The SR-71 Blackbird Astro-Nav System (aka R2-D2) worked by tracking the stars and was so powerful that it could see the stars even in daylight
The SR-71 Blackbird Astro-Nav System (aka R2-D2) worked by tracking the stars and was so powerful that it could see the stars in daylight
Butch Sheffield Dave Dempster Linda Sheffield Miller Susan Miller Richard Butch Sheffield Jim Watkins
Source: theaviationgeekclub.com