BOHAI SEA,TUG "ZHONG YOU HAI 281"TOWING THE DRILLING PLATFORM "ZHONG YOU HAI 9"FROM 39°28.83′N 120°24.38′E TO 38°32.64′N；117°47.00′E ON 18TH APR,LENGTH OVERALL 400 METERS,SPEED 4 KNOTS. CAUTION ADVISED.
