Upgrades

Players earn access to Upgrades starting at Account Level 6, allowing them to customize and improve each ship's performance to suit their desired play style. Ships of different tiers have access to different upgrades, defined by the tables below. Certain upgrades are unique to certain ship types or nations; check the Notes column for more detail.

Purchasing Upgrades

Upgrades may be purchased and mounted for credits. Some packages for purchase, challenge rewards, and mission rewards may also grant upgrades.

One upgrade can be mounted in each slot. A mounted upgrade may be sold for half of its purchase cost. Or, it may be demounted to Inventory for 25 . When selling a ship, all upgrades mounted on that ship must either be sold or demounted.

With 0.8.0, a number of upgrades pertaining to aircraft carriers and AA changed.
See this WoWS News article: https://worldofwarships.com/en/news/development/cv8-how-to-tune/#customization

Tier I+ Equipment (Slot 1)

Icon	Equipment Name	Cost	Description	Notes
	Main Armaments Modification 1	125000	Increases survivability and accelerates repairs of the main battery and torpedo tubes: -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.
	Air Groups Modification 1	125000	Increases the speed of aircraft returning to the carrier. +20 to the speed of air groups returning to the aircraft carrier.	Available only to aircraft carriers.
	Auxiliary Armaments Modification 1	125000	Increases survivability of the secondary battery and AA mounts: +100% to secondary battery survivability. +100% to AA mounts survivability.
	Magazine Modification 1	125000	Reduces the risk of magazine detonation: -70% to the risk of your ship's magazine detonation.
	Aiming Systems Modification 0	125000	Increases the firing accuracy of the main battery and secondary battery, accelerates the traverse speed of torpedo tubes and the main battery, and extends the firing range of the secondary battery: +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.

Tier III+ Equipment (Slot 2)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control System Modification 1	250000	Reduces the risk of fire and flooding: -3% to the risk of flooding and damage received when torpedoes hit the torpedo protection. -5% to the risk of fire.	Torpedo flooding and damage modifier only applies to ships with a torpedo protection system (viewable under the Survivability tab of the Port screen).
	Propulsion Modification 1	250000	Increases survivability and accelerates repairs of the engine: -20% to the risk of the engine becoming incapacitated. -20% to engine repair time.
	Steering Gears Modification 1	250000	Increases survivability and accelerates repairs of the steering gears: -20% to the steering gears repair time. -20% to the risk of the steering gears becoming incapacitated.
	Aircraft Engines Modification 1	250000	Increases the Engine Boost time of a carrier's squadrons. +10% engine boost time.	Available only to aircraft carriers. Stacks with the Improved Engine Boost skill.

Tier V+ Equipment (Slot 3)

Icon	Equipment Name	Cost	Description	Notes
	Main Battery Modification 2	500000	Increases the traverse speed of the main turrets: +5% to main battery loading time. +15% to main battery traverse speed.	Guns take longer to load in exchange for faster turret traverse. Stacks with Expert Marksman.
	Aiming Systems Modification 1	500000	Increases the firing accuracy of the main battery and secondary battery, accelerates the traverse speed of torpedo tubes, and extends the firing range of the secondary battery: -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	+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.
	Attack Aircraft Modification 1	500000	Extends the attack time of attack aircraft. +2 seconds attack time.	Available only to aircraft carriers.
	Torpedo Bombers Modification 1	500000	Extends the attack time of torpedo bombers. +5 seconds attack time.	Available only to aircraft carriers.
	AA Guns Modification 1	500000	Improves AA efficiency. +2 to number of explosions produced by salvos from medium- and long-range AA defenses.	See the Aerial Combat article for how AA defenses work.
	Secondary Battery Modification 1	500000	Extends firing range and increases firing accuracy of the secondary battery: +20% to secondary battery maximum firing range. -20% to maximum dispersion of secondary battery shells.	Stacks with Advanced Firing Training.

