Abstract: A system for assisting in navigation operation of moving objects on a predefined track is disclosed comprising a plurality of first infrared light emitters for emitting infrared light over a first range of wavelengths in restricted angles of radiation, and a plurality of a second infrared light emitters for emitting infrared light over a second range of wavelengths in restricted angles of radiation, where the first and second ranges are at least partially non-overlapping, said first and second infrared light emitters are placed in respective positions to a guide way in groups with respective angles of radiation, set such that a first set of infrared light patterns of combined groups of first and second wavelengths are visible for a controller by means of a infrared light vision system at the moving object, when the moving object matches the track, and that one or more second sets of infrared light patterns of combined groups of first and second wavelengths are visible for the controller, when the position of

Abstract: A petrol-tank flap arrangement for a motor vehicle has a pivotably mounted petrol-tank flap which is retained in its closed position by a locking device. The petrol-tank flap is assigned a driving device which enables the petrol-tank flap to automatically swing open into its refuelling position after the locking device is released.

Abstract: A petrol-tank flap arrangement for a motor vehicle has a pivotably mounted petrol-tank flap which is retained in its closed position by a locking device. The petrol-tank flap is assigned a driving device which enables the petrol-tank flap to automatically swing open into its refuelling position after the locking device is released.