Barrage is a passive cannon skill which increases the overall amount of damage done by the pirate's cannon and grenade attacks.
Increasing this ability increases the damage bonus:
- Rank 1 - 5%
- Rank 2 - 10%
- Rank 3 - 15%
- Rank 4 - 20%
- Rank 5 - 25%
- Rank 6 - 27.5%
- Rank 7 - 30%
- Rank 8 - 32.5%
Unlocked at Cannon Skill - Level 10