Thread: What is this flight instrument???
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Old 04-27-2010, 09:18 PM
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Bloodhound
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Joined APC: Jul 2006
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After some quick research, it appears to be an LHA Aries calculator/instrument - used for celestial navigation. LHA is Local Hour Angle.

http://www.usps.org/eddept/n/files/lha_calculator.pdf
Celestial Navigation Basics
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