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    Re: How Many Chronometers?
    From: George Huxtable
    Date: 2009 May 8, 16:08 +0100

    I had written-
    
    | > The approach to St Helena is of interest. "We hove-to at 4am, July 12th,
    and
    | > at daybreak found the island bearing north-west 10 miles, as expected.".
    | > Shows some confidence in their astro navigation, doesn't it? That they
    press
    | > on in the dark towards a rocky steep-to island until they reckon to be
    | > within 10 miles, and only then do they heave-to. Would we be as bold, I
    | > wonder?
    | > George.
    
    and Jeremy replied-
    
    | I would.  The approach to St. Helena (and Ascension Island) is an easy
    | one.  There are no outlying shoals and the mountain rises very steeply
    | from the bottom.  You practically have to run into the island before
    | you run out of water, even for a deep draft ship.
    
    ==================
    
    But just that approach, that to Jeremy seems easy, is what I would see as
    the problem. No chance of taking soundings to give advance warning of that
    approach. Just a great rocky lump sticking out of the sea in the dark to
    menace an unwary vessel. I don't know whether St Helena was lit, in any way,
    in 1853. Certainly no GPS, and no radar. Jeremy is more confident of his
    astro navigation than I would be of mine.
    
    Fred added-
    
    "And if the weather is clear and the moon is fairly bright, it shouldn't be
    a problem."
    
    The Moon was down.
    
    George.
    
    contact George Huxtable, at  george{at}hux.me.uk
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    
    
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