To fire a stone thrower, take the small round (3") template and place it anywhere with the central hole within the war machine's line of sight, outside of the stone thrower's minimum range and within its maximum range.

The template cannot be placed over friendly models, or enemy models from a unit that is engaged in combat, as the crew refuse to deliberately target their allies (although the shot might well go wide and hit friends by mistake as we'll discover later).

If placed over an enemy unit, the hole in the middle of the template must be placed over a single model.