HB0012 BOHAI SEA SUBMARINE WORK FOR MV ORION OCEAN IN WEST ANCHORAGE OF QINHUANGDAO PORT FROM 160800UTC TO 161100UTC MAR.ENTERING AND ANCHORING PROHIBITED WITHIN 0.6 MILES RADIUS OF 39-50.92N/119-37.67E. PASS WITH SLOW SPEED. CAUTION ADVISED.HEBEI MSA CHINA.