The old mechanical instruments that I learned to fly with didn’t have those problems.
Tune it up a little and you can make the pilot unaware of crossing the Iranian border. Then Iran can force the plane down and ransom the passengers for the current going rate of $1.2 billion per hostage. (Thanks, Joe)
Jets used to navigate just fine using inertial navigation, which is immune from external interference. GPS supplements inertial navigation by correcting sensor drift. Aircraft used to use other electronic navigation aids, like VOR DME, and LORAN to supplement inertial navigation, but with the advent of GPS a lot of electronic aids are going away. There are a number of satellite navigation systems, and one might think that commercial aircraft would employ as many independent checks as possible.
BTW, it is not easy, almost impossible, to spoof military GPS codes, which are encrypted and transmitted at different frequencies with more power than the civilian codes. Civilian GPS only gets about 10% of the power and precision of military GPS.
Spoofing my arse. If it is the Iranians, it is an act of war.
The C-130, among other military aircraft, used to come with a sextant port. But that’s no longer the case and celestial navigation on aircraft is now a lost art.
““A troubling new development in enroute airspace is emerging: Aircraft are being targeted with fake GPS signals”
...and people why our HIMARs in Ukraine are now turning back and taking out Ukrainian positions. It doesn’t take a Rocket Scientist to know that GPS and be jammed and Spoofed, but it does take people more educated that the Affirmative Action hires at DOD to understand it.
Gosh! How on earth were my wife and I able to navigate from interior Alaska to central Florida, up to New England and back home across subarctic Canada without a GPS back in 1985?