Tier VI+ Equipment (Slot 4)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control System Modification 2	1000000	Accelerates fire extinguishing and recovery from flooding: -15% to flooding recovery time. -15% to time of fire extinguishing.
	Propulsion Modification 2	1000000	Reduces time to full speed: -50% to time for reaching full power. Increases engine power when the ship starts moving.	Details in footnote. Unavailable to British cruisers, but they have high acceleration by default.
	Steering Gears Modification 2	1000000	Reduces rudder shift time: -20% to rudder shift time.
	Attack Aircraft Modification 2	1000000	Increases attack aircraft HP. +7.5% aircraft HP.	Stacks with Survivability Expert and Air Groups Modification 2 (). Available only to aircraft carriers.
	Torpedo Bombers Modification 2	1000000	Extends torpedo bombers HP. +7.5% aircraft HP.	Stacks with Survivability Expert and Air Groups Modification 2 (). Available only to aircraft carriers.
	Dive Bombers Modification 2	1000000	Increases dive bombers HP. +7.5% aircraft HP.	Stacks with Survivability Expert and Air Groups Modification 2 (). Available only to aircraft carriers.

Tier VIII+ Equipment (Slot 5)

Icon	Equipment Name	Cost	Description	Notes
	Target Acquisition System Modification 1	2000000	Increases maximum acquisition range: +50% to range of assured acquisition of enemy ships. +20% to spotting range. +20% to the acquisition range of torpedoes.	The spotting mechanics ignore line-of-sight obstacles — such as islands — when within 2 km (3 km with this upgrade) from an enemy. That's the "assured acquisition" range. Stacks with Vigilance when spotting torpedoes.
	Concealment System Modification 1	2000000	Decreases the detectability range of your ship and aircraft; increases the dispersion of shells fired by enemies attacking your ship: -10% to detectability radius. +5% to the maximum dispersion of enemy shells fired at your ship.	Stacks with Concealment Expert.
	Steering Gears Modification 3	2000000	Steering Gears Modification 3: -80% to steering gears repair time. -40% to rudder shift time.	Stacks with Steering Gears Modification 2 (). Unavailable to battleships or aircraft carriers.
	Flight Control Modification 1	2000000	Accelerates aircraft servicing and increases the maximum number of aircraft on deck. -5% aircraft restoration time +2 aircraft carrier deck places available.

Tier IX+ Equipment (Slot 6)

Icon	Equipment Name	Cost	Description	Notes
	Main Battery Modification 3	3000000	Decreases main battery reload time: -12% to main battery loading time. -13% to the main battery traverse speed.	Guns reload faster in exchange for slower turret traverse. Stacks with Basic Firing Training.
	Torpedo Tubes Modification 3	3000000	Decreases reload time of torpedo tubes: -15% to torpedo tube reload time. +50% to the risk of torpedo tubes becoming incapacitated.	Stacks with Torpedo Armament Expertise.
	Gun Fire Control System Modification 2	3000000	Extends the firing range of the main battery: +16% to main battery maximum firing range.	Stacks with Advanced Firing Training. Not available to Russian destroyers or American battleships.
	Artillery Plotting Room Modification 2	3000000	Increases the firing accuracy of the main battery: -11% to maximum dispersion of main battery.	Available only to American battleships.
	Flight Control Modification 2	3000000	Increases the cruising speed of a carrier's squadrons: +5% cruising speed.	Available only to aircraft carriers.
	Air Groups Modification 2	3000000	Increases the Hit Points of a carrier's aircraft. +7.5% to aircraft HP.	Stacks with Survivability Expert. Available only to aircraft carriers.
	AA Guns Modification 2	500000	Increases the efficiency of AA defenses. +15% continuous damage from all AA mounts; +15% damage per second within the explosion radius of shells fired from medium- and long-range AA defenses.	Stacks with Basic Firing Training and Advanced Firing Training skills. See Aerial Combat for how AA defenses work.
	Secondary Battery Modification 2	3000000	Decreases secondary battery reload time: -20% to secondary battery loading time.	Stacks with Basic Firing Training.

Special Upgrades

Special upgrades are upgrades that are obtainable only through the Arsenal, currently for Coal.

