One can, of course, acquire this confidence by setting one to the other.

-- Ashley

On Fri, 2008-10-24 at 08:45 +0100, Peter Vince wrote:
> Hi Rob,
> 
>       Two would give you SOME confidence if they read the same, and at least 
> you would know to be wary if they didn't.  With 
> three, you can use a majority voting system, and that is what we do (although 
> we are not at sea!)
> 
>       Peter Vince  (London, England)
> 
> 
> On Fri Oct 24  5:31 , Rob Seaman <[EMAIL PROTECTED]> sent:
> 
> > From Jack London, a question:  "Why did you sail with only one  
> >chronometer?"
> >
> >     http://catless.ncl.ac.uk/Risks/25.41.html#subj10
> >
> >If two chronometers are "no better than one", why are three better  
> >than two?
> >
> >Rob Seaman
> >National Optical Astronomy Observatory
> 
> 
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