YELLOW SEAM/V “BERGE ARLAS” TRIAL VOYAGE FROM 190000UTC TO 191000UTC MAR IN AREA BOUNDED BY THE LINES JOINING.A:37°37′N,123°17′E; B:37°54′N,123°17′E; C:37°54′N,123°50′E; D:37°37′N,123°50′E,CAUTION ADVISED.