4 ms·

How did ships navigate 200 years ago? Not sure how accurate it was ? How about using the stars? ... only at night ? Use triangulation to known RF transmissio

How did ships navigate 200 years ago? Not sure how accurate it was ? How about using the stars? ... only at night ? Use triangulation to known RF transmissions ( ie like direction finding of RF signals ) Geography recognition , rivers mountain's . towns etc ( Lidar ? ) Broadcast this info on some other secret frequency - drones only need to listen to the info Use radar to track drone and broadcast its position to the item ...

mshook 1y ago
The B-52 and SR-71 had star tracking systems for that exact reason. Not sure about the B-52 version but the SR-71 worked in daylight. https://www.glennsmuseum.com/items/b52_astro/ https://www.glennsmuseum.com/items/b52_astro/ https://theaviationgeekclub-com.cdn.ampproject.org/v/s/theaviationgeekclub.com/the-sr-71-astroinertial-navigation-system-aka-r2-d2-was-crucial-in-blackbird-mission-heres-why https://theaviationgeekclub-com.cdn.ampproject.org/v/s/theav...
- sroussey 1y ago
  I wonder how satellites affect that now. So many more by an orders of magnitude
  - nullc 1y ago
    They don't. Cloud cover, OTOH, is a real killer-- but not a problem for high altitude aircraft.
mycall 1y ago
I wonder if weather balloons could be cheaply outfitted with star tracking and relay its position back down as a temporary GPS-like backup system.