HB0027 BOHAI SEA SEA TRIALS BY SHIP QIMAOTING16 2300UTC TO 0700UTC DAILY FROM 20 TO 23 MAY IN AREA BOUNDED BY THE LINES JOINING:
（1）39-55.0N/119-53.7E； （2）39-50.0N/119-53.7E；
（3）39-50.0N/120-03.0E； （4）39-55.0N/120-03.0E；
OPERATING CHANNEL 71. CAUTION ADVISED. HEBEI MSA CHINA.