NORTH YELLOW SEA, FROM 070600UTC TO 131500UTC JAN， JINGLU252 TRIAL VOYAGE IN THE AREA BOUNDED BY:
A:37-50.3N/120-24.0E；
B:37-52.5N/120-24.0E；
C:37-52.5N/120-28.0E；
D:37-50.3N/120-28.0E.
CAUTION TO AVOID.
SHANDONG MSA CHINA.