NORTH YELLOW SEA,FROM 150600UTC TO 211600UTC OCT,JINGLU251 TRIAL VOYAGE IN THE AREA BOUNDED BY: A:38-30N/121-50E; B:38-16N/121-50E; C:38-16N/122-00E; D:38-30N/122-00E. CAUTION TO AVOID. SHANDONG MSA CHINA.