GD0053 SOUTH CHINA SEA DRILLING OPERATION CARRY OUT BY DRILLING PLATFORM “NAN HAI ER HAO” IN AREA WITHIN 1NM RADIUS OF 21-42-48.28N 116-23-06.33E FROM 28 MAR. TO 28 MAY SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED WIDE BERTH REQUESTED GUANGDONG MSA CHINA