SUW-N-1

RPK-1 Vikhr (NATO code SUW-N-1 or FRAS-1)
SUW-N-1 missile launcher on the aircraft carrier Minsk
Type	Standoff anti-submarine ballistic missile
Place of origin	USSR
Service history
In service	1968
Used by	Soviet Navy
Specifications
Weight	1800 kg
Length	6.0 m
Diameter	0.54 m
Warhead	10 KT nuclear depth bomb
Engine	Solid propellant rocket motor
Operational range	10–24 km
Speed	Mach 1.8
Launch platform	Moskva class and Kiev class aircraft carriers

The SUW-N-1 was the NATO reporting name for the RPK-1 Vikhr (Russian: РПК-1 «Вихрь» - meaning Whirlwind) nuclear anti submarine missile system. FRAS-1 was the NATO code for the missile round itself.

The development of the missile was ordered in 1960 in order to combat the new American nuclear submarines. The requirement was for an all weather weapon capable of reaching out to 20 km at speed. The first test was in 1964 and the system was installed on the Moskva class helicopter cruisers in 1967. The system was also installed on the Kiev class aircraft carriers. The systems were decommissioned in the 1990s.

There were two models of launcher:

A prototype launcher was mounted on the Petya class frigate SKR-1 for testing in 1964

The missile was a two-stage rocket with inertial guidance, which could not be corrected after launch. The missile carried a nuclear depth bomb warhead of up to 10 kilotons in yield. The warhead could detonate at a depth of up to 200 m and had a lethal radius of 1.2 to 1.5 km against a submarine target.

The ships fitted with the RPK-1 had the Sprut fire control system (PUSTB-1123), which was developed by CDB-209 [2] and included: