The Saab 37 Viggen ("Thunderbolt", ambiguous with ‌"Tufted duck") is a Swedish single-seat, single-engine, short-medium range combat aircraft, manufactured between 1970 and 1990. It was the first canard design produced in quantity. Several distinctive variants were produced to perform the roles of strike fighter (AJ37), aerial reconnaissance (SF 37), maritime patrol aircraft (SH 37) and a two-seat trainer. In the late 1970s the all-weather fighter-interceptor aircraft JA 37 was added.