BOHAI STRAIT, TUG DELAI TOWING ZHIFUDAO, FROM YANTAI 37-33.36N 121-27.74E TO DONGYING 38-18.90N/119-37.66E, FROM 241600UTC TO 261600UTC AUG, LENGTH OVERALL 400 METERS, SPEED 4 KNOTS.CAUTION TO AVOID.
