NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant calibration. Re: Coordinates on Cook's maps
From: Jim Martin
Date: 2007 Apr 24, 16:24 -0700
From: Jim Martin
Date: 2007 Apr 24, 16:24 -0700
Alex,
My Alpha 40(Chinese)has stamped on the correction certificate
"This instrument is free of errors for practical use"
Jim Martin.
On Apr 23, 4:57 am, Alexandre E Eremenko
wrote:
> On Sat, 21 Apr 2007, Gary J. LaPook wrote:
> > My Tamaya MS-833 serial number 63890 which I bought new in 1981 has all
> > zeros.
>
> Which confirms what I said about the results of my
> e-bay research.
>
> What else, after 1940, except some Tamayas,
> has a certificate
> with all zeros? Can the list members give me ONE example?
> C. Plath and
> Cassens Plath are
> not considered because they DO NOT provide a certificate
> with a list of errors.
>
> I have a wild guess: this depends on whether
> the manufacturer has testing equipment or not:-)
> Freiberger and SNO do have the equipment (I know!),
> so they provide certificates with errors listed.
> They are usually not all zeros.
>
> Alex.
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