BOHAI SEA ，TUG “HAI YANG SHI YOU 677” TOWING “ZHONG YOU HAI 17” PLATFORM FROM BZ19-6-18(38°22′53.519″N；119°10′08.835″E)TO BZ26-5-1(38°15′36.558″N；119°19′06.485″E), FROM 290200UTC JAN.TO 051500 UTC FEB. SPEED 4 KNOTS.LENGTH OF TOWING 520 METERS. CAUTION AND REQUESTED.