https://theaviationgeekclub.com/heres-why-r2-d2-the-sr-71-astroinertial-navigation-system-was-essential-for-blackbird-mission/
Oct 9, 2022 - Here’s why R2-D2, the SR-71 Astroinertial Navigation System, was essential for Blackbird mission
navigation systemsrastroinertial