BOHAI SEA ， TUG “SHENG LI 291” TOWING “SHENG LI ZUO YE XIN SAN” PLATFORM FROM CB11A（38°12′42.4〞N/118°48′24.2〞E）TO CB273（38°16′9.78〞N/118°50′17.33〞E） FROM 281600 UTC DEC .TO 011600 UTC JAN. SPEED 3 KNOTS.LENGTH OF TOWING 300 METERS. CAUTION REQUESTED. SHANDONG MSA.