HB38/22 BOHAI SEA SUBMARINE WORK FOR MV ZHONGHUI76 IN WEST ANCHORAGE OF QINHUANGDAO PORT FROM 0030UTC TO 1130UTC DAILY FROM 1 TO 5 MAR. ENTERING AND ANCHORING PROHIBITED WITHIN 0.3 MILES RADIUS OF 39-49.50N/119-37.69E. CAUTION ADVISED. HEBEI MSA CHINA.