THE HIGH OBLIQUITY (98 DEGREES) IS A REMARKABLE FEATURE OF THE URANUS SYSTEM BOTH OF THE PLANET ITSELF AND THE MAJOR SATELLITES THAT ORBIT IN THE PLANET'S EQUATORIAL PLANE. THE LEADING HYPOTHESIS FOR THE CAUSE OF THIS PROPERTY IS THAT THE PLANET SUFFERED AN OFF-AXIS GIANT IMPACT BY A LARGE BODY (OF ORDER ONE EARTH MASS) SOME TIME AFTER ITS FORMATION. SINCE THE PIONEERING WORK OF SLATTERY ET AL. (1992) TWENTY YEARS AGO THERE HAS BEEN NO MAJOR REINVESTIGATION OF THIS PROBLEM. WE PROPOSE TO CARRY OUT A NEW SET OF SIMULATIONS USING THE SAME METHOD (SMOOTH PARTICLE HYDRODYNAMICS OR SPH) AS SLATTERY ET AL. BUT WITH ONE HUNDRED TIMES BETTER MASS RESOLUTION (10^6 PARTICLES); SPECIFIC PARAMETER COMBINATIONS WILL BE INVESTIGATED WITH UP TO 10^8 PARTICLES. WE WILL EXPLORE A WIDE RANGE OF PARAMETER SPACE AND TEST THE CONCLUSIONS OF THE WORK SLATTERY ET AL. WE WILL TAKE ADVANTAGE OF THE VASTLY HIGHER RESOLUTION TO PLACE ADDITIONAL CONSTRAINTS ON THE PROCESS BY INVESTIGATING POSSIBLE POST-IMPACT SATELLITE FORMATION. ADDITIONALLY WE WILL TEST VARIOUS COMBINATIONS OFPROTO-URANUS STRUCTURE AND COMPOSITION WITH AIM OF CONSTRAINING THE IMPACT IN LIGHT OF PRESENT-DAY KNOWLEDGE ABOUT THE INTERIOR OF THE PLANET.