These upgrades are available for use in specific slots and generally restricted to ships Tier VI and above. Ships must be able to equip the corresponding consumable in order to mount these upgrades (e.g. Des Moines cannot mount Smoke Generator Modification 1 () and Gearing cannot mount Surveillance Radar Modification 1 ()); however, they are not automatically compatible with all ships that can mount certain consumables (Missouri cannot mount Surveillance Radar Modification 1 (), for example). They are mounted normally like other upgrades (i.e. you can only have one upgrade in a slot at a time).

Special upgrades that modify the effects of a corresponding consumable have no effect if that 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	Selling Price	Description	Notes
	Damage Control Party Modification 1	625,000	Increases Damage Control Party duration: +40% to duration of Damage Control Party ().	Tier VI-X ships and on battleship Arkansas Beta. (Not ARP or Dragon ships.)
	Spotting Aircraft Modification 1	625,000	Increases Spotting Aircraft duration: +30% to duration of Spotting Aircraft ().	Tier VI-X battleships and cruisers with the Spotting Aircraft consumable only.

Slot 2

Icon	Equipment Name	Selling Price	Description	Notes
	Engine Boost Modification 1	625,000	Increases Engine Boost duration: +50% to duration of Engine Boost ().	Tier VI-X ships with the Engine Boost consumable only.
	Defensive AA Fire Modification 1	625,000	Increases Defensive AA Fire duration: +20% to duration of Defensive AA Fire ().	Tier VIII-X ships with the Defensive AA Fire consumable only. (Not ARP Takao.)
	Hydroacoustic Search Modification 1	625,000	Increases Hydroacoustic Search duration: +20% to duration of Hydroacoustic Search ().	Tier VI-X destroyers and cruisers with the Hydroacoustic Search only. (Not ARP or Dragon ships.)
	Surveillance Radar Modification 1	625,000	Increases Surveillance Radar duration: +20% to duration of Surveillance Radar ().	Tier IX-X destroyers and cruisers with the Surveillance Radar consumable only.

Slot 3

Icon	Equipment Name	Selling Price	Description	Notes
	Smoke Generator Modification 1	625,000	Increases Smoke Generator duration: +30% to duration of Smoke Generator (). -5% to duration of smoke clouds produced by Smoke Generator.	Tier VI-X destroyers and cruisers with the Smoke Generator consumable only.

Unique Upgrades ("Legendary" Upgrades)

Unique (sometimes referred to as "Legendary") upgrades are Tier X ship-specific upgrades that are obtainable only through mission chains that relate to each Tier X ship available for credits in the tech tree. 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 gameplay. However, the unique upgrades are mounted into existing slots and have balancing parameters. They are meant to add to the variability of ship loadouts while keeping ships in balance with each other, even if one ship has the unique upgrade and another does not.

These upgrades are available for use in slots 5 and 6, depending on the ship in question. They are mounted normally like other upgrades (only one upgrade in a slot at a time) and can be sold, if desired. Be advised, though, that they cannot be re-earned; selling them is not recommended.

To obtain a unique upgrade, players must complete a chain of 5 combat missions in that ship. The chain is unlocked after playing one battle in a Tier X ship, and each step must be completed in sequential order. The missions are shared among all types of battles (even Co-Op) and are the same for all Tier X ships. Each ship must initiate their own chain, and can only progress their own missions.

Mission Chain to Earn Unique Upgrade Modules

• Mission 1: Earn 100,000 XP (after modifiers are applied).
• Mission 2: Earn 8,000,000.
• Mission 3: Earn 15,000 Free XP.
• Mission 4: Win 15 battles.
• Mission 5: Earn 40,000 base XP (before any modifiers are applied).

