 From early 1943 the Typhoons also had a yellow, stripe on each of the upper wings, centred on the inner cannon.All of these markings were officially abandoned 7 February 1944.The late-war specialized all-jet Luftwaffe fighter squadron, Jagdverband 44, possessed a number of Fw 190 D piston-engined fighters to protect their units' Messerschmitt Me 262 jet fighters during the jets' takeoff and landing operations, as the jets were most vulnerable to Allied piston-engined fighter attack at those times.