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    Re: Choice of timepiece
    From: Douglas Denny
    Date: 2009 Nov 12, 15:07 -0800

     "...Timepieces are one of the ways CN has changed
    in the age of GPS.  You can always check your watch against the GPS
    time..." 
    =========
    
    No you cannot.  This has been aired here before I believe.
    
    Unfortunately,  the designers of GPS equipments do not necessarily incorporate 
    correct UTC time in the _displayed_ time.
    The display time can be several seconds 'out' from the correct UTC.
    
    I have no idea why. It is a gross and stupid and entirely avoidable fault in 
    my opinion and an indictment of poor and/or cheap design, and could be 
    entirely eliminated very simply with very little effort with good design.  In 
    fact it must be a simple software design fault as the hardware has internal 
    one second pulses available which are incredibly accurate.
    The fact that the rising edge of the one second pulses available are accurate 
    to close to atomic standard time is plain silly when the display can be 
    several seconds wrong.
    
    My Trimble Tanspak display update is always one second behind true UTC for the 
    update time - at least it is only the next second update 'out' - not several 
    seconds.
    
    The only way to be sure is to take a shortwave receiver with you and use 
    standard time signals or to be sure of your GPS if it is consistent and 
    correct in the display of time having checked it against a standard.
    
    I have a small Sony ICF-7600 receiver (7" x5" inches in size) which I have 
    used for 'mobile' use for about 20 years which is in effect a miniature 
    communications receiver with BFO for CW reception and you can use an external 
    antenna if wanted, though the small telescopic whip is OK mostly.
    
    You can obtain time signals (one second or tenth second pips) in Europe 
    available 24 hours on 4.9996 MHz and 9.9996 MHz (RUM from Russia); and there 
    is WWV in America on 5 and 10 MHz.
    Spoken Wx reports too from Shannon for worldwide airports and there are other 
    useful stations too worldwide.
     
    Connect your laptop and with the suitable decoding software to the 
    communications receiver and there are 'proper' Weatherfax stations available 
    for weather maps (surface isobar charts  and  progosis charts too) broadcast 
    24 Hrs.  I regularly use the Northwood on 4610 KHz here in the UK.
    
    
    Douglas Denny.
    Chichester.  England.
    =======================
    Original Posting:-
    
    David,
    
    I too navigate with a Timex.  Mine is a Timex "Indiglo" which cost
    about $15 -- if I remember right.  It consistently looses about one
    second in four months.  Timepieces are one of the ways CN has changed
    in the age of GPS.  You can always check your watch against the GPS
    time.  And there is no need for a mate to write down the sight time at
    your call of "mark".  You can quickly look at the seconds digits
    without any appreciable loss of time.  No need to keep a chronometer
    log and make watch corrections.
    
    Welcome to CN in the GPS age,
    
    JK
    
    
    
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