YELLOW SEAM/V “DONGHAI39” TRIAL VOYAGE FROM 280000UTC TO 280900UTC APR IN AREA BOUNDED BY THE LINES JOINING. A:37°38′N,122°00′E; B:37°38′N,122°10′E; C:37°40′N,122°10′E; D:37°40′N,122°00′E,CAUTION ADVISED. SHANDONG MSA CHINA