Lesseee here....GPS ain't fer use in the UK IFR or VFR.....last time I flogged it from the Ekofisk to Teeside.....ummmm.....about 225 nautical miles as I remember....or 245 Nautical if you left the far side of it.....
In those days we had the use of the last remaining Consol station and that wonderful piece of kit known as "That f.......king Decca!" to find our way home. We had our ADF and two VOR's or was just one.....and a very reliable if not hi-tech eyeball that saw through cloud and dark.
Our game plan back then in the event of nav failure (that being defined as losing the all seeing eyeball.....and the ADF) was to descend to visual contact with the water.....assuming visual came before actual......no radalts for us boyo....uh uh.....not us....just a third baralt.....only the Norwegians needed that kind of stuff.
Now the question ShyT....Shytorque.....sorry for the stutter....
What do you use now for an area nav? and......What do yer plans call for if it goes Tango Uniform on you? Do you take yer fancy Pumer to 10,000 feet and holler for radar vectoring?