This article is about the perks available in Assassin's Creed: Pirates. You may be looking for the perks available in Assassin's Creed: Syndicate. 
Perks are upgrades and abilities that can be used to improve Alonzo Batilla's ships in various ways, and can be unlocked by recruiting new crew members. Perks can be either passive or active and are classified as Bronze, Silver, Gold and Legendary perks, depending on their frequency and efficiency.
Sail (Passive)
Bronze Perks
Fog Expert: Increases the field of view in the fog.
 Level I: Field of view increased by 30%
 Level II: Field of view increased by 65%
 Level III: Field of view increased by 100%
Fog Range: Increases the fog of war's reveal.
 Level I: Range increased by 15%
 Level II: Range increased by 30%
 Level III: Range increased by 45%
Liberator: Increases time given to attack slavers.
 Level I: Time increased by 5 s
 Level II: Time increased by 10 s
 Level III: Time increased by 15 s
Night Vision: Decreases enemies' speed at night.
 Level I: Enemies' speed decreased by 5%
 Level II: Enemies' speed decreased by 10%
 Level III: Enemies' speed decreased by 15%
Stay Alive: Increases time given to save sailors lost at sea.
 Level I: Time increased by 5 s
 Level II: Time increased by 10 s
 Level III: Time increased by 15 s
Wind Down: Reduces the effect of the wind down zones in assassination missions.
 Level I: Effect reduced by 15%
 Level II: Effect reduced by 30%
 Level III: Effect reduced by 45%
Wind Up: Increases the effect of the wind up zones in assassination missions.
 Level I: Effect increased by 15%
 Level II: Effect increased by 30%
 Level III: Effect increased by 45%
Silver Perks
Discretion: Increases the enemy ships' reaction time.
 Level I: Enemy reaction time slowed down by 20%
 Level II: Enemy reaction time slowed down by 40%
 Level III: Enemy reaction time slowed down by 60%
Dynamic Event: Increases the probability of dynamic events occurring.
 Level I: Chance increased by 10%
 Level II: Chance increased by 20%
 Level III: Chance increased by 30%
Expert Seaman: Increases the ship's maneuverability.
 Level I: Manipulation improved by 5%
 Level II: Manipulation improved by 10%
 Level III: Manipulation improved by 15%
High Spirits: Increases the ship's power when the weather is sunny.
 Level I: Power increased by 3%
 Level II: Power increased by 7%
 Level III: Power increased by 10%
Iron Sails: Reduces the gust zone effects.
 Level I: 10% reduction
 Level II: 20% reduction
 Level III: 30% reduction
Ship Collision: Reduces collision damage during race missions.
 Level I: Damage decreased by 10%
 Level II: Damage decreased by 20%
 Level III: Damage decreased by 30%
Gold Perks
Boost: Decreases boost reload time.
 Level I: Decreased by 5%
 Level II: Decreased by 10%
 Level III: Decreased by 15%
File Seeker: Increases detection range for lost files.
 Level I: Range increased by 10%
 Level II: Range increased by 20%
 Level III: Range increased by 30%
Full Speed: Increases the ship's speed.
 Level I: Speed increased by 5%
 Level II: Speed increased by 7%
 Level III: Speed increased by 10%
Minesweeper: Reduces the frequency of the mines dropped by escort ships.
 Level I: Mines decreased by 30%
 Level II: Mines decreased by 50%
 Level III: Mines decreased by 70%
Rage: Increases damage dealt to enemies when the ship's HP falls below 25%.
 Level I: Damage increased by 20%
 Level II: Damage increased by 35%
 Level III: Damage increased by 50%
Legendary Perks
Experience x2: Doubles XP.
 Unlocked by recruiting Kanhoji Angre into your crew for 200,000 coins
Figurehead (Active)
Bronze Perks
Loot Zone: Loots every crate around the ship.
 Level I: Cooldown of 60 s
 Level II: Cooldown of 50 s
 Level III: Cooldown of 40 s
Repair: Partially restores ship's HP.
 Level I: Restores 10% of ship's total HP, cooldown of 100 s
 Level II: Restores 15% of ship's total HP, cooldown of 100 s
 Level III: Restores 20% of ship's total HP, cooldown of 100 s
Silver Perks
Bullet Time: Reduces enemies' speed and increases their attack cooldowns.
 Level I: 30% speed reduction, cooldown of 60 s
 Level II: 40% speed reduction, cooldown of 60 s
 Level III: 50% speed reduction, cooldown of 60 s
Eagle Eye: Reveals a weak point on one enemy ship.
 Level I: Cooldown of 60 s
 Level II: Cooldown of 50 s
 Level III: Cooldown of 40 s
Instant Reload: Instantly reloads all weapons.
 Level I: Cooldown of 120 s
 Level II: Cooldown of 100 s
 Level III: Cooldown of 80 s
Speed Up: Temporarily boosts the ship's speed.
 Level I: Cooldown of 140 s
 Level II: Cooldown of 130 s
 Level III: Cooldown of 120 s
Spider Web: Increases the amount of spider shot by one.
 Level I: Cooldown of 100 s
 Level II: Cooldown of 85 s
 Level III: Cooldown of 70 s
Gold Perks
Intimidate: Resets all enemy attack cooldowns.
 Level I: Cooldown of 100 s
 Level II: Cooldown of 90 s
 Level III: Cooldown of 80 s
Tactical Stun: Stuns all enemy ships visible on tactical screen, preventing their attacks.
 Level I: 1 s stun time, cooldown of 60 s
 Level II: 1.5 s stun time, cooldown of 60 s
 Level III: 2 s stun time, cooldown of 60 s
Legendary Perks
Regeneration: Instantly restores all of a ship's HP. Cooldown of 140 s.
