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    Re: Differences between GPS and WWV time
    From: Dan Allen
    Date: 2001 Jun 22, 5:35 PM

    From- Rodney Myrvaagnes
    Sent: Friday, June 22, 2001 12:49 PM
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject: Re: Differences between GPS and WWV time
    
    Has anyone tested the fixed-mount versions of popular GPS
    families to see if they are better in this regard? I
    suspect the answer will be no, but they could take
    advantage of the ample power available from the boat or car
    battery.
    
    --- Dan Allen replies: ---
    
    The behavior of my fixed-mount GPSes is the same as battery-operated ones.
    As long as they use a low-power and hence low-megahertz ancient 80186-based
    processor, any GPS will have a hard time doing several of these tasks all at
    once.  (Garmin handhelds use an Intel embedded CPU that is based on the
    80186, or at least early Garmins did.)
    
    I have asked Garmin to add a feature to their GPSes, a time-only mode where
    it reads out nothing but accurate time, but they haven't done it.
    
    On the bright side, in the Garmin eTrex they originally didn't even show you
    seconds anywhere!  Only hours and minutes.  This is crazy in a device that
    has internally very accurate time from the satellites.  I made my case to
    them in emailed and amazingly enough, just a few weeks later, a new rev of
    the eTrex software was posted on their website which displayed seconds!  One
    can download the new software and flash the ROM from any PC.
    
    If you have a Garmin GPS you should go to their website and see if you have
    their latest software.
    
    Dan
    

       
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