Quick Dumb Question

[jmfargo]

If you were to go far back in time, GPS systems would be useless because there are no satellites, correct?

Is there a system, in use today, that can tell you your relative position on the face of the Earth without use of satellites, and not requiring any input from the user?

Comments

[jfargo.livejournal.com]

No, but if you breach the containment unit on the power source of one, and shatter one of the many dylithium crystals, it will send out a tachyon-like wave-pulse.

Wait.

I mean...

I don't know.

[sacramentalist.livejournal.com]

Wait a minute. If you could re-phase the emissions... To the jeffies tubes, Geordi!