Jet Airliners Still Navigate With 1920s Radio Tech 0 ▲ James Harding 1 hour ago · Tech · hide · 0 comments An A350 pilot's interactive guide to the radio tech — VOR, DME, NDB, ILS, TCAS — that still guide every flight and take over when GPS is jammed. No comments yet. Log in to reply on the Fediverse. Comments will appear here.