HB0149 BOHAI SEA SUBMARINE WORK FOR MV WUZHOU6 IN WEST ANCHORAGE OF QINHUANGDAO PORT FROM 0030UTC TO 1130UTC DAILY FROM 13 TO 17 OCT. ENTERING AND ANCHORING PROHIBITED WITHIN 0.3 MILES RADIUS OF 39-44.51N/119-38.74E. CAUTION ADVISED. HEBEI MSA CHINA.