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From: Rodney Myrvaagnes (no email)
Date: Sun Oct 05 2003 - 01:44:51 EDT
On Sat, 4 Oct 2003 10:09:17 -0500, Courtney Thomas wrote:
>Greetings !
>
>What are the options, if any, regarding using a sextant lacking the
>manufacturer's non-adjustble error information ?
>
>Can these non-adjustable errors be determined by someone else ? Who ?
>
>How accurate a fix can be obtained ?
>
>Can it be safely used for serious navigation ?
>
What do you consider "serious navigation?" A lifeboat sextant will get
you within piloting range of mid-ocean island groups, like Bermuda or
the Azores. A C.Plath won't get you into a fog-bound harbor.
The errors on my Kelvin and Hughes are:
30 deg +10"
60 deg +10"
90 deg 0"
120 deg -30"
These are small compared to the errors from the motion of a small boat,
36 feet in my case. If you are taking sights o an aircraft carrier they
might be taken into acount.
HTH
Rodney Myrvaagnes J36 Gjo/a
For your upscale SUV: Dingle-balls hand knit of natural Icelandic yarn
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