Source : Webster's Revised Unabridged Dictionary (1913)

Rudderless \Rud"der*less\, a.
   Without a rudder.

Source : WordNet®

rudderless
     adj : aimlessly drifting [syn: {adrift(p)}, {afloat(p)}, {aimless},
            {directionless}, {planless}, {undirected}]