The SA-7 GRAIL or Strela-2 is a man-portable, shoulder-fired, low-altitude surface-to-air missile (SAM) system similar to the US ArmyREDEYE[?], with a high explosive warhead and passive infrared homing guidance. The SA-7 was the first generation of Soviet man portable SAMs, introduced in the 1960s. 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 air defence systems[?]. The SA-7 is a tail-chase missile system[?] and its effectiveness depends on its ability to lock onto the heat source of low-flying fixed and rotary-wing aircraft.
... population density is 129.8/km² (336.2/mi²). There are 519 housing units at an average density of 43.6/km² (112.9/mi²). The racial makeup of the town ...