4th independent Engineering & Test Unit

4-я отдельная инженерно-испытательная часть

Military Unit: 25921

Activated 18.4.73 in Leninsk, Kzyl-Orda Oblast, under the 4th Test Department, Baikonur Test Center (5th NIIP).

The units main tasks was missile/complex tests and orbital launches with the UR-500 (Proton) launcher.

US designation: Baikonur Test Center - Launch Complex G (two Type II pads)

Baikonur Test Center - Site 200 (46 02 17N, 63 01 58E)

Baikonur Test Center - Site 201 (46 01 49N, 63 01 45E)

Baikonur Test Center - Site 92 (46 03 29N, 62 56 04E)

HQ at Site 95 (46 03 18N, 62 56 35E).