Abstract: The rudder comprises a thin, flat rudder vane disposed vertically and arranged for connection at the front end to a trolling line, and for coupling at a rearward point by an included swivel to a leader extending rearwardly to a trailing lure; the rudder vane including a receptacle extending along its lower edge for reception of a selected number of weights to stabilize the vane and control its running depth as well as that of the trailing lure, and a shroud on the upper edge of the vane encompasses the swivel in protective relation without interfering with the normal function of such swivel.