NORTH BOHAI SEA TUG SHENG LI 291 TOWING BO HAI ZI LI HAO DRILLING PLATFORM FROM 39-59.88N 120-48.90E TO 37-48.67N 119-37.52E AT 052230UTC MAY LENGTH OVERALL 350 METRES SPEED 4 KNOTS VIA 39-49.07N 120-34.26E,39-09.84N 120-16.52E,39-03.92N 119-52.21E.WIDE BERTH REQUESTED.LIAONING MSA CHINA.