BOHAI SEA, TUG “SHENG LI 253” TOWING “ZHONG YOU HAI 33” DRILLING PLATFORM FROM 40-41.66N 121-58.96E TO 40-40.97N 121-41.15E，AT 221100UTC APR. LENGTH OVERALL 300 METRES SPEED 4 KNOTS. TUG “SHENG LI 253” KEEP WATCH ON VHF CHANNEL 16 AND 69. WIDE BERTH REQUESTED. LIAONING MSA CHINA.