Interesting...................... Having used ADF in anger only twice in 10,000 hours of European flying I have to question why we have it, a bit of back up is all I can think of................... apart from being able to get the cricket scores!
However I would like to see the CAA get there act together on the requirement to have ADF for flight in controlled airspace, a number of American airlines flying into the UK don't have ADF and yet they still fly in UK class A airspace. In fact this is one of the reasons that LGW was one of the first places to get a GPS approach!
It seems a little strange that an American airliner can fly in UK class A airspace without ADF yet a British airliner cant.
Can only think this is the result of the ex-navigators still reminiscing in the aviation house canteen about the days of the HP Hastings and trips up the north sea from Finningley.