TJ47/21 TIANJIN HARBOUR THE MARITIME SEARCH AND RESCUE EXERCISES FROM 190200UTC TO 190400UTC AUG IN AREA BOUNDED BY 1)38-56.66N 117-46.43E; 2)38- 57.06N 117-46.60E; 3)38-56.18N 117-49.61E; 4)38-55.80N 117-49.48E.ADVISED TO AVOID. TIANJIN MSA CHINA.