GD0144 SOUTH CHINA SEA SEISMIC SURVEY BY M/V “HAI YANG SHI YOU 721” IN AREA BOUNDED BY 21-12-18.0N 113-35-45.0E，21-26-28.0N 114-01-36.6E，20-43-12.0N 114-27-46.5E AND 20-27-23.0N 114-03-15.0 E FROM 20 JUL TO 30 OCT. THE VESSEL TOWING 10 CABLES LENGTH 6000M WITH YELLOW VISUAL BUOY AT EACH CABLE END FLASHING WHITE LIGHT AT NIGHT SPEED 4.5KN SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED CROSSING THE CABLES AREA PROHIBITED GUANGDONG MSA CHINA