Certain weapons target an area instead of a single creature, affecting anything in either a cone- or line-shaped burst. Using such a weapon in combat requires a standard action. Continual fire is when the effect of such a weapon is sustained for one or more rounds. If a weapon is capable of using continual fire, it is listed in that weapon's equipment statistics block. If the weapon normally allows a saving throw, so do all attacks within a continual fire. Ammunition: When weapons work with fuel or ammunition, one round of continual fire requires double the amount of a normal attack.