[Paladin2]

+4 hr @ 600 mi/hr -—> 1,000’s of miles.

[dalereed]

“+4 hr @ 600 mi/hr -—> 1,000’s of miles.”

To stay below 18,000’ with the transponder off the airspeed would probably be under 300 mph.

If they were over 18,000 with no transponder would have set off ATC everywhere they flew and would have had intercepter jets after it.

[Bronzewound]

Common Core?