BOHAI SEA ，TUG “SHENG LI 291” TOWING “SHENG LI ZUO YE SI HAO” PLATFORM FROM ：CB251B（38°14′03.26″N，118°50′41.31″E）TO CB11H（38°13′40.17″N，118°48′02.58″E） FROM 250300 UTC Jan. TO 051600 UTC Feb. SPEED 3 KNOTS.LENGTH OF TOWING 300 METERS. CAUTION REQUESTED.