NORTH YELLOW SEA, FROM 140000UTC TO 141000UTC APR， H487 TRIAL VOYAGE IN THE AREA BOUNDED BY:
A： 38-00.0N,121-40.0E；
B： 38-00.0N,122-00.0E；
C： 37-48.0N,122-00.0E；
D： 37-53.0N,121-40.0E.
FROM 141000UTC TO 191200UTC APR， H487 TRIAL VOYAGE IN THE AREA BOUNDED BY:
E：38-28.0N,121-42.0E；
F：38-28.0N,122-25.0E；
G：38-18.0N,121-42.0E；
H：38-08.0N,122-25.0E.
CAUTION TO AVOID.
SHANDONG MSA CHINA.