TatankaTruck t1_j9h88h5 wrote on February 21, 2023 at 11:22 PM Reply to TIL The Lockheed SR-71 Blackbird used an Astro-inertial Navigation System to track Stars and determine its position and altitude. At Mach 3, the navigation system was accurate enough to limit drift to 1,000 feet (300 meters) off course. by shamelessterminator I see Blackbird I have to post this. Great story. https://youtu.be/8AyHH9G9et0 Permalink 2
TatankaTruck t1_j5ms083 wrote on January 24, 2023 at 2:37 AM Reply to Cherokee Falls, Georgia, USA (OC) [4000x6000] by OscarTheTiger If you can time it a day or two after heavy rains it is unreal. Last time we were there I could not believe how it was flowing. Permalink 1
TatankaTruck t1_j9h88h5 wrote
Reply to TIL The Lockheed SR-71 Blackbird used an Astro-inertial Navigation System to track Stars and determine its position and altitude. At Mach 3, the navigation system was accurate enough to limit drift to 1,000 feet (300 meters) off course. by shamelessterminator
I see Blackbird I have to post this. Great story.
https://youtu.be/8AyHH9G9et0