57th independent Radio-Technical Unit
57-й отдельный радиотехнический узел
Military Unit: 16605
Activated 4.64 in Olenegorsk, Murmansk Oblast.
Consists of complex RO-1 (Early Warning-1) with one 5N15M Dnestr-M (NATO: dual Hen House) radar, and later one 5U83 Daugava radar (receiver).
Contruction of the 5N15M radar began in the spring of 1964, but was soon stopped due to the development phase of the 5N15M radar. Construction would continue from 1965.