A terminal phase ballistic missile defense system rather than a missile or other component of it, the Russian A-135 is a two-layer anti-ballistic missile defense for the Moscow area. It uses the 51T6 for intercepts above the atmosphere, and the 53t6 short-range missile inside the atmosphere. These missiles are known, in the West, as the ABM-4 GORGON and ABM-3 GAZELLE.
Officially, the A-135 system remains operational, but it is really obsolete and could easily be overwhelmed by a U.S. strike. Under the ABM Treaty, a nation could protect its command center or a missile field; the USSR chose to protect Moscow. There may be matters of prestige and internal politics involved in not decommissioning the system.
- Don-2N Pill Box early warning radar, range 6000 km.
- Hen House early warning radar, VHF band, range 6000 km.
- Daryal early warning radar, range 5000 km.
- Dunai early warning radar, VHF band.
- Try Add target tracking radar, range 750 km.
The GORGON uses nuclear warheads; the GAZELLE may use nuclear or conventional. The GORGON is, in principle, also a anti-satellite missile.