BOHAI STRAIT，NORTH OF TUOJI ISLAND,2200UTC TO 1100UTC DAILY FROM 10 JUL TO 10 AUG，SWEEPING OPERATION CARRIED BY YEZHIZHENG， IN THE AREA BOUNDED BY THE LINES JOINING
A：38°24′10″N，120°36′00″E；
B: 38°24′10″N，121°04′00″；
C:38°13′10″N，121°04′00″；
D:38°13′10″N；120°36′00″。
WORKBOAT WILL WATCH ON VHF16 CHANNEL，PLEASE CONTACT IN ADVANCE ,ADVISED TO AVOID.
SHANDONG MSA CHINA