NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A-10 Sextant Maintenance Manual
From: Bill Morris
Date: 2013 Jul 31, 13:43 -0700
From: Bill Morris
Date: 2013 Jul 31, 13:43 -0700
Alcohol will not do for most A10 bubble sextants, which are fitted with vapour pressure bubble chambers, but will work with the A10-A, which have air chambers.
Xylene will have to be used in those few bubble sextants in which the light path of the heavenly body passes directly through the bubble chamber, since the refractive index of xylene is close to that of glass.
Bill Morris
Pukenui
New Zealand
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