When a weapon has successfully hit its target the players must determine if the weapon has penetrated the defenses of the target. The attack class of the weapon is compared to the armor class of the target by cross-indexing the two values on the Penetration table.
I added an optional rule which allows the player whose piece has been hit to roll for penetration instead of the attacking player. This equates to the “savings roll” featured in many other games.
For the full text, please open the file below. The associated tables are attached.