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A comment on Seeing stars again: Naval Academy reinstates celestial navigation. Parent comment

Re:Seeing stars again: Naval Academy reinstates celestial na... by Ao7bei3s on Wednesday October 14, 2015 @06:44AM (#10385899)
It has actually been done: the SR-71 Blackbird had one.

https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Astro...

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Re:Seeing stars again: Naval Academy reinstates celestial na... by mikeash on Wednesday October 14, 2015 @09:50AM (#10386571)
Amazingly, it worked during the day (on the ground) too!
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