Upgrades

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How it Works: Upgrades. 30 Jun 2020

A player earns access to Upgrades at Access Level 9, allowing him to customize and improve each ship's performance to suit his play style. Ships of different tiers have access to different upgrades, described by the tables below. Certain upgrades are unique to certain ship types or nations, or even to a specific ship; check the Notes table columns for more detail.

Managing upgrades

One upgrade can be mounted in each slot. A particular upgrade can be mounted only in its appropriate slot.

An upgrade — mounted or demounted (in Inventory) — can be sold for half of its nominal purchase cost (some upgrades are not purchasable but obtained by other means). If the desired upgrade is available in Inventory, it may be mounted only from Inventory; an upgrade can be purchased only if one is not available in Inventory.

A mounted upgrade can be demounted to Inventory for 25 , or sold. When selling a ship, all upgrades mounted on that ship must either be sold or demounted.

Base Upgrades

Base upgrades are purchased for credits. Some packages for purchase, challenge rewards, and mission rewards may also grant base upgrades.

Slot 1 (Tier I+)

Icon	Equipment Name	Cost	Description	Notes
	Main Armaments Modification 1	125000	-20% to the risk of main battery becoming incapacitated. +50% to main battery survivability. -20% to main battery repair time. -20% to the risk of torpedo tubes becoming incapacitated. +50% to torpedo tubes survivability. -20% to torpedo tubes repair time.
	Auxiliary Armaments Modification 1	125000	+100% to secondary battery survivability. +100% to AA mounts survivability.	Not available to submarines.
	Aiming Systems Modification 0	125000	+20% to main battery traverse speed. -40% to maximum dispersion of main battery shells. +20% to torpedo tubes traverse speed. +20% to secondary battery maximum firing range. -40% to maximum dispersion of secondary battery shells.	Available only to Iwaki Alpha, Yubari, and Katori.
	Air Groups Modification 1	125000	+20 to the speed of air groups returning to the aircraft carrier.	Available only to aircraft carriers.
	Sonar Modification 1	125000	Improves sonar survivability: -25% to the risk of the sonar becoming incapacitated. -25% sonar repair time.	Available only to submarines.

Slot 2 (Tier III+)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control System Modification 1	250000	-3% to the risk of flooding when torpedoes hit the torpedo protection. -5% to the risk of fire.	Torpedo flooding modifier only applies to ships with a torpedo protection system (viewable under the Survivability tab of the Port screen). Not available to submarines.
	Engine Room Protection	250000	For engine and steering gears: -20% to the risk of becoming incapacitated. -20% to repair time.	Not available to aircraft carriers.
	Aircraft Engines Modification 1	250000	+10% engine boost time.	Available only to aircraft carriers. Stacks with the Improved Engine Boost skill.
	Sonar Modification 2	250000	Quicker target acquisition: +10% sonar ping velocity.	Available only to submarines. Stacks with the Enhance Impulse Generator commander skill.
	Damage Control System Modification 3	250000	-5% Fire damage. -5% Flooding damage.	Available only to submarines.

Slot 3 (Tier V+)

Icon	Equipment Name	Cost	Description	Notes
	Main Battery Modification 2	500000	+15% to main battery traverse speed.	Stacks with Grease the Gears skills.
	Aiming Systems Modification 1	500000	-7% to maximum dispersion of main battery shells. +20% to torpedo tubes traverse speed. +5% to secondary battery maximum firing range. -5% to maximum dispersion of secondary shells.	American battleships have access to Artillery Plotting Room Modification 1 instead.
	Artillery Plotting Room Modification 1	500000	Extends the firing range of the main battery and secondary battery +16% to main battery maximum firing range. +5% to secondary battery maximum firing range. -5% to maximum dispersion of secondary battery shells.	Available only to American battleships. Stacks with Long-Range Secondary Battery Shells, Improved Secondary Battery Aiming.
	Attack Aircraft Modification 1	500000	+2 seconds attack time.	Available only to aircraft carriers.
	Torpedo Bombers Modification 1	500000	+5 seconds attack time.	Available only to aircraft carriers.
	Skip Bomber Modification 1	500000	+2 seconds attack time.	Available only to aircraft carriers.
	Torpedo Tubes Modification 1	500000	+20% to the traverse speed of torpedo tubes −40% to the chances of critical damage to torpedo tubes +5% to the speed of shipborne torpedoes.	Cannot be mounted on an aircraft carrier.
	Aerial Torpedoes Modification 1	500000	+5% speed of torpedoes dropped from the air.	Available only to aircraft carriers.
	Secondary Battery Modification 1	500000	+20% secondary battery range. -20% secondary battery dispersion.	See the Secondary Armament article. Not available to submarines.
	AA Guns Modification 1	500000	-20% reduction in the preparation time of the priority AA sector.	See the Anti-Aircraft Fire article for the secrets of AA defenses. Cannot be mounted on an aircraft carrier.
	Dive Capacity Modification 1	500000	+10% dive capacity recharge rate on the surface.	Available only to submarines. Stacks with Dive Capacity Modification 2 and the Improved Battery commander skills.

