Source : Webster's Revised Unabridged Dictionary (1913)

Wheelhouse \Wheel"house`\, n. (Naut.)
      (a) A small house on or above a vessel's deck, containing
          the steering wheel.
      (b) A paddle box. See under {Paddle}.

Source : WordNet®

wheelhouse
     n : an enclosed compartment from which a vessel can be navigated
         [syn: {pilothouse}]