Quantum Compass UK's Imperial College London and technology company M-squared, have developed the world's first commercially viable quantum technology. The device uses powerful lasers to supercool atoms, at which point they begin to display quantum properties and act simultaneously as both particle and wave. The device, placed in a moving object (ship, train, vehicle) causes the quantum atoms to move, and the displacement is then measured with a highly sensitive interferometer serving as an optical ruler. The resulting precision allows the device to give readings that maintain position accuracy for far longer than the best accelerometers on the market today. Further development and standardization of the technology would remove our dependency on GPS which relies on satellite signals.

https://phys.org/news/2018-11-quantum-compass-satellites.html