The Dance of the Red
There are 3 types of drones.
The sensor drone, which increases your sensors score by one.
The repair drone, which heals a friendly vehicle at a rate of one stress per turn. (Cannot remove consiquences from your vehicle)
Or a missile drone, which shoots missiles at enemies.
Only command vehicles have the equipment required to control drones, and can only have as many as half their systems score, rounded down.