The 114 meter long, 6802 dwt tanker Mar Cristina suffered an explosion while moored at Sandefjord, Norway.   The explosion occurred in the forward section of the tanker while it was loading a cargo of sludge.   The Mar Cristina suffered damage to it’s deck and hull.   No reports of injuries, but one crewman was taken to hospital to be checked out.   An investigation into the cause of the explosion is being conducted.