Mobile friendly and in 1:1 scale
DCS players will be quite familiar with this one, Av8b and A10 killer (under 10000ft). When over 10000ft, any aircraft can destroy it easily even by using GBUs. So it always deployed together with SA-8/SA-6(SA-8 used by motorised Infantry and SA-6 used by armored forces) and zsu23-4 (for shorter range ).

HOW TO OPERATE:
Pitch to move forward
Roll to steer
VTOL for launcher horizontal movement and Trim for vertical movement
AG1- Set up launcher
AG2- Missile Ready
AG3- For amphibious operations
In Addition: Use normal Throttle to move in water
AG8- Lights

What is Strela-1(from wiki):
The 9K31 Strela-1 (English: arrow) is a highly mobile, short-range, low altitude infra-red guided surface-to-air missile system. Originally developed by the Soviet Union under the GRAU designation 9K31, it is commonly known by its NATO reporting name, SA-9 "Gaskin". The system consists of a BRDM-2 amphibious vehicle, mounting two pairs of ready-to-fire 9M31 missiles.