THE Marine Department has had ''fruitful and serious'' discussions on co-ordination of traffic management, search and rescue and licensing of local craft with its Chinese counterparts, according to Director of Marine, Tony Miller. He said the department hosted a four-day visit by the director of the Bureau of Harbour Superintendency of China, Captain Lin Yunai, who led an eight-member delegation. Mr Miller said: ''We want better co-ordination on the timing of vessels leaving Shekou port in the medium term''. Such co-ordination between Shekou and Hongkong would improve safety when vessels negotiated the Ma Wan bend, he said. Under present arrangements, the safety aspect was observed mainly through communication between vessel pilots and operators, he said. Mr Miller said fewer river-trade vessels would transit through the Ma Wan bend when the immigration department set up a new control station.