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: Gary LaPook
Date: 2007 Apr 21, 23:09 -0700
From: Gary LaPook
Date: 2007 Apr 21, 23:09 -0700
Gary LaPook wrote,
My Tamaya MS-833 serial number 63890 which I bought new in 1981 has all zeros.
alex wrote:
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My Tamaya MS-833 serial number 63890 which I bought new in 1981 has all zeros.
alex wrote:
George, On Apr 20, 7:12 pm, "George Huxtable" <geo...@huxtable.u-net.com> wrote:I don't regard that zero deviation as rendering the instrument any more precise than another calibrated instrument which has non-zero deviations, as long as the navigator, when doing precise work, takes heed of those deviations pasted into the box.A zero-certificate, especially one produced by a reputable independent agency like Kew, is an evidence of high quality workmanship. Lecky, when he gives advise how to buy a sextant says this (I cite by memory): go to the Kew observatory, they usually have many sextants of various brands tested at any time, and look which are the quality brands. Seems very reasonable to me. I add that I've never seen a British sextant of 1940 or later with zero certificate. In fact the only modern sextants WITH a certificate showing all zeros I've seen on e-bay are Tamayas and even these are rare. By "modern" I mean after 1940. Alex.
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