Square Pair**

Square Pair** is a ground-based missile fire control radar associated with the SA-5 Gammon** surface-to-air missile (SAM) system. It is used with Back Net** or Side Net ** height-finding radars.

Square Pair can manage up to six SA-5 Gammon launchers at once, but is reportedly vulnerable to electronic countermeasures (ECM).

Initial operational capability (IOC) 1964. In service (see "Users," below).

 SA-5 Gammon
  Azerbaijan
  Belarus
  Bulgaria
  Georgia
  Iran
  Kazakhstan
 ...