There are a lot of these on display it seems. The one we saw was on display was ... | Hacker News

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		le-mark on Sept 25, 2023 \| parent \| context \| favorite \| on: The SR-71 Blackbird Astro-Nav System worked by tra... There are a lot of these on display it seems. The one we saw was on display was at the SAC museum outside of Omaha.

westurner on Sept 26, 2023 [–]

The SAC Museum Wikipedia page links to the website page on this craft: https://en.wikipedia.org/wiki/Strategic_Air_Command_%26_Aero... https://www.sacmuseum.org/what-to-see/aircraft/sr-71a-blackb...

Quantum navigation systems could also determines position from quasi-stable astral signal sources FWIU. https://news.ycombinator.com/item?id=36222625

Sunstone: https://en.wikipedia.org/wiki/Sunstone_(medieval)

Amplituhedra and cost of calculation: https://en.wikipedia.org/wiki/Amplituhedron

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