Slot 4 (Tier VI+)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control System Modification 2	1000000	-15% to flooding recovery time. -15% to time of fire extinguishing.	Stacks with battleship skill Basics of Survivability.
	Propulsion Modification 1	1000000	Reduces time to full speed -50% to time for reaching full power. Increases engine power when the ship starts moving.	Not available to British tech tree battlecruisers, light cruisers, or destroyers (except Gallant), Renown '44, Hampshire, Gibraltar, Monmouth, Hector,  West Virginia 1944, Kansas, Minnesota, Vermont and Kitakami which have high acceleration by default. Not available to Aircraft Carriers. Details in footnote.
	Steering Gears Modification 1	1000000	-20% to rudder shift time.	Not available to aircraft carriers or submarines.
	Air Groups Modification 3	1000000	+5% Squadron speed. +15% Aircraft HP. -5% Aircraft preparation time.	Available only to Ise, Tone, Kearsarge, Nebraska, Delaware, Louisiana, Halford, and Kommissar. Stacks with Focus Fire Training.
	Attack Aircraft Modification 2	1000000	+7.5% aircraft HP.	Available only to aircraft carriers. Stacks with Survivability Expert and Air Groups Modification 2 .
	Torpedo Bombers Modification 2	1000000	+7.5% aircraft HP.	Available only to aircraft carriers. Stacks with Survivability Expert and Air Groups Modification 2 .
	Bombers Modification 1	1000000	+7.5% aircraft HP.	Available only to aircraft carriers. Stacks with Survivability Expert and Air Groups Modification 2 .
	Skip Bomber Modification 2	1000000	+7.5% aircraft HP.	Available only to aircraft carriers. Stacks with Survivability Expert and Air Groups Modification 2 .
	Depth Charges Modification 1	1000000	More deep explody things. +2 number of depth charges.	Available to ships with depth charges.
	Airstrike Modification 1	1000000	Stronger air strikes. -20% Air Strike reload time. +25% aircraft HP. +15% depth charge damage.	Available to ships with anti-surface air strike capability and to those with no organic ASW weapon system.
	Submarine Steering Gears	1000000	For a more agile submarine. -50% rudder shift time. -50% diving plane shift time.	Available only to submarines. Stacks with the Enhanced Rudder Gears consumable, and the Helmsman commander skill.

Slot 5 (Tier VIII+)

Icon	Equipment Name	Cost	Description	Notes
	Torpedo Lookout System	2000000	Assured acquisition range of torpedoes: 1.8 km.	Stacks with the battleship skill Vigilance. Does not extend the torpedo acquisition range for the Hydroacoustic Search  consumable. Not available to aircraft carriers and submarines.
	Ship Consumables Modification 1	2000000	+10% to the action time of ship consumables.	Cannot be mounted on aircraft carriers. Stacks multiplicatively with the Consumables Enhancements skills, Emergency Repair Expert, Eye in the Sky.
	Squadron Consumables Modification 1	2000000	+1 number of squadron consumable charges.	Can be mounted on aircraft carriers only.
	Concealment System Modification 1	2000000	-10% to detectability radius. +5% to the maximum dispersion of enemy shells fired at your ship.	Stacks multiplicatively with various concealment skills. Not available to submarines.
	Steering Gears Modification 2	2000000	-40% to rudder shift time. -80% to steering gears repair time.	Unavailable to battleships, aircraft carriers or submarines. Stacks with Steering Gears Modification 1 .
	Flight Control Modification 1	2000000	Does not increase the maximum number of each type of tactical squadron aircraft on deck. -5% aircraft restoration time. +2 deck places.	Can be mounted on aircraft carriers only. Stacks with the Air Supremacy skill.
	Torpedo Tubes Modification 3	2000000	* +7% Torpedo damage.	Available only to submarines.
	Reinforced Bulkheads	2000000	* -15% Damage taken from depth charges.	Available only to submarines.

