BOHAI SEA ，TUG “HAI YANG SHI YOU 677” TOWING “HAI YANG SHI YOU 922” PLATFORM FROM KL20-1-4d（37°29′14.995″N;119°12′19.010″E）TO SZ36-2-3(40°09′23.026″N;121°03′10.276″E), FROM 140200 UTC SEP TO 211600 UTC SEP. SPEED 4 KNOTS.LENGTH OF TOWING 507 METERS. CAUTION REQUESTED.