 Unlocked by recruiting John Howell into your crew for 500,000 coins
Hull (Passive)
Bronze Perks
Broadside: Increases the amount of projectiles in each round shot attack.
 Level I: Amount increased by 10%
 Level II: Amount increased by 20%
 Level III: Amount increased by 30%
Canister Pro: Increases the amount of shots in each attack.
 Level I: Shots increased by 40%
 Level II: Shots increased by 50%
 Level III: Shots increased by 60%
Fast Reload: Decreases reload time for all weapons.
 Level I: Reload decreased by 5%
 Level II: Reload decreased by 7%
 Level III: Reload decreased by 10%
Golden Touch: Increases the amount of gold looted.
 Level I: Increased by 10%
 Level II: Increased by 25%
 Level III: Increased by 50%
Harpoon King: Increases the harpoon's range.
 Level I: Increased by 10%
 Level II: Increased by 20%
 Level III: Increased by 30%
Lucky Loot: Increases the amount of resources in each crate.
 Level I: Increased by 10%
 Level II: Increased by 25%
 Level III: Increased by 50%
Old Salt: Increases XP again.
 Level I: Increased by 5%
 Level II: Increased by 10%
 Level III: Increased by 15%
Silver Perks
Dodge Mania: Reduces enemies' firing zone.
 Level I: Enemy firing zone reduced by 10%
 Level II: Enemy firing zone reduced by 15%
 Level III: Enemy firing zone reduced by 20%
Heavy Shot Pro: Increases the heavy shot's precision.
 Level I: Line speed reduced by 15%
 Level II: Line speed reduced by 30%
 Level III: Line speed reduced by 45%
Mine Defender: Reduces mine damage.
 Level I: Damage reduced by 10%
 Level II: Damage reduced by 20%
 Level III: Damage reduced by 30%
Mortar Pro: Widens the mortar's impact zone.
 Level I: Impact range increased by 10%
 Level II: Impact range increased by 20%
 Level III: Impact range increased by 30%
Slow Cannons: Increases enemies' reload time.
 Level I: Reload time increased by 5%
 Level II: Reload time increased by 7%
 Level III: Reload time increased by 10%
Swivel Pro: Increases the swivel gun's stability.
 Level I: Stability increased by 25%
 Level II: Stability increased by 50%
 Level III: Stability increased by 75%
Gold Perks
Brute Force: Increases damage for all weapons.
 Level I: Damage increased by 5%
 Level II: Damage increased by 10%
 Level III: Damage increased by 15%
Bullet Expert: Slows down incoming cannonballs in canon defense.
 Level I: Increases defense time by 10%
 Level II: Increases defense time by 20%
 Level III: Increases defense time by 30%
Critical Shot: Increases the chance for a critical hit.
 Level I: Probability increased by 5%
 Level II: Probability increased by 7%
 Level III: Probability increased by 10%
Damage Control: Reduces incoming damage from all enemies.
 Level I: 5% damage reduction
 Level II: 10% damage reduction
 Level III: 15% damage reduction
Fireproof: Decreases damage of accidently sliced explosive cannonballs.
 Level I: Damage decreased by 10%
 Level II: Damage decreased by 20%
 Level III: Damage decreased by 30%
Lucky Reload: Gives a chance of instantly reloading weapons after use.
 Level I: Probability of reloading 5%
 Level II: Probability of reloading 7%
 Level III: Probability of reloading 10%
Merchant Shield: Reduces the damage accidentally inflicted to merchant ships.
 Level I: Damage decreased by 10%
 Level II: Damage decreased by 15%
 Level III: Damage decreased by 20%
Retaliation: Deals a portion of the sustained damage to the enemy.
 Level I: Deals 40% of received damage back to the enemy
 Level II: Deals 50% of received damage back to the enemy
 Level III: Deals 60% of received damage back to the enemy
Tank: Increases the ship's maximum HP.
 Level I: Increased by 5%
 Level II: Increased by 10%
 Level III: Increased by 15%
Treasure Bounty: Increases the probability of looting treasure maps.
 Level I: Chance increased by 10%
 Level II: Chance increased by 20%
 Level III: Chance increased by 30%
Legendary Perks
Damage x2: All weapons deal twice their usual damage.
 Unlocked by recruiting Paulsgrave Williams into your crew for 1500,000 coins
Gun Crazy: All available weapons are ready to fire at the beginning of each battle.
 Unlocked by recruiting Calico Jack into your crew for 100,000 coins
Supplier: Increases the amount of collected resources obtained in each loot.
 Unlocked by recruiting Yakone into your crew by completing The White Whale
Cannons (Active)
Bronze Perks
Chain Shot: Next attack reduces enemy ship's mobility.
 Level I: 40% mobility reduction, cooldown of 30 s
 Level II: 60% mobility reduction, cooldown of 30 s
 Level III: 80% mobility reduction, cooldown of 30 s
Hot Shot: Reduces enemy's HP over time.
 Level I: Reduces enemy's HP by 10%, cooldown of 60 s
 Level II: Reduces enemy's HP by 20%, cooldown of 60 s
 Level III: Reduces enemy's HP by 30%, cooldown of 60 s
Ultimate Strike: Increases the power of the next attack.
 Level I: Power increased by 20%, cooldown of 80 s
 Level II: Power increased by 40%, cooldown of 70 s
 Level III: Power increased by 60%, cooldown of 60 s
Gold Perks
Big Shot: Next attack stuns enemy ship and prevents its attack.
 Level I: 3 s stun time, cooldown of 80 s
 Level II: 4 s stun time, cooldown of 70 s
 Level III: 5 s stun time, cooldown of 60 s
Critical Strike: Next attack will be a critical hit.
 Level I: Cooldown of 80 s
 Level II: Cooldown of 70 s
 Level III: Cooldown of 60 s
Reference
