NORTH YELLOW SEA, FROM 0000UTC TO 1000UTC DAILY FROM 14 TO 20 APR，JINGLU157 TRIAL VOYAGE IN THE AREA BOUNDED BY THE LINE JOINING :
A:38-30N/121-50E;
B:38-16N/121-50E;
C:38-16N/122-00E;
D:38-30N/122-00E.
CAUTION ADVISED.
SHANDONG MSA CHINA