 The VGO.I was built for the Marine-Fliegerabteilung (Imperial German naval Air service) and served on the Eastern Front Later modified with two extra engines, it crashed during tests at Staaken.A similar machine, the VGO.II was also used on the Eastern Front.Baumann was an early expert in light-weight construction techniques and placed the four engines in nacelles mounted between the upper and lower wing decks to distribute the loads to save weight in the wing spars.