BOHAI SEA ，TUG “HAI YANG SHI YOU 677” TOWING “ZHONG YOU HAI 17” PLATFORM FROM BZ34-1WHPB(38°08′18.273″N；119°34′40.429″E)TO BZ19-6-18（38°22′53.519″N；119°10′08.835″E）, FROM 231000 UTC OCT TO 301500 UTC OCT. SPEED 4 KNOTS.LENGTH OF TOWING 520 METERS. CAUTION REQUESTED.