Great to know that if my highly reliable GPS which has never failed me in years - or ever for that matter - is switched off by the Americans, or just plain fails, I can use an NDB to precisely fly through thunderstorms etc.
What a joke! The GPS has proved itself to be a real boon to navigation, and I am amazed eminent people, including CAA folk, keep on about how potentially unreliable it is. Surely all our aids are potentially unreliable, and none of us would hang our lives on one aid.
As for the US shutting it down, this is not likely to happen without notice, as there are thousands of aircraft in American airspace using GPS, nearly all as their primary aid, and the US wouldn't forget that.
As for the requirement to still have an ADF and DME fitted in UK airspace if one wishes to fly airways - why? GPS can deal with both far easier. OK, if one is going to make use of an NDB as an approach aid, that is fair enough, but there ain't so many of these around now. Could someone please tell the CAA?