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    Re: Working a lunar
    From: Frank Reed
    Date: 2007 Sep 24, 22:31 -0400

    I wrote:
    "the idea that there will be an emergency situation where you would lose GMT
    with no means of recovery is pretty outlandish!"
    
    Peter, you replied:
    "Well, no. We don't agree this is outlandish at all. Pretty much par for the
    course, in our experience. Have sailed with 3 GPS units and had all 3
    inoperative at the same time, due to different issues."
    
    Of course the best backup for an integrated GPS system is a hand-held GPS
    receiver in a nicely sealed case (with spare batteries). But I didn't say
    GPS; I said GMT. How many times have you lost track of GMT?? Let's be
    empirical about this rather than theoretical: how many people do you know
    who have lost all track of Greenwich Time on an ocean-going vessel? How many
    times in the past 25 years has this happened to anyone in the world? Do you
    know of any real examples where there was an emergency in which someone lost
    track of GMT, had no wristwatch, no radio, BUT still had an excellent
    sextant and navigational tables? Maybe it's happened lots of times, and I
    just haven't heard. Maybe not.
    
     -FER
    
    
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