HB41/22 BOHAI SEA SUBMARINE WORK FOR MV LEISHENG2 IN EAST ANCHORAGE OF QINHUANGDAO PORT FROM 0030UTC TO 1130UTC DAILY FROM 8 TO 12 MAR. ENTERING AND ANCHORING PROHIBITED WITHIN 0.3 MILES RADIUS OF 39-53.03N/119-42.98E. CAUTION ADVISED. HEBEI MSA CHINA.