The prototype Daryal receiver is called a Daugava (5U83) and works with a Dnestr-M transmitter. It is half the size of the Daryal receivers but has the same equipment and computer systems. The original Daryal (5N79) was improved by revisions Daryal-U (90N6) and Daryal-UM. A Daryal-U had half the transmitters of a Daryal. The Volga radar (70M6) is a Daryal-like radar operating on a decimeter wavelength (UHF) rather than the meter wavelength (VHF) of the Daryal. It was originally planned that there would be a number of these to complement the Daryal. The only Volga built is the one at
Baranavichy which originally started in 1982, stopped in the early 1990s, restarted in 1999 and became operational in 2003. File:Daryal Pechora radar concept.jpg|A US military artist's concept of a Daryal facility - transmitter on the left, receiver on the right File:Daryal radars planned.png|Planned and operational Daryal radars File:Mukacheve Daryal-UM LPAR 02.jpg|Ruin of Daryal-UM radar at
Mukachevo Radar Station, Ukraine (2003) == Locations ==