YELLOW SEAM/V “BOTTIGL FRANCO VELA” TRIAL VOYAGE FROM 280600UTC TO 290600UTC SEP IN AREA BOUNDED BY THE LINES JOINING. A:37°38′N,122°00′E; B:37°41′N,122°00′E; C:37°41′N,122°07′E; D:37°38′N,122°07′E,CAUTION ADVISED.CANCEL SD0320.