"Same."  He gets out of his chair and goes to the cabinet with the spiral notebooks full of auxiliary info.

Their previously planned route will take them way too close to populated cities for this to be in any sense okay for an airplane that has lost all comms and maybe its transponder to do.  So before the plane set out, as a matter of routine, a computer generated previously planned routes the flight could shift to in case of an exception that caused them to lose all comms--presumably in some less mysterious way; a route that would take them to a failover emergency landing field on a flight path that did not scare any skittish major cities or nuclear power plants.  The airplane will turn into that alternate corridor at a predictable exact clock time, based on when the emergency started; such that anyone who knew when the airplane transponder failed would be able to predict exactly when they'd turn into the alternate corridor and exactly where they'd be even without using satellite surveillance info.

"Same."  He gets out of his chair and goes to the cabinet with the spiral notebooks full of auxiliary info.

Their previously planned route will take them way too close to populated cities for this to be in any sense okay for an airplane that has lost all comms to do.  So before the plane set out, as a matter of routine, a computer generated previously planned routes the flight could shift to in case of an exception that caused them to lose all comms--presumably in some less mysterious way; a route that would take them to a failover emergency landing field on a flight path that did not scare any skittish major cities or nuclear power plants.  The airplane will turn into that alternate corridor at a predictable exact clock time, based on when the emergency started; such that anyone who knew when the airplane transponder failed would be able to predict exactly when they'd turn into the alternate corridor and exactly where they'd be even without using satellite surveillance info.

"Same."  He gets out of his chair and goes to the cabinet with the spiral notebooks full of auxiliary info.

Their previously planned route will take them way too close to populated cities for this to be in any sense okay for an airplane that has lost all comms to do.  So before the plane set out, as a matter of routine, flight control printed backup routes the flight could shift to in case of an exception that caused them to seem unsafe; a route that would take them to a failover emergency landing field on a flight path that did not scare any skittish major cities or nuclear power plants.

The airplane will turn into that alternate corridor at a predictable exact clock time, based on when the emergency started; such that anyone who knew when the airplane transponder failed would be able to predict exactly when they'd turn into the alternate corridor and exactly where they'd be, even without using satellite surveillance info.

"Same."  He gets out of his chair and goes to the cabinet with the spiral notebooks full of auxiliary info.

Their previously planned route will take them way too close to populated cities for this to be in any sense okay for an airplane that has lost all comms to do.  So before the plane set out, as a matter of routine, flight control printed backup routes the flight could shift to in case of an exception that caused them to seem unsafe; a route that would take them to a failover emergency landing field on a flight path that did not scare any skittish major cities or nuclear power plants.

The airplane will turn into that alternate corridor at a predictable exact clock time, based on a broad time window for when the emergency started; such that anyone who knew roughly when the airplane transponder failed would be able to predict exactly when they'd turn into the alternate corridor and exactly where they'd be, even without using satellite surveillance info.

"Same."  He gets out of his chair and goes to the cabinet with the spiral notebooks full of auxiliary info.

Their previously planned route will take them way too close to populated cities for this to be in any sense okay for an airplane that has lost all comms to do.  So before the plane set out, as a matter of routine, Air Traffic Control printed backup routes the flight could shift to in case of an exception that caused them to seem unsafe; a route that would take them to a failover emergency landing field on a flight path that did not scare any skittish major cities or nuclear power plants.

The airplane will turn into that alternate corridor at a predictable exact clock time, based on a broad time window for when the emergency started; such that anyone who knew roughly when the airplane transponder failed would be able to predict exactly when they'd turn into the alternate corridor and exactly where they'd be, even without using satellite surveillance info.