云航警0021，黄海南部，4月13日1200时至4月14日1800时在34-01.08N/120-20.88E、34-28.87N/120-30.53E、34-25.80N/120-45.77E、33-21.83N/120-47.95E四点连线范围内有影响船舶航行安全的活动，禁止驶入。

LYG0021，SOUTH YELLOW SEA THERE ARE ACTIVITIES THAT AFFECT THE SAFATY OF SHIP NAVIGATION FORM 130400UTC APR TO 141000UTC APR IN AREA BOUNDED BY THE LINES JOINING 34-01.08N/120-20.88E、34-28.87N/120-30.53E、34-25.80N/120-45.77E、33-21.83N/120-47.95E ENTERING PROHIBITED. LIANYUNGANG MSA CHINA.