GD0058 SOUTH CHINA SEA SEISMIC SURVEY CARRY OUT BY M/V “HAI YANG SHI YOU 721” IN AREA BOUNDED BY 20-03-57.5N 115-05-51.5E，20-08-55.4N 115-14-40.1E，19-44-36.9N 115-31-16.6E AND 19-39-40.7N 115-22-59.7E FROM 1 APR. TO 10 MAY THE VESSEL TOWING 10 CABLES LENGTH 7050M 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