BOHAI SEA, WEST OF CHANGSHAN CHANNEL, FROM 281600UTC AUG TO 101600UTC SEP, SEISMIC SURVEY CARRIED BY HAIYANGSHIYOU 720, IN THE AREA BOUNDED BY THE LINES JOINING:
A:38-16-04N/119-53-52E;
B:38-06-14N/120-16-45E;
C:38-00-00N/120-11-58E;
D:38-10-26N/119-49-14E。
WORKBOAT WILL WATCH ON VHF16 CHANNEL, PLEASE CONTACT IN ADVANCE, ADVISED TO AVOID.