Disclosed herein is an adjustable transfer device for unloading processed crop onto a container of a transport vehicle including a control arrangement with an electronic control unit, among other integrated components. Electronic control unit calculates position of expected point of incidence of crop flow on the container. Further provided is a system that identifies and tracks a target object in image data, which is then used to determine the trajectory of the target. With the trajectory known, the control arrangement can accurately direct the crop flow into the container.