. . "SON-9"@en . "SON-9 (NATO reporting name Fire Can) is a type of Russian\\Soviet fire director radar for 57 mm and 100 mm anti-aircraft guns. It was widely employed during the Vietnam war."@en . . "SON-9 (NATO reporting name Fire Can) is a type of Russian\\Soviet fire director radar for 57 mm and 100 mm anti-aircraft guns. It was widely employed during the Vietnam war."@en . . .