How do you go from missing in action to missing in Acton?
Most people use GPS to answer the question 'Where am I?' The answer is usually: 'on the M25, two miles from where you were three hours ago'. But we think that's a bit of a waste. So we use it for all kinds of crazy stuff.
Like the F-35's new Autoland system, which can land a jumpjet vertically on to an aircraft carrier in high seas with no help from the pilot. It uses GPS technology to calculate the relative positions of the aircraft and the ship, then transmits steering instructions to the autopilot. It works day and night, in all weathers and means that pilots don't have to make complex manoeuvres, when fatigue is most likely, at the end of a flight.
Of course, if your high-sensitivity GPS is accurate enough to do that, it can also be transformed into a system that boldly goes where no GPS has gone before - indoors. So it can be used to tag home-based prisoners or track police officers when they're following suspects into the deepest, darkest urban jungles.