GD0025 SOUTH CHINA SEA DRILLING OPERATION IN AREA WITHIN 1NM RADIUS OF 21-14-45.40N 115-15-23.38E CARRY OUT BY DRILLING PLATFORM “NAN HAI SHI HAO” FROM 6 FEB. TO 6 APR. SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED WIDE BERTH REQUESTED GUANGDONG MSA CHINA