A college friend of mine who was at the Air Force Academy in the 1980s told me s... | Hacker News

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		PaulHoule on Sept 25, 2023 \| parent \| context \| favorite \| on: The SR-71 Blackbird Astro-Nav System worked by tra... A college friend of mine who was at the Air Force Academy in the 1980s told me she was trained in celestial navigation in case they needed it in a pinch. Both of us were pretty interested in the math.

mrguyorama on Sept 26, 2023 [–]

Older 737s have "Eyebrow" windows and mounting points for sextants for backup navigation.

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