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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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