BOHAI SEA ，TUG “HAI YANG SHI YOU 677” TOWING “BO HAI 4 HAO” PLATFORM FROM KL10-2-4Sa(37°44′45.809″N; 119°32′06.739″E)TO TIANJIN XINGANG SHIPYARD (38°56′24.33″N; 117°47′8.203″E), FROM 250200UTC JAN.TO 291500 UTC JAN. SPEED 4 KNOTS.LENGTH OF TOWING 544.8 METERS. CAUTION AND REQUESTED.