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.

Only up to one upgrade may be mounted in each slot. An upgrade may be sold for half of its purchase cost. Alternatively, an upgrade may be demounted for 25 doubloons regardless of its purchase cost. When selling a ship, all upgrades mounted on that ship must either be sold or demounted.

Tier I+ Equipment (Slot 1)

Icon	Equipment Name	Cost	Description	Notes
	Main Armaments Modification 1	125000	Increases survivability and accelerates repairs of 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 effectiveness of aircraft guns: +10% to average damage per second of aircraft guns.	Applicable to Fighter aircraft; useful for aircraft carriers only.
	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 denotation: -70% to the risk of your ship's magazine detonation.
	Aiming Systems Modification 0	125000	Increases firing accuracy of the secondary battery and main battery, accelerates traverse speed of torpedo tubes and extends 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 4)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control System Modification 1	250000	Reduces the risk of flooding or fire: -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 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 steering gears: -20% to the steering gears repair time. -20% to the risk of the steering gears becoming incapacitated.

Tier V+ Equipment (Slot 2)

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 firing accuracy of the secondary battery and main battery, accelerates traverse speed of torpedo tubes and extends 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.
	Flight Control Modification 1	500000	Accelerates aircraft servicing: -10% to aircraft servicing time.	Stacks with Torpedo Armament Expertise. Applicable to aircraft; useful for aircraft carriers only.
	Air Groups Modification 2	500000	Increases fighters HP: +20% to fighter survivability	Applicable to Fighter aircraft; useful for aircraft carriers only.
	AA Guns Modification 2	500000	Extends firing range of AA mounts: +20% to AA mounts maximum firing range.	Stacks with Advanced Firing Training.
	Secondary Battery Modification 2	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 5)

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.	Improves acceleration from 0-6 knots only. Does not improve acceleration in reverse, only forward. 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.

Tier VIII+ Equipment (Slot 6)

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	Reduces ship detectability range: -10% to detectability radius. +5% to the maximum dispersion of enemy shells that fire on 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 carriers.

Tier IX+ Equipment (Slot 3)

Icon	Equipment Name	Cost	Description	Notes
	Main Battery Modification 3	3000000	Decreases main battery loading 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 firing range of the main battery: +16% to main battery maximum firing range.	Stacks with Advanced Firing Training. Not available to Russian destroyers.
	Artillery Plotting Room Modification 2	3000000	Increases firing accuracy of main battery: -11% to maximum dispersion of main battery.	Available only to American battleships.
	Flight Control Modification 2	3000000	Increases aircraft speed: +5% to maximum aircraft speed.
	Air Groups Modification 3	3000000	Increases attack aircraft HP: +15% to attack aircraft survivability.	Applicable to Torpedo Bomber and Dive Bomber aircraft; useful for aircraft carriers only.
	AA Guns Modification 3	3000000	Increases AA effectiveness: +25% to average damage per second of AA mounts.	Affects damage per second of all AA guns. Stacks with Basic Firing Training.
	Secondary Battery Modification 3	3000000	Decreases secondary battery loading time: -20% to secondary battery loading time.	Stacks with Basic Firing Training.

Special Upgrades

Super upgrades are special upgrades obtainable only through supercontainers. 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 (you can only have one upgrade in a slot at a time).

Tier I+ (Slot 1)

Icon	Equipment Name	Cost	Description	Notes
	Damage Control Party Modification 1	N/A	Increases Damage Control Party duration: +40% to duration of Damage Control Party.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.
	Spotting Aircraft Modification 1	N/A	Increases Spotting Aircraft duration: +30% to duration of Spotting Aircraft.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.

Tier V+ (Slot 2)

Icon	Equipment Name	Cost	Description	Notes
	Smoke Generator Modification 1	N/A	Increases Smoke Generator duration: +30% to duration of Smoke Generator. -5% to duration of smoke clouds produced by Smoke Generator.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.

Tier III+ (Slot 4)

Icon	Equipment Name	Cost	Description	Notes
	Engine Boost Modification 1	N/A	Increases Engine Boost duration: +50% to duration of Engine Boost.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.
	Defensive AA Fire Modification 1	N/A	Increases Defensive AA Fire duration: +20% to duration of Defensive AA Fire.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.
	Hydroacoustic Search Modification 1	N/A	Increases Hydroacoustic Search duration: +20% to duration of Hydroacoustic Search.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.
	Surveillance Radar Modification 1	N/A	Increases Surveillance Radar duration: +40% to duration of Surveillance Radar.	This modification is normally only available via the Container system or as a reward from Ranked Battles, but it can also be purchased in the Clash of the Elements Gift Shop as part of the special event.