BOHAI STRAIT，SOUTH OF LAOTIESHAN CHANNEL,2100UTC TO 1100UTC DAILY FROM 24 JUN TO 5 JUL，SWEEPING OPERATION CARRIED BY YEZHIZHENG， IN THE AREA BOUNDED BY THE LINES JOINING
A：38-30N/120-49E；
B：38-23N/121-15E；
C：38-30N/121-15E；
WORKBOAT WILL WATCH ON VHF16 CHANNEL，PLEASE CONTACT IN ADVANCE ,ADVISED TO AVOID.
SHANDONG MSA CHINA