BOHAI STRAIT，SOUTH OF LAOTIESHAN CHANNEL,2300UTC TO 1100UTC DAILY FROM 10 TO 21 JUN，SWEEPING OPERATION CARRIED BY YEZHIZHENG， IN THE AREA BOUNDED BY THE LINES JOINING
A：38-30N/120-49E；
B：38-27.1N/121-15E；
C：38-20N/121-15E；
D：38-27.3N/120-49E。
WORKBOAT WILL WATCH ON VHF16 CHANNEL，PLEASE CONTACT IN ADVANCE,ADVISED TO AVOID.
SHANDONG MSA CHINA