[Imp]

What he is saying basicaly is the same as you do with ground units. If one unit is fired on switch units so the firer changes targets. Also & important due to the speed of them alternate moving units keeping them together say in 10 hex moves. That way if someone is fired on you have several eyes to hopefully see it. If move one unit 40 hexes before the next they are probably to far away to see the firer. Remember also just like ground units the faster you go the less you see.

So move & SAM fires if it survives use another unit to draw fire & pull him back.
Now move everyone up to the judged safe point before trying again so next go stationary reasonably near lots of eyes should see him.

As said a lot easier as combined arms helos hunt ATGMs etc ground forces hunt SAMs both try to spot the other unit type. Try Vietnam type terrain dense jungle hard to get a shot on helos. Of course catch 22 is easy to run up beside infantry so being up high protects from them but now makes you a AAA target.