HB20/22 BOHAI SEA SEA TRIALS BY MV JIAOGONG63 FROM 0000 TO 0900 DAILY FROM 21 TO 25 JAN IN AREA BOUNDED BY THE LINES JOINING：
（1）39-55.00N/119-53.70E；
（2）39-50.00N/119-53.70E；
（3）39-50.00N/120-03.00E；
（4）39-55.00N/120-03.00E.
CAUTION ADVISED. HEBEI MSA CHINA.