BOHAI SEA ，TUG “SHENG LI 291、SHENG LI 242” TOWING “SHENG LI ZUO YE XIN 1” PLATFORM FROM CB12D（N：38°11′53″ E：118°49′28″）TO CBG4A (N：38°18′02″ E：118°53′28″）, FROM 260900 UTC FEB.TO 061600 UTC MAR. SPEED 3 KNOTS.LENGTH OF TOWING 300 METERS. CAUTION REQUESTED.