3 decal variants:
1. Arado Ar 66C, PF+BG, LNS 2, 1941
2. Arado Ar 66C, D-IRYL, RLM Team, Deutschlandflug, 1935
3. Arado Ar 66C, DK+JM, unknown training unit
It was also used for night ground-attack missions on the Eastern Front. The crew consisted of two: instructor pilot and trainee, seated in open tandem cockpits equipped with dual controls and aircraft was equipped with instrument flight systems with photographic cameras were mounted as optional equipment.