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Re: Air navigation 1950s-1980s
From: Joshua Carty
Date: 2026 Aug 22, 16:59 -0700

>>I have had great success with a variety of Kollsman periscopic sextants. I have gotten mine off eBay for around $120. I find that the 2-minute averagers, both mechanical clockwork and electronic, work very well but they tend to have dry bubble chambers or degraded pellicles.<<

Thank you, Art Leung! That's very helpful.

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