Assuming that this is like a Stinger, I’m pretty sure that it did have a lock on something. That’s that high-pitched sound you hear shortly before the operator fires — it plays when its infrared sensor sees something bright, something hot:
Now, it does look like it wound up heading after something other than what the operator intended, but I believe that he had something hot in its sights at the time that he squeezed the trigger.
Assuming that this is like a Stinger, I’m pretty sure that it did have a lock on something. That’s that high-pitched sound you hear shortly before the operator fires — it plays when its infrared sensor sees something bright, something hot:
Stinger lock-on tone recording:
https://www.youtube.com/watch?v=9KSJVM9Ymck
Now, it does look like it wound up heading after something other than what the operator intended, but I believe that he had something hot in its sights at the time that he squeezed the trigger.