4th Test Department
4-е Испытательное Управление
Military Unit: 12445
Activated 18.3.66 in Plesetsk, Arkhangelsk Oblast, under the Plesetsk Test Center (53rd NIIP).
Department for test & development of solid propellant missiles.
8th independent Engineering & Test Unit (RT-2/15 development)
8th independent Engineering & Test Unit (RT-2/23 development) with 10 silos
2nd independent Engineering & Test Unit (Temp-2S development) with 2 pads
1981 renamed 2nd Scientific Experimental Department (4th NIU).
8th independent Engineering & Test Unit (RT-23 development) with 5 silos
Assembly-line Brigade (military unit: 13991-F) - from 1980
Quality-control and Testing Base (military unit: 35547) - from the 6th Test Department in 1984
1998 disbanded, and absorbed by the Test Center for stationary and mobile missile systems.