YELLOW SEA, FROM 020200UTC TO 051600UTC APR,TUG BEIHAIJIU 101 TOWING HAVFARMI,FROM YANTAI PORT（37-35-30N/121-24-06E） TO TRIAL VOYAGE AREA , LENGTH OVERALL 990 METERS, SPEED 3 KNOTS.
THE TRIAL VOYAGE AREA IS BOUNDED BY THE LINE JOINING
A: 37-57-30N/121-40-00E；
B: 37-57-30N/121-48-00E；
C: 37-53-30N/121-48-00E；
D: 37-53-30N/121-40-00E。
CAUTION ADVISED.