The 30 meter long tanker Lady Moon sank just outside of Al Hamriya Port, Dubai.  The tanker sank near the breakwater in 12 meters of water.   The cause of the sinking is unknown, but all five crewmen were rescued.  Officials are concerned that the tanker may cause damage to the breakwater.    There is some concern about pollution, but the Lady Moon had unloaded its cargo of diesel fuel just before it sank.   Authorities are trying to establish who is the legal owner of the vessel.