We use Barrage templates to determine the area of effect for certain weapons.
When the rules tell you when to place a Barrage template as part of a game effect, use these conventions.
When the rules tell you to place a Barrage template you must place it such that it is completely within range and line of fire of the shooting unit.
|Units that have the Artillery ability benefit from the Indirect Fire rule — so they do not need a line of fire.
A unit is 'covered by' or 'under' the template when any one of these conditions is true:
Infantry unit: The centre of the unit’s base is under the template or touched by the edge of the template. 
Vehicle or War Engine unit: Any part of the unit’s base is under the template or touched by the edge of the template.