BOHAI SEA ，TUG “HAIYANGSHIYOU677”TOWING “HAIYANGSHIYOU922” PLATFORM FROM BZ34-1WHPD(N:38°08′28.248″/E:119°31′35.768″)TO BZ19-4WHPB(N：38°22′29.223″/E:119°05′38.572″E) FROM 270200 UTC MAY .TO 051600 UTC JUNE.SPEED 4.5 KNOTS.LENGTH OF TOWING 507 METERS. CAUTION REQUESTED.