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Old 08-11-2006, 12:38   #16
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Location: Kea'au, Big Island, Hawaii
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Aloha Dave,
RSN got one of my 25s.
Still have a couple of Mark 15s.
Regards, JohnL
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Old 06-01-2009, 21:52   #17
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One can certainy navigate with plastic sextants, the Davis Mark 15's and 25's being examples thereof. Watch out for "wandering index errors" though, as well as "instrument errors", which as I understand, are not easily determined, or certified as they are with metal sextants.

They, the plastic type, cost a whole lot less, and for a beginner or one who hasn't made up their mind, are something to consider. You can always upgrade later, and should you opt not to bother, you haven't put a lot of money into what might becone an interesting paper weight.
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