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    Re: New compact backup CELNAV system
    From: Jeremy C
    Date: 2009 Mar 19, 07:01 -0700

    > Though in this day and age emergency navigation seems to mean drifting
    > in life raft without any control and praying that coast guard got your
    > mayday or EPIRB signal and will pick you up before water runs out.
    > Navigation without mobility is quite useless.
    >
    > Martin
    
    For a merchant ship I would agree with this Martin as liferafts are
    completely uncontrolable, and most lifeboats have only 24 hours of
    fuel and oars (sails are extremely rare on L/B's these days) and
    therefore you don't "go anywhere" but rather flip on the EPRIB and
    SART and await the proverbial cavalry.  However, another "emergency"
    navigation system that would require actual navigation is in a
    sailboat where a wave or other failure wiped out all of the
    electronics (except a watch which should survive) mid voyage and you
    are "stuck" with celestial navigation.  Instead of packing all sorts
    of volumes of sight reduction tables in your limited space, you might
    want to have the various tools described in this thread.
    
    My 2 cents,
    
    Jeremy
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