A spout is pivotally mounted to a transferring material for transferring the agricultural material to the receiving vehicle. An imaging device faces towards the storage portion of the receiving vehicle and collects image data. A container module is adapted to determine a container position of the storage portion, or its container perimeter. An alignment module determines the relative position of the spout and the container perimeter and for generating command data to shift a relative longitudinal alignment between the vehicles in or against a direction of travel of the vehicles when the discharge end of the spout is in misalignment state. An angle sensor is associated with the spout for measuring an observed rotational angle of the spout, wherein the misalignment state means the observed rotational angle is equal to or greater than a rotational angle limit.