This maneuvering unit was constructed for training purposes only, and is of the same dimensions and weight as the one that was flown on the Gemini 9 mission in June 1966. However, the unit was not tested on Gemini 9 due to Eugene Cernan having to return to the spacecraft ahead of schedule. The jet-powered devices were not actually used during spacewalks until the Space Shuttle program.
NASA transferred this device to the Museum in 1970.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.