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From: Mike Burkes (no email)
Date: Wed Jun 15 2005 - 15:48:02 EDT
Tenths have their places in Lunars and if observer requires surveyor accuracy all on land of course.
Quick correction on my C.Plath description:
You can resolve the measurement to the nearest tenth when two vernier lines on the fixed portion are bracketed by two vernier lines on the rotating drum.
I got it arse-backwards in my first comment.
I can't offer a learned opinion, except to say that in my experience, being able to resolve angles to a tenth of a minute of arc seems to be overkill and perhaps expecting too much of the human eye and brain. I own a C.Plath which takes it to two tenths, but if I really want to, I can resolve it to 1/10th when the two venier lines on the rotating drum are bracketted between two lines on the fixed portion. Sometimes I fool myself and use thi
If I am not mistaken in my recollection, I do believe that Cassens and Plath sextants are graduated in tenths of a minute.
Ok. I have my flak jacket donned. Let 'er rip.....
Robert
----- Original Message -----
From: Mike Burkes
To:
Sent: Wednesday, June 15, 2005 1:18 PM
Subject: Drum Sextants
HI folks, In continuing this thread I posed this question a while back regarding the division of the micrometer minute scale into tenths.
I have always wondered why super quality sextants like some Plaths and others do not have their minute scales further divided into tenths.
I would appreciate any feedback regarding that and thanks much!
Mike Burkes
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