HB0103 BOHAI SEA FROM 2300UTC TO 1100UTC DAILY FROM 19 AUG TO 13 SEP SEA TRIALS IN AREA BOUNDED BY THE LINES JOINING：
（1）39-54.94N/119-54.05E； （2）39-50.24N/119-52.84E；
（3）39-49.20N/119-59.19E； （4）39-54.15N/120-00.35E.
CAUTION ADVISED. HEBEI MSA CHINA.