Inertial Navigation Systems
Comments debate GPS alternatives like inertial navigation systems (INS), dead reckoning, star trackers, and gyroscopes, focusing on error accumulation, calibration needs, and applications in aircraft, vehicles, and missiles.
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navigate by stars and moon and position of the sun vs chronometers vs gps?
Maybe they are using GPS bearing with gyro compensation?
It's not dead reckoning, it's continually fixing to a map.
Sounds like inertial navigation to me.
you don't need an initial heading measurement but you still need to know where you are
I did a Ctrl+F and it doesn't mention once Inertial Navigation Systems (INS)[1]?As long as an external signal for navigation is used, the problems of external signals will remain. INS doesn't suffer from this issue and is already used in planes, ships, cars and phones for years. Actually I miss INS in cycling computers, it could fix so many issues.[1] https://en.
I thought most airplanes have Inertial Navigation Systems with GPS for occasional calibration when the INS drifts.
That sounds like inertial navigation with nav fixes, which predates GPS. It certainly does exist.
Is that really true? INS/inertial navigation systems accumulate errors over time, GPS is still required for them, its not a replacement?
it probably has both gyroscopes and star-charts for navigation.