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Destroyer | U.K. | Tier VIII
Tech Tree Position
Purchase pricepromo Doubloons
Hit Points15,200 
Main Battery
120 mm/45 Mk.IX on a CPXIX mount4 х 2 pcs.
Rate of Fire12 shots/min.
Reload Timesec.
Rotation Speed20 deg./sec.
180 Degree Turn Timesec.
Firing Range11.89 km.
Maximum Dispersion104 m.
HE Shell120 mm HE 
Maximum HE Shell Damage1,700 
Chance of Fire on Target Caused by HE Shell%
Initial HE Shell Velocity808 m./s.
HE Shell Weight22.68 kg.
AP Shell120 mm AP 
Maximum AP Shell Damage2,100 
Initial AP Shell Velocity808 m./s.
AP Shell Weight22.68 kg.
Torpedo Tubes
533 mm QR Mk II1 х 4 pcs.
Rate of Fire0.91 shots/min.
Reload Time66 sec.
Rotation Speed25 deg./sec.
180 Degree Turn Time7.2 sec.
Torpedo533 mm Mk IXM 
Maximum Damage16,767 
Torpedo Speed62 knot
Torpedo Range9.99 km.
AA Defense
40 mm/39 Vickers QF Mk.VIII on a Mk.VII mount1 х 4 pcs.
. . . Average Damage per Second12.9 
. . . Firing Range2.49 km.
12.7 mm Mk.III2 х 4 pcs.
. . . Average Damage per Second4.2 
. . . Firing Range1.2 km.
Maximum Speed36 knot
Turning Circle Radius610 m.
Rudder Shift Time3.6 sec.
Surface Detectability Range6.76 km.
Air Detectability Range3.12 km.
Battle Levels

Cossack — British promo premium Tier VIII destroyer.

One of the renowned Tribal-class destroyers with an emphasis on gunnery over torpedo warfare. During World War II, the ship's AA defenses were reinforced at the cost of one main gun mount.

Cossack was first released for sale in late September 2018.


Main Battery Guns Rate of Fire
180° Turn Time
Maximum Dispersion
Maximum HE Shell Damage
Chance of Fire on Target Caused by HE Shell
Maximum AP Shell Damage
Research price
Purchase price
120 mm/45 Mk.IX on a CPXIX mount1291041,70082,100 00
Hull Hit Points
Main Turrets
Secondary Gun Turrets
AA Mounts
Torpedo Tubes
Hangar Capacity
Research price
Purchase price
Cossack15,20062042/11 00
Torpedoes Rate of Fire
Torpedo Tubes Reload Time
180° Turn Time
Maximum Damage
Torpedo Speed
Torpedo Range
Research price
Purchase price
533 mm Mk IXM0.9667.216,7666210 00
Fire Control System Firing Range Increase
Maximum Firing Range
Research price
Purchase price
Mk VIII mod. 1011.9 00
Engine Maximum Speed
Research price
Purchase price
Propulsion: 44,000 hp36 00

Compatible Upgrades

 Slot 1  Main Armaments Modification 1 Auxiliary Armaments Modification 1 Magazine Modification 1 Damage Control Party Modification 1
 Slot 2  Damage Control System Modification 1 Engine Boost Modification 1 Hydroacoustic Search Modification 1 Engine Room Protection
 Slot 3  Main Battery Modification 2 AA Guns Modification 1 Aiming Systems Modification 1 Smoke Generator Modification 1 Torpedo Tubes Modification 1
 Slot 4  Damage Control System Modification 2 Steering Gears Modification 1 Depth Charges Modification 1
 Slot 5  Torpedo Lookout System Concealment System Modification 1 Steering Gears Modification 2 Ship Consumables Modification 1

Player Opinion


Warning. The data presented in the AA Defense sidebar section may be incorrect.
For a graphic summary of ships Tiers VIII thru XI see LittleWhiteMouse's "Actual AA DPS".

Tier VIII Premium Cossack is a comfortable blend of firepower and concealment. Captains will notice many similarities between Cossack and Tier VII Premium Commonwealth destroyer Haida. Her performance is very similar and she shares many of the same strength and weaknesses as her sister ship. The most obvious difference between the two ships if the number of main battery rifles, with Cossack bringing an extra pair of them to the fight.

The guns on Cossack are plentiful and provide the ship with excellent firepower, although captains will note the firing angles on the 'Y' turret are quite poor; Cossack must expose a lot of her profile in order to bring all four turrets into a fight. However, when she does manage to get all her guns firing, she boasts an impressive damage rate with her HE shells (complimented by a base fire chance of 8%). This presents Cossack with almost unrivaled gun power for her tier, capable of quickly dispatching of destroyers that get caught out by her good concealment.

Cossack’s Smoke GeneratorWhile active, generates a smoke screen that blocks line-of-sight for both enemies and teammates. provides her with a quick smoke screen which will allow her to bring her guns into play before before she is forced to move on by the relatively short duration of her smoke. This does, however, promote usage of her smoke primarily for defensive play, as she is able to deploy it to quickly break line of sight with pursuing enemy ships. Captains of Cossack will find that because of the relatively short smoke duration they are forced to re-position frequently, but her excellent concealment blends well with this.

