Read the Ops Group report. It is a very real problem. They explain it clearly. Many highly qualified people are concerned about GPS spoofing. (Ops Group is a p

Read the Ops Group report. It is a very real problem. They explain it clearly. Many highly qualified people are concerned about GPS spoofing. (Ops Group is a professional group for international pilots, flight planners, or, as they say, people who have a callsign or answer the phone "Ops".)