BOHAI STRAIT,CHANGSHAN CHANNEL,FROM 060000UTC TO 201600UTC JUN,SUBMARINE CABLE MAINTENANCE CARRIED BY CHANGDIAN 1,CHANGDIAN 7,AND CHANGDIAN 16,IN THE AREA BOUNDED BY THE LINES JOINING:
A:37-59-30N/120-52-42E；
B:37-59-46N/120-52-43E；
C:38-00-08N/120-53-59E；
D:37-59-52N/120-53-59E。