GD0257 SOUTH CHINA SEA M/V “HAI YANG SHI YOU 678” TOWING DRILLING PLATFORM “NAN HAI ER HAO” FROM 20-34-45.58N 113-19-31.60E TO 20-19-10.34N 113-28-53.44E FROM 19 DEC. TO 21 DEC. LENGTH OVERALL 300M TO 600M SPEED 3KN TO 6KN SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED WIDE BERTH REQUESTED GUANGDONG MSA CHINA