BOHAI SEA ，TUG “SHENG LI 291” TOWING "SHENG LI ZUO YE 5 HAO”PLATFORM FROM CACB1D（38°15′12.56″N， 118°48′52″E) TO CACB85(38°16′54.87″N， 118°59′07.51″E) FROM 141600 UTC Dec. TO 251600 UTC Dec. SPEED 3 KNOTS.LENGTH OF TOWING 500 METERS. CAUTION REQUESTED.