In seismic acquisition (when you acquire "pictures" of the subsurface, much before the drilling part) you need accurate positioning of your sources & sensors.

In seismic acquisition (when you acquire "pictures" of the subsurface, much before the drilling part) you need accurate positioning of your sources & sensors. https://en.wikipedia.org/wiki/Reflection_seismology https://en.wikipedia.org/wiki/Reflection_seismology