The 46 meter long, 907 dwt coastal freighter Tra Ly 18 sank in the Gulf of Tonkin near Vinh, Vietnam.   The freighter was en route to Quang Ngai from Hai Phongwith 500 tons of bulk cement when it suffered water ingress.   The crew was unable to stop the flooding and sent out a distress call.   A nearby freighter, Hoang Vu 1, responded and rescued all crewmen from the Tra Ly 18.   No reports of injuries.   There are conflicting reports to number of crew reported on board the Tra Ly 18 (8 to 18 persons).