To exploit theoretical advances in elastic wave inverse scattering, an automated multiviewing ultrasonic transducer system and associated signal processing algorithms have recently been developed for the characterization of flaws in solids. The reliability of the model-based reconstruction method depends on the extent of the flaw surface illuminated by the interrogating ultrasonic field within a finite viewing aperture and is therefore sensitive to the orientation of the flaw. In this paper, the reconstruction of arbitrarily oriented flaws using the multiviewing system is addressed. The effects of aperture size on the reconstruction reliability is investigated by computer simulation and experimental results are presented for the reconstruction of tilted oblate and prolate spheroid-like flaws. The multiviewing capability of the system is used to predetermine a spatial data acquisition pattern which improves the reconstruction reliability by increasing the signal-to-noise ratio and the surface area of the flaw illuminated by the multiviewing transducer.