Foxmoth - I am not yanking anyones chain! I was just having trouble rationalizing two seemingly paradoxical statements.
Ok, in that case very happy to have helped, as is often said, there is no such thing as a stupid question, but sometimes when people do not understand you do wonder - always easier actually explaining face to face because you then understand more what they are failing to get a grasp of.
Hopefully you now understand that the aircraft is in the body of air BOTH on the ground
and in the air and in many ways it does not matter where it is.