no u can leave it alone to it will auto detect, but it is much more EFFECTIVE if u man it manually to lazer specific target u want, this is especially for against jets which fly back & fort across the map.

just as the video showed, a good javelin squad could place all vehicle @ spawn point. The only way to deal with this is to stop using vehicle change to Medic/support storm the objective/kill them. <-- tell people stop using vehicle? thats like telling them to stop eating LOL!!