The 9K32 "Strela-2" (arrow), NATO reporting name SA-7 "Grail" is a man-portable, shoulder-fired, low-altitude surface-to-air missile (SAM) system, with a high explosive warhead and passive infrared homing guidance.
was the first generation of Soviet man portable SAMs, its first
version entered service in 1968.
Further, a supplementary early warning system
consisting of a passive RF antenna and headphones can be used to
provide early cue about the approach and rough direction of an enemy
aircraft. Although the SA-7 is limited in range, speed, and
altitude, it forces enemy pilots to fly above minimum radar
limitations which results in detection and vulnerability to
regimental and divisional air defence systems.
The SA-7a had a slant range of 3.6 km and a kill
zone between 15 and 1500 metres in altitude, with a speed of about
430 metres per second (Mach 1.4). The SA-7b has a slant range of
about 4.2 km, a ceiling of about 2300 metres, and a speed of about
500 metres per second (Mach 1.75). Both the SA-7a and SA-7b are
tail-chase missile systems, and its effectiveness depends on its
ability to lock onto the heat source of low-flying fixed- and
rotary-wing aircraft targets.