Slot 6 (Tier IX+)

Icon	Equipment Name	Cost	Description	Notes
	Main Battery Modification 3	3000000	-12% to main battery loading time. -13% to the main battery traverse speed.	Guns reload faster in exchange for slower turret traverse. Stacks multiplicatively with the Grease the Gears skills, Close Quarters Combat, Top Grade Gunner, Main Battery and AA Specialist, Swift in Silence, and Fearless Brawler.
	Torpedo Tubes Modification 2	3000000	-15% to torpedo tube reload time. +50% to the risk of torpedo tubes becoming incapacitated.	Torpedo tubes reload faster in exchange for greater risk of incapacitation. Stacks with the Fill the Tubes skills. Mitigated by the Preventive Maintenance skills.
	Gun Fire Control System Modification 2	3000000	+16% to main battery maximum firing range.	Not available to Russian destroyers, Russian battleships (except AL Sov. Rossiya and Navarin), or American battleships. Stacks with Main Battery and AA Expert.
	Artillery Plotting Room Modification 2	3000000	-11% to maximum dispersion of main battery.	Available only to American battleships.
	Flight Control Modification 2	3000000	+5% cruising speed.	Available only to aircraft carriers. Stacks with Improved Engines, Bomber Flight Control.
	Air Groups Modification 2	3000000	+7.5% to aircraft HP.	Available only to aircraft carriers. Stacks with the Slot 4 aircraft upgrades, and Survivability Expert.
	Auxiliary Armaments Modification 2	3000000	−20% to the secondary battery reload time +15% to the continuous damage of AA guns +15% to the damage within the explosion radius of shells fired by AA defenses +2 explosions in AA salvos when the Defensive AA Fire consumable is active	Stacks with a number of commander skills. Not available to submarines.
	Dive Capacity Modification 2	3000000	Allows longer dives. +15% dive capacity.	Available only to submarines. Stacks with Dive Capacity Modification 1 and the Improved Battery commander skills.

Special Upgrades

A special upgrade is an upgrade that modifies the behavior of an associated consumable. These upgrades are obtained through the Armory, currently for Coal. Special upgrades mount and demount like other upgrades — only one upgrade in a slot at one time.

The ship must be able to equip the corresponding consumable in order to mount the upgrade.

A special upgrade does nothing if its corresponding consumable is not mounted. For instance, Defensive AA Fire Modification 1 functions only if a Defensive AA Fire  consumable is also mounted.

Slot 1

Icon	Equipment Name	Cost	Sell Price	Description	Notes
	Damage Control Party Modification 1	17,000	625,000	Increases the action time of the Damage Control Party and Fast Damage Control Team consumables. +40% action time.	Any ship.
	Spotting Aircraft Modification 1	17,000	625,000	Increases the action time of the Spotting Aircraft, Rapid Takeoff Spotter, and High-Precision Spotter consumables. +30% action time.	Ships with an appropriate spotter aircraft consumable only. Note the interaction with the Eye in the Sky cruiser skill.

