OK-MT was built in Moscow in 1983 for technological developments, the transport documentation development and loading of the gas tanks, the hermetic systems of safety, the entry and the exit of the crew, the development of the military operations, the maintenance and the flight manuals.
After these tests it was renamed in OK-ML-2 and was transported at Baïkonour by the VM-T plane, and was used to test the operation of the interfaces systems with Energia. Initially it would have been used for the second flight of Energia and also burned in the atmosphere. As it older sister OK-ML-1 it resides now at Baïkonour, but is sheltered in MZK building near the Ptitcka shuttle (building 80, Area 112A).
