By executing a rapid barrel roll the captain reduces the damage caused to the hull by bringing fresh shields to bear and spreading the effect of focused beam weapons.
By executing a barrel roll the captain brings all side mounted guns to bear on the target at least for a portion of the turn, increasing the potential damage to the target.
 Level: 7
 ROLL: Wits+Crew Ability [or Captain's Warfare(Fleet Tactics)]
 Init: -2
 Goal: -
 Damage: Varies
 Effect: All side mounted guns can fire on any target on either side arc of  the ship with a -2 Goal modifier.