Slot 2

Icon	Equipment Name	Cost	Sell Price	Description	Notes
	Engine Boost Modification 1	17,000	625,000	Increases the action time of the Engine Boost and Emergency Engine Power consumables. +30% action time.	Tier III-X ships with an Engine Boost consumable only.
	Defensive AA Fire Modification 1	17,000	625,000	+20% action time. -10% cooldown time.	Ships with a Defensive AA Fire  consumable only. Stacks with Ship Consumables Modification 1 and the Consumables Specialist skills.
	Hydroacoustic Search Modification 1	17,000	625,000	Increases the action time of the Hydroacoustic Search and Short-Range Hydroacoustic Search consumables. +20% action time.	Ships with an appropriate Hydroacoustic Search  consumable only. Stacks with Ship Consumables Modification 1 and the Consumables Enhancements skills.
	Surveillance Radar Modification 1	17,000	625,000	+20% action time.	Ships with the Surveillance Radar  consumable only. Stacks with Ship Consumables Modification 1 and the Consumables Enhancements skills.
	Reserve Battery Unit Modification 1	17,000	1250000	+20% Reserve Battery Unit consumable action time.	Available only to submarines.

Slot 3

Icon	Equipment Name	Cost	Sell Price	Description	Notes
	Smoke Generator Modification 1	17,000	625,000	Increases the action time of the Smoke Generator, Short-Burst Smoke Generator, Crawling Smoke Generator, Exhaust Smoke Generator, and Smoke Curtain Generator consumables. +20% to the emission time.	Tier V-X ships with the appropriate type of Smoke Generator consumable only. Stacks with the Consumables Enhancements skills.
	Submarine Surveillance Modification 1	17,000	1250000	-20% Submarine Surveillance  preparation and cooldown time.	Available only to ships with the Submarine Surveillance  consumable.

Unique Upgrades ("Legendary" Upgrades)

Unique upgrades (often referred to as "Legendary upgrades") are upgrades for Tier X tech tree ships. The aim of these upgrades is to adjust the characteristics of a ship to make it perform better in a specific role or offer an alternative style of game play while keeping ships in balance with each other, even if one ship has the unique upgrade and another does not.

The upgrades mount and demount like other upgrades (only one upgrade in a slot at a time) in slots 5 or 6, depending on the ship. In the Upgrades section of the Equipment page in Port, a small red star will appear on the slot where a unique upgrade can be mounted when one is available in Inventory.

To obtain a unique upgrade, each can be purchased for 19,200 in the Research Bureau section of the Armory.

Slot 5

Occupying Slot 5, these upgrades block the mounting of e.g. Concealment System Modification 1 .

——  Upgrades  ——  (click here)

