale at the checkout counter.
    The battery on my Casio lasts for several years. Ditto that for the "dollar
    watches". If I ever had to replace a battery on one of these watches at sea,
    I'd either reset it to a WWV type signal (available from several sources all
    over the globe) or I'd use the GMT reading from the other watches to establish
    the real time. In any event, I'd start by aassuming that the new rate line for
    the watch would be the same slope as it was before the battery change.
    ps: if you're running a Mac, and if there's a UNIX server on your internal net
    somewhere, you can run a neat little app called "Network Time" that lets you
    synch your Mac clock with the NBS within milliseconds.
    This mail list is managed by the majordomo program.
    To unsubscribe from this list, send the following message
    to majordomo@XXX.XXX:   unsubscribe navigation
    For help, send the following message to majordomo@XXX.XXX: help
    Do NOT send administrative requests to navigation@XXX.XXX -ben

    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