GD0178 SOUTH CHINA SEA DRILLING OPERATION BY DRILLING PLATFORM “HUA DONG YUAN 306” IN AREA BOUNDED BY 22-37.08N 116-54.66E，22-52.14N 117-14.16E，22-24.42N 117-59.52E，22-18.96N 117-46.50E，22-17.40N 117-34.50E AND 22-14.58N 117-00.72E FROM 4 SEP. TO 31 DEC SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED ADVISED TO AVOID GUANGDONG MSA CHINA