Icon	Equipment Name	Sell Price	Description	Notes
	Enhanced Engineering Systems	2,500,000	Expands the ship's tactical role by allowing for a more dynamic combat style. +13% to main turrets traverse speed. –40% to rudder shift time. –80% to steering gears repair time.	Conqueror only.
	Reinforced Emergency Response	2,500,000	Improves the ship's tactical role by increasing survivability and maneuverability. –10% to fire extinguishing time. –10% to flooding recovery time. –30% to rudder shift time. –70% to steering gears repair time.	Montana only.
	Upgraded Damage Control Equipment	2,500,000	Improves the ship's survivability and maneuverability. –50% to main battery repair time. –40% to fire extinguishing time. –70% to flooding recovery time. –20% to rudder shift time.	Hindenburg only.
	Improved Main Battery Loading Mechanisms	2,500,000	Improves the ship's tactical role by increasing the efficiency of long-range engagements. +10% detectability radius. +5% to main battery maximum firing range. –10% to main battery reload time.	Henri IV only.
	Aerosol Smoke Curtain System	2,500,000	Improves the ship's tactical role by reducing the minimum effective engagement range thanks to the ability to maneuver in smoke areas at low speeds. –5% to detectability range. -10% to ship consumables prep and cooldown times. +300% to Smoke Generator action time. –20% to smoke screen dispersion time.	Minotaur only.
	Augmented Smoke Generators	2,500,000	Strengthens the tactical role of a warship, allowing for more frequent maneuvers under the cover of smoke. Provides two additional Exhaust Smoke Generator consumable charges Reduces Exhaust Smoke Generator consumable cooldown time from 180 to 81 s	Venezia only.
	Master Fire Control Director	2,500,000	Improves the ship's tactical role by increasing the efficiency of artillery. –6% to main battery loading time. +10% to main battery maximum firing range. –20% to action time of the ship's consumables.	Khabarovsk only. The upgrade places emphasis on aggressive game play due to the enhanced main battery guns and reduced effectiveness of consumables.
	Torpedo Fire Control System	2,500,000	Improves the ship's tactical role by increasing the efficiency of torpedo attacks. –5% to detectability. –15% to torpedo tubes reload time. +5% faster torpedoes. -10% detectability range of torpedoes.	Z-52 only. The upgrade will make X Z-52 a more capable torpedo destroyer, but at the same time make her less effective in Key Areas due to the reduced bonus to concealment compared with the concealment upgrade.
	Improved Hull Concealment	2,500,000	Improves the ship's tactical role by increasing the efficiency of sudden and stealth attacks. –15% to detectability. +5% to maximum dispersion of shells fired by the enemy attacking your ship. +15% to main battery loading time. +5% to torpedo tubes reload time.	Gearing only.
	Improved Main Artillery	2,500,000	Improves the ship's tactical role by increasing the efficiency of artillery at mid-range. –18% to main battery reload time. +20% to smoke screen dispersion time. +20% to the action time of Surveillance Radar .	Yueyang only. The upgrade offers more aggressive game play with an accent on consumables and main battery instead of the concealment upgrade which involves a safe play style.
	Heavier Torpedo Warheads	2,500,000	Improves the ship's tactical role by increasing the efficiency of torpedo attacks. -5% detectability range (including underwater) −20% to the torpedo tube reload time. +15% maximum torpedo damage.	Daring only. X Daring is currently a versatile ship with a slight focus on artillery. With the upgrade, she can stay some distance away from a Key Area and focus on torpedoes and attacks from within a smoke screen.
	Additional Smoke Generators	2,500,000	Improves the ship's tactical role by reducing the minimum effective engagement range thanks to the ability to maneuver in smoke areas at low speeds. +30% smoke screen dispersion time. +100% Smoke Generator action time. +1 charge for all consumables.	Harugumo only. This unique upgrade offers some improvements for game play that involve the use of smoke screens, at the cost of detectability and reduced effectiveness in battles for Key Areas. Thus, the ship can escape at ¼ speed while setting a smoke screen and reach the optimal distance for firing.

Slot 6

By occupying Slot 6, these upgrades block some popular choices such as Main Battery Modification 3 .

——  Upgrades  ——  (click here)

