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How do you do an "error plot"?  I'd like to rate my own watch for a
transatlantic passage (Newfoundland to Ireland) this July.

David Martin
----- Original Message -----
From: "RHT - travelling" 
To: 
Sent: Thursday, January 08, 2004 10:41 AM
Subject: Re: Time on a small boat CN


> > Doug, perhaps you can tell me what rates of errors you have seen
> > logged for the chronometers you use?
> [snip]
>
> Jared,
>
> I've found that I can reduce the error of an inexpensive quartz watch to
> less than one second uncertainty per month simply by rating it. As a
matter
> of fact, I've begun rating my wristwatch for next June's Newport Bermuda
> Race already. Because the watch stays buckled to my arm almost 24x7, the
> ambient temperature doesn't seem to be a problem, and all I need to is
plot
> it's error once per month. Having done this on Jan 3rd, I'll add error
plots
> every thirty days, and even if WWV fails me - as it did last summer on the
> Newport to Hamburg Race, I'll have as accurate a handle on time as I need
> via extrapolation from my error graph.
>
> Regards,
>
> Bob
>

   

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