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    Re: Longitude by Sunset
    From: Alexandre Eremenko
    Date: 2012 May 7, 15:15 -0400

    Greg,
    
    > A Bris is good enough for primary navigation and would make a most
    > excellent lifeboat addition.
    
    Cassens-Plath sold ungraduated Bris.
    Graduating it (or producing with pre-assigned angles
    will be more expensive.
    
    > As for the
    > watch...well the one on the wrist
    > should be good enough if it is a quartz that has been checked by time
    > tick.
    
    The problem is HOW LONG before the lifeboat is needed,
    it can be checked:-)
    You cannot count on an average lifeboat passenger checking
    his wristwatch with time signals shortly before she boards
    a lifeboat:-)
    
    > A pub 249 style almanac (one sheet) and a trig calculator (even a slide
    > rule ;-) rounds out the kit.
    
    I strongly opt for a Bygrave rule instead of a calculator.
    Or Complete-on-board-Cel-Nav book.
    You cannot rely on a battery driven equipment for a lifeboat.
    
    
    Alex.
    
    
    
    

       
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