Icon	Equipment Name	Sell Price	Description	Notes
	Main Battery Fire Control Station	2,500,000	Changes the ship's tactical role by shifting the effective engagement range from long to medium distance. –18% to main battery loading time. –24% to main battery maximum firing range.	République only.
	Improved Ammunition Hoists	2,500,000	Improves the ship's tactical role by increasing the efficiency of short- and medium-range engagements. –10% to main battery loading time. –15% to secondary battery loading time. –8% to main battery maximum firing range.	Großer Kurfürst only.
	Main Battery Director System	2,500,000	Improves the ship's tactical role by increasing the efficiency of long-range engagements. –7% to maximum dispersion of main battery shells. –13% to main turrets traverse speed.	Yamato only. There is an identical version for ARP Yamato. The upgrade offers a choice between greater damage per minute (with MBM3) and better accuracy (with this upgrade).
	Automated Main Battery Loading Mechanism	2,500,000	Changes the ship's tactical role by shifting the effective engagement range from long to medium distance. −18% to the main battery reloading time. −12% maximum main battery firing range.	Kremlin only. The upgrade allows for a more aggressive game play style, with the ship sacrificing her survivability in return for a bonus applied to her main battery firing rate.
	Improved Bridge	2,500,000	Improves the ship's tactical role by increasing the efficiency of open-area engagements. –7% to maximum dispersion of main battery shells. +8% to main battery maximum firing range.	Zao only. This makes Zao more effective when playing in open waters and engaging from long distances.
	Enhanced Propulsion Plant	2,500,000	Improves the ship's tactical role by increasing the efficiency of dynamic short- and medium-range engagements. –50% to time taken to reach full speed when accelerating. –20% to rudder shift time.	Des Moines only. Players choose between this unique upgrade and an upgrade that increases firepower.
	Enhanced Countermeasures	2,500,000	Improves the ship's tactical role by increasing the efficiency of AA guns and consumables. +1 number of consumables. -20% AA sector reinforcement preparation time. -20% reload time of ship's consumables.	Worcester only. The upgrade emphasizes the role of this ship as a versatile cruiser.
	Ballistic Capped Armor-Piercing Shells	2,500,000	Enhances the tactical role of the ship, allowing you to focus on dealing with heavily armored targets. +10% AP shell damage. –10% maximum dispersion of main battery guns. –1 number of consumable charges.	Petropavlovsk only.
	Extended Main Battery Effective Range	2,500,000	Improves the ship's tactical role by increasing the efficiency of long-range engagements. –7% to maximum dispersion of main battery shells. +8% to main battery maximum firing range. –20% to main turrets traverse speed.	Moskva only. The changes offer a choice between the unique upgrade with its bonus to accuracy, and the standard bonuses to the guns' reloading time or firing range.
	Torpedo Quick Reload System	2,500,000	Improves the ship's tactical role by increasing the efficiency of long-range torpedo attacks. –25% to torpedo tube reload time. –70% to torpedo tube traverse speed. +50% to risk of torpedo tubes becoming incapacitated.	Shimakaze and AL Shimakaze only.
	Main Gun Automatic Loader	2,500,000	Improves the ship's tactical role by increasing the efficiency of artillery. –18% to main battery loading time. –7% to main turrets traverse speed. +20% to torpedo tube reload time.	Grozovoi only. The upgrade offers improvements for main battery gun-focused game play.
	Improved Camouflage Patterns	2,500,000	Changes the ship's tactical role by allowing for sudden and stealth torpedo attacks. −20% to the ship's detectability range. +60% to the main battery reload time.	Kleber and Kléber CLR only. The unique upgrade provides an alternative to artillery focused game play. When mounted, X Kléber becomes a torpedo-carrying destroyer for close quarters combat with her high speed, fast reload time, and detectability that's equal to that of other same-tier destroyers. The upgrade allows for more effective torpedo attacks at the cost of losing a significant amount of potential artillery damage per minute.
	Advanced Mechanical Maintenance	2,500,000	Expands the tactical role of a warship, allowing her to maintain survivability more effectively. Increases HP recovery efficiency when using the Repair Party consumable from 50 to 75% Increases the ship's maximum speed by 8% while the Engine Boost consumable is active All consumables gain one additional charge	Halland only.
	Modified External Hardpoints	2,500,000	Expands the ship's tactical role by increasing the efficiency of bombers. +5% bomber cruising speed. +10% bomb damage	Midway only. This upgrade offers game play with a focus on bombers with increased damage and speed.
	Fuel Injection System	2,500,000	Expands the ship's tactical role by allowing her to quickly attack enemy ships. +12.5% to maximum squadron speed. −30% engine boost action time.	Hakuryu only. The upgrade has the biggest effect when starting an attack approach. It significantly increases the speed of the aircraft and reduces the time spent within the enemy's AA defense range. The overall distance traveled with engine boost remains the same.
	Forced Takeoff and Landing Equipment	2,500,000	Expands the ship's tactical role by reducing the minimum effective engagement range. −15% to the ship's detectability range by sea. +20% Engine Boost action time. −50% to the time it takes to reach full power when accelerating. −30% rudder-shift time.	Audacious only. The upgrade allows the ship to get close to an opponent and thus increase the frequency of her aircraft attacks. At the same time, the risk of being detected by the opponent, as well as the risk of falling under heavy fire, increases.
	Aerodynamic Torpedo Fin Stabilizers	2,500,000	Enhances the tactical role of the ship, increasing torpedo bomber efficiency. +15% torpedo bomber HP. +10% maximum torpedo damage. –10% torpedo arming distance.	Manfred von Richthofen only.
	Automated Gun and Fuel Systems	2,500,000	Alters the ship's tactical role, boosting maneuverability and enabling swift target switching. +12% maximum ship speed while the Engine Boost consumable is active. -6% main battery reload time. +100% main battery traverse speed.	Elbing only.
	Ship-to-Shore Radio	2,500,000	Improves the ship's tactical role by increasing the efferiencey of Airstrike attacks. +1 number of Airstrike flights. -25% Airstrike armament reload time.	Gouden Leeuw only.