A docking aid (1) for use in lining up a vehicle to a trailer comprises a first rod (4) attached to the vehicle which is aligned with a second rod (104) attached to the trailer so that the vehicle can be positioned correctly for hitching the trailer to the vehicle. A further method of providing attachment means is to use a galvanised plate which is positioned about or underneath the tow-ball, and which has connective means for the housing means or has the housing means as an integral part of the plate. Markings on the indicator means may also be provided to mark the heights of the ball and the hitch, and so enable corrrect spatial alignment between the two.
