Cover

When the guns start firing, most characters dive for cover. To keep things simple, being behind some sort of cover—a rock, crate, wall, or vehicle, for example— allows the character to gain a ranged defense of 1 and adds b to certain skill checks, such as Perception. A single b is sufficient for most situations, although the GM may add additional b if the target is particularly well covered, such as if they are within a trench, blockhouse, bunker, or any other prepared position. The same holds true for the increase in ranged defense.