The 122 meter long, 5758 dwt freighter Helliar suffered damage to its propeller stern tube by a rope while en route to Kirkwall from Aberdeen.   The Helliar was able to continue to Lerwick at reduced speed.  Divers made an inspection and determined the damage could not be repaired at the local facilities.  The Helliar proceeded to Gothenburg where it will go into drydock for repairs.   No reports of injuries or pollution being released.