YELLOW SEA SEA TRIAL OF “ZHI FEI” IN AREA BOUNDED BY THE LINES JOINING 36-20.98N/120-42.97E、36-32.45N/120-59.31E、36-22.72N/121-12.91E AND 36-11.40N/120-55.40E 0100UTC TO 0900UTC DAILY FROM 20 TO 22 FEB.CAUTION ADVISED.
