O.Thetford, P.Gray German Aircraft of the First World War (Putnam)

Germania C IV 1918
   Developed especially as an advanced C (Schulflugzeug) school machine during 1918, this machine unusually featured a single cockpit to accommodate both instructor and pupil. It was otherwise a conventional aircraft of wood and fabric with ply-covered fuselage and vertical fin. Only one machine built. Engine, 120 h.p. Argus As II.

M.Dusing Germania Flugzeugwerke and its Aircraft (A Centennial Perspective on Great War Airplanes 41)

Germania C.IV Unarmed Trainer

   In the last year of the war another two-seater C-type airplane was developed as training aircraft. In contrast, the Germania C.I/II/III prototypes were relatively streamlined designs powered by the newest high-altitude engine, the 260 hp Maybach. These powerful aircraft were clearly intended to be high-performance combat aircraft, whereby the C.IV with its 180 hp Argus As III engine was less powerful and therefore not intended to be used in combat. Germania had to use the Argus engine because there were not enough reliable Mercedes D.III engines available. Like its predecessors, the C.IV was generally designed as a biplane with two-bays of parallel struts, wooden construction, radiator in front of upper wing, and a common seat cut-out.
   This aeroplane was tested under the designation Germania C.IV by the Inspektion des Flugzeugwesens in Berlin-Adlershof. The test results were satisfactory but demonstrated significant omissions. The Army Administration would possibly have taken over the Germania C.IV into the service if the Germania Flugzeugwerke had been able to eliminate all identified deficiencies. However, a final decision was not reached due to the end of the war.
   Therefore, only one example of this aircraft type was built.