Ackshually, the plane is the matter jar. It’s just super uncomfortable for the passengers if the pilot doesn’t get the maneuver just right in the air, so they land and do it there instead. Sometimes they’ll fly along the equator and do it slowly if they’re going across the Pacific, e.g. USA -> Australia, instead of USA -> Chile
Planes have to stop at the equator so everyone can get their matter jars ready to switch before they convert naturally
Ackshually, the plane is the matter jar. It’s just super uncomfortable for the passengers if the pilot doesn’t get the maneuver just right in the air, so they land and do it there instead. Sometimes they’ll fly along the equator and do it slowly if they’re going across the Pacific, e.g. USA -> Australia, instead of USA -> Chile