Cossack also gains access to a Hydroacoustic SearchWhile active, detects all enemy ships and torpedoes within the specified radius, without regard of obstacles such as smoke and terrain.; however, she trades most of its offensive usability for defensive flexibility. Despite being very short-ranged (only 3.0 km), it provides plenty of forewarning about hostile torpedoes. The long duration of this consumable helps to ensure Cossack captains are almost never caught out by hostile torpedoes, able to keep themselves safe during prolonged confrontations. Captains may also opt to use her hydro in a more aggressive manner by pushing close to enemy smoke screens that may have destroyers lurking within, but the short range of her hydro makes doing so a fairly risky play. However, the Hydroacoustic SearchWhile active, detects all enemy ships and torpedoes within the specified radius, without regard of obstacles such as smoke and terrain. is less than ideal for this task as it falls short on spotting range when compared to that of other destroyers at her tier, such as German Z-23 or Pan-Asian Loyang.

Another of Cossack’s key strengths is her excellent concealment. Her low base detection range allows her to deal with enemy destroyers while providing her with the flexibility to control an engagement, choosing when and where to open fire. Her concealment provides her with a buffer zone against other destroyers, allowing Cossack to evade ships which outgun her, while outgunning ships which out-spot her. Her smoke screen benefits her when used to enable such a play style, allowing her to break detection and disengage if required.

Things are not all smooth sailing for Cossack though, and she has a few glaring weaknesses. Her foremost issue is her torpedoes, which — although good — are lacking in quantity, as she mounts only a single quadruple-tube launcher. On top of this, the restrictive gun angles of her main battery can also limit the true effectiveness of her guns during close quarter duels. This, when combined with her relatively small health pool can make close quarter duels a somewhat risky business. Lastly, her anti-aircraft defenses are inadequate even for self-defense, so captains must fall back to their team for defense against enemy air attacks.

Captains of Cossack will find the most success using her concealment to sneak upon unsuspecting destroyers and from here pushing into a knife fight to secure the kill. This will allow her to ensure her guns land as many hits as possible, using a mix of her single launch torpedoes and high DPM main battery. Careful and calculated usage of her Smoke GeneratorWhile active, generates a smoke screen that blocks line-of-sight for both enemies and teammates. will allow captains to effectively fight or flee from any enemy ships will allow Cossack to best perform her role as a defensive scout, providing spotting for the team and probing around caps while remaining close to friendly ships to deter attacks from hostile destroyers.


  • Eight main guns in four twin turrets with good rate of fire and very quick turret traverse
  • Good torpedo damage, range and reload speed
  • Excellent concealment, as low as 5.5km with all the relevant upgrades
  • Access to a long lasting Hydroacoustic SearchWhile active, detects all enemy ships and torpedoes within the specified radius, without regard of obstacles such as smoke and terrain. consumable
  • The Smoke GeneratorWhile active, generates a smoke screen that blocks line-of-sight for both enemies and teammates. consumable has many charges and reloads quickly



As a Premium ship, Cossack doesn't have any upgrades to research.

Optimal Configuration


The recommended upgrades for Cossack are as follows:

Also for Slot 2 the Hydroacoustic Search Modification 1 Increases the action time of the Hydroacoustic Search and Short-Range Hydroacoustic Search consumables.: +20% action time. special upgrade provides a 20% (36 second) action time boost to Hydro. And the Engine Boost Modification 1 Increases the action time of the Engine Boost and Emergency Engine Power consumables.: +50% action time. special upgrade provides a 30% (36 second) action time boost to Engine Boost. Both are viable and may match your play style better than the alternatives.

Commander Skills

Key skills for Cossack commanders include Last Stand and Concealment Expert.


Cossack equips the following consumables:


As a premium ship, Cossack comes with Default permanent camouflage and a set of permanent combat bonuses.


Cossack captains should mount standard signal flags to improve the ship's performance in battle. Sierra Mike (+5% to the ship's maximum speed.) signal flags are highly recommended to increase the ship's top speed. Victor Lima (+1% chance of causing a fire for bombs and shells with a caliber above 160mm / +0.5% chance of causing a fire for bombs and shells with a caliber below 160mm. / +4% chance of causing flooding.) and India X-Ray (+1% chance of causing a fire for bombs and shells with a caliber above 160mm. / +0.5% chance of causing a fire for bombs and shells with a caliber below 160mm. / +5% to the risk of your ship's magazine detonating.) flags can be mounted to improve the ship's main battery fire chance. November Foxtrot (-5% reload time on all consumables.) is also recommended to reduce consumable cooldown timers.

Note: Use of the Juliet Charlie signal makes detonation impossible.


Historical Info

Historical Gallery


  1. 1.0 1.1 Originally released with standard RN Smoke and Hydro.

Ship Change Log

See here for links to Update notes.

  • Available for testing by supertesters in the game starting from Update 0.7.7.
  • First appeared on sale in September 2018.
  • Update 0.7.10:
    • The reload time of the standard Smoke Generator I consumable was fixed to 105 s.
    • Fixed a bug that led to a lower speed on corners with the "Engine Boost" consumable activated than without it.
  • Update 0.7.11:
    • Torpedo tubes reload time decreased from 96 to 66 s.
    • Turret traverse speed was increased from 10 to 20 degrees per second. (Main battery 180 degree turn time decreased from 18 to 9 s).
  • Update 0.9.11:
    • Fixed geometry and textures of the ship.

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