BOHAI SEA ， TUG “HAI YANG SHI YOU 677” TOWING “HAI YANG SHI YOU 923” PLATFORM FROM BZ34-1N-9Sa（38°09′53〞N/119°30′11〞E）TO BZ34-1N-10d（38°09′17〞N/119°28′56〞E）FROM 200400 UTC DEC .TO 011600 UTC JAN. SPEED 4 KNOTS.LENGTH OF TOWING 550 METERS. CAUTION REQUESTED. SHANDONG MSA.