BOHAI SEA,FROM 010000UTC TO 051600UTC MAY,DREDGING OPERATING BY SHUN YANG DE FAN 1 HAO,IN AREA BOUNDED BY 1:38°05′41.44″N、118°58′41.66″E; 2:38°05′40.19″N、118°58′45.39″E; 3:38°05′31.07″N、118°58′40.53″E; 4:38°05′32.32″N、118°58′36.80″E; CAUTION ADVISED.