Abstract: A compact assembly of cast parts, in the main of cast aluminum, includes a base structure adapted to be rigidly attached in any desired relation on the stern or beam side of a trolling craft, said structure being multi-functional in that it integrally incorporates (a) an upright tubular support receiving the grip or butt end of the fisherman's rod for instantaneous removal and play when a strike occurs, and (b) an adjustable rigid mount for the usual outboard line pulley supporting rod of a more or less conventional down rigger unit. A hand-operated line spool of said unit is rotatably journaled on a side of the base casting; and further pursuant to the invention said casting has pivoted, on the same side thereof, a manually operated detenting latch member.