NORTH YELLOW SEA, FROM 290000UTC OCT TO 101600UTC NOV, SURVEY CARRIED BY HAOHAI0007 AND HAOHAI0008, IN THE FOLLOWING AREA BOUNDED BY THE LINES JOINING:
A:37-56-31N/121-52-42E；
B:37-55-58N/121-54-50E；
C:37-53-22N/121-54-50E；
D:37-53-31N/121-52-15E.
CAUTION TO AVOID.