3A. Seven C.VD ordered from CVM were built as C.VE, as by 1929 it was clear the type was unsuitable as a fighter, but still they were designated J 3B. In 1931, the J 3B were redesignated S 6, the J 3 and J 3A S 6A. Ten C.VE with Nohab My VI engines instead of Jupiter VI engines were given the designation S 6B. The S 6 became the prime liaison aircraft for the Swedish Air Force. It was used for fire spotting, aerial photographing and liaison duty in conjunction with the Army. At the outbreak of World War II, there were 36 aircraft left in service. They would continue until being replaced by Saab 17s from 1942. CVM manufactured 17 S 6 between 1929 and 1932. Some were fitted with floats and designated S 6H. In 1945, the SwAF sold three S 6s to Svensk Flygtjänst to be used for aerial application over forest. Two other were sold to Skåneflyg in 1947. One is preserved and can be seen in the Swedish Air Force Museum. Lieutenant Einar Lundborg rescued the Italian General Umberto Nobile in 1928, with a S 6B, equipped with skis. Nobile was on an ice shelf after his airship Italia had crashed on its way to the North Pole. Switzerland After comparative trials in 1927, Swiss authorities had 48 C.V.-E licence-built in Switzerland for use by the Swiss Air Force (then the Swiss Army Air Corps). 24 machines were built at K+W Thun and 24 at Doflug Altenrhein. The aircraft were in service from 1933 to 1940 and were armed with bombs, two pilot machine guns and a double machine gun for the observer. The Swiss Air Force used their C.Vs as target tugs until 1954, after their retirement from frontline service. Germany During their occupation of Denmark, the Germans seized some Danish Fokker C.V.-Es. Some of these aircraft were used by the Estonian volunteer-manned Nachtschlachtgruppe 11 (Night Ground Attack Wing 11) at Rahkla in 1944. NSGr. 11 used its C.V-Es on the Eastern Front to carry out disruptive harassment night bombing sorties against the Russian front lines. These operations were carried out in response to similar nocturnal operations by Soviet light aircraft, such as Po-2 biplanes. Two of the C.V-Es of the NSGr. 11 were flown to Sweden in October 1944 by four Estonian defectors, and one of them was returned to the Danes