Blog Editor’s Note: It is all very well to worry about something, but another thing entirely to do something about it. We need to have better receivers in wider use, to be able to detect and stop jamming and spoofing, and to have another system to use if GPS isn’t available. Three pretty straightforward things, but even though everyone agrees “yep we should do that” we have seen darn little action. One bright spot is the US Department of Transportation. They seem committed to getting a terrestrial wireless timing system up and running.