FORAGE HARVESTER WITH AUTOMATIC DETECTION OF RECEIVING VEHICLE

A sensor detects a variable indicative of a position of a receiving vehicle relative to a harvester during a harvester operation in which a material conveyance subsystem on the harvester is conveying harvested material to the receiving vehicle. If the receiving vehicle is in a compromised position in which it is out of range of the material conveyance subsystem or is about to be out of range, then a control signal is generated that can alert the operator of the harvester, automatically control harvester speed, or perform other control operations.