In one recent report received by OPSGROUP, a disruption caused an aircraft to veer, unplanned, into Iranian airspace.

If there’s one thing most of us take for granted in boarding a commercial aircraft, it’s that the plane is headed where we expect it to go. If you’re flying from New York to Miami, it should be safe to assume the plane will land in South Florida.

But in recent months there have been some concerning headlines about issues with aircraft navigation systems in some parts of the world.

This fall the aviation organization OPSGROUP has sounded the alarm about apparent disruptions to such systems that, like the GPS on your phone, rely on satellites orbiting the earth to provide precise time and location information in the cockpit.

The reports detail recent “jamming” incidents that have confronted pilots. Imagine if your car’s GPS system just stopped working all of a sudden—but this is a commercial aircraft.

Perhaps more troubling, the group has also received reports of “spoofing” incidents where pilots essentially receive bogus, incorrect GPS information in their nav systems. That would be like your car’s GPS system telling you you’re on one road when, in fact, you’re on another altogether.