Slot 5

Icon	Equipment Name	Selling Price	Description	Notes	Restrictions
	Enhanced Damage Control System	2,500,000	–30% to flooding recovery time. –15% to fire extinguishing time. –70% to steering gears repair time. –30% to rudder shift time.	Available only via in-game missions.	Montana only.
	Enhanced Engineering Systems	2,500,000	+13% to main turrets traverse speed. –80% to steering gears repair time. –40% to rudder shift time.	Available only via in-game missions.	Conqueror only.
	Enhanced Repair Party	2,500,000	–20% to rudder shift time. –70% to flooding recovery time. –40% to fire extinguishing time. –50% to main battery repair time.	Available only via in-game missions.	Hindenburg only.
	Increased Firing Elevation of Artillery	2,500,000	–12% to main battery loading time. +8% to main battery maximum firing range. +10% to detectability.	Available only via in-game missions.	Henri IV only.
	Enhanced Smoke Generator	2,500,000	+150% to total smoke screen generation time. +10% to maximum dispersion of shells fired by the enemy attacking your ship. –5% to detectability range by sea. –15% to duration of smoke screen.	Available only via in-game missions.	Minotaur only.
	Enhanced Countermeasures	2,500,000	+10% to duration of Surveillance Radar (). +20% to duration of Hydroacoustic Search (). +20% to duration of Defensive AA Fire ().	Available only via in-game missions.	Worcester only.
	Heavyweight Artillery	2,500,000	–6% to main battery loading time. +8% to main battery maximum firing range. –13% to main turrets traverse speed.	Available only via in-game missions.	Khabarovsk only.
	Low-Profile Torpedo Tubes	2,500,000	–5% to detectability. –15% to torpedo tubes reload time.	Available only via in-game missions.	Z-52 only.
	Modified Hull	2,500,000	–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.	Available only via in-game missions.	Gearing only.
	Enhanced Armaments	2,500,000	–10% to main battery loading time. –10% to torpedo tubes reload time. –15% to duration of smoke screens. –15% to duration of Surveillance Radar ().	Available only via in-game missions.	Yueyang only.

Slot 6

Icon	Equipment Name	Selling Price	Description	Notes	Restrictions
	Additional Main Battery Loader	2,500,000	–18% to main battery loading time. –13% to main turrets traverse speed. –24% to main battery maximum firing range.	Available only via in-game missions.	République only.
	Enhanced Main Armaments	2,500,000	–15% to main battery loading time. –15% to secondary battery loading time. –7% to main turrets traverse speed. –8% to main battery maximum firing range.	Available only via in-game missions.	Großer Kurfürst only.
	Enhanced Main Battery Guns	2,500,000	–6% to main battery loading time –7% to maximum dispersion of main battery shells. –19% to main turrets traverse speed.	Available only via in-game missions.	Yamato only.
	Enhanced Main Battery and Steering Gears	2,500,000	–20% to rudder shift time. –7% to maximum dispersion of main battery shells. +8% to main battery maximum firing range.	Available only via in-game missions.	Zao only.
	Enhanced Propulsion	2,500,000	–50% to time taken to reach full power when accelerating (improved acceleration). –20% to rudder shift time. –10% to duration of Surveillance Radar ().	Available only via in-game missions.	Des Moines only. When combined with Propulsion Modification 2 (), the ship will accelerate from 0-27 knots in approximately 8 seconds.
	Heavyweight Main Battery Guns	2,500,000	–11% to maximum dispersion of main battery shells. +8% to main battery maximum firing range. –13% to main turrets traverse speed.	Available only via in-game missions.	Moskva only.
	Accelerated Torpedo Tube Reload	2,500,000	–25% to torpedo tube reload time. +50% to risk of torpedo tubes becoming incapacitated. –80% to torpedo tube traverse speed.	Available only via in-game missions.	Shimakaze only.
	Recoilless Main Battery Guns	2,500,000	–18% to main battery loading time. –7% to main turrets traverse speed. +10% to torpedo tube reload time.	Available only via in-game missions.	Grozovoi only.
	Reinforced Armor Protection for Strike Air Groups	2,500,000	+30% to attack aircraft HP. –5% to aircraft cruise speed.	Available only via in-game missions.	Midway only.
	Enhanced Flight Control and Air Groups	2,500,000	+5% to aircraft cruise speed. +10% to fighters HP.	Available only via in-game missions.	Hakuryu only.