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I just use a spreadsheet, providing one row for each day. On days when I
compare the wristwatch to WWV, I note the error and enter it in the
appropriate column. In my case, the date is in Column A, the error for my
wristwatch is is column B (about every 30 days, although there's nothing
stopping you from entering a reading every day), and the error for the watch
that is in my nav kit is in column C. I use + error numbers to indicate a
watch that's running fast and - error numbers to indicate a watch that is
running slowly. The reason for including all the dates is that when I ask
Excel to make the graph, it needs to know how far apart in time the error
measurements are. I also have Excel print the "best straight line" for the
data points.

Hope this is responsive to your question - let me know if it is not.

Regards,

Bob

> -----Original Message-----
> From: Navigation Mailing List
> [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of The Martins
> Sent: Thursday, January 08, 2004 12:45 PM
> To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
> Subject: Re: Time on a small boat CN
>
>
> How do you do an "error plot"?  I'd like to rate my own watch for a
> transatlantic passage (Newfoundland to Ireland) this July.
> >

   

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