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?__NOTOC____NOEDITSECTION__+<!-- The 'expand' variable controls whether the collapsible sections (b_popup class) below default to collapsed ("none") or expanded ("block").
?{{Video|SCHNDox0BRM|width=375|Learn more about flooding.}}+-->{{#if:{{#var:expand}}|<!--If it's already defined, don't mess with it.-->|{{#vardefine:expand|none}}{{block|!!|content=Some browsers may not be able to expand the tables below.<br>If you have trouble viewing them there is a fully expanded version of this page '''[[{{FULLPAGENAME}}/expanded|here]]'''.}} }}
 +{{Video|SCHNDox0BRM|width=375|Learn more about flooding. 16 May 2019}}
 [[File:418_ribbon_flood.png|right|thumb|The "Flooding" ribbon is awarded for causing flooding to an enemy ship.]] [[File:418_ribbon_flood.png|right|thumb|The "Flooding" ribbon is awarded for causing flooding to an enemy ship.]]
 {{AnnoWiki|content= {{AnnoWiki|content=
?[[File:239_icon_flooding.png|left]]'''Flooding''' in World of Warships is a damage-over-time effect that occurs due to damage taken below the waterline, most commonly from being struck by enemy torpedoes. Ships that are undergoing flooding do not list in-game as they would in real life, but do have their top speed reduced by approximately 20% in addition to the damage-over-time effect.}}+[[File:239_icon_flooding.png|left]]'''Flooding''' in World of Warships is a damage-over-time effect that occurs due to damage taken below the waterline, most commonly from being struck by enemy torpedoes. Ships that are undergoing flooding do not list in-game as they would in real life, but do have their top speed reduced by approximately 30% in addition to the damage-over-time effect.}}
  
?==Causing Flooding==+__TOC__ <!-- __NOEDITSECTION__ -->
  
?Only two effects have a chance to cause a ship to flood:+== Causing Flooding ==
 + 
 +Only three effects have a chance to cause a ship to flood:
  
 * Being struck by an enemy [[Torpedoes (WoWS)|torpedo]]. * Being struck by an enemy [[Torpedoes (WoWS)|torpedo]].
 * Being [[ship:Ramming|rammed]] by an enemy ship. * Being [[ship:Ramming|rammed]] by an enemy ship.
 +* Being hit by a depth charge as a submarine.
 +It is impossible to cause a flooding on an allied ship.<ref>[https://worldofwarships.eu/en/news/game-updates/update-076-night-battle/#misc Update 0.7.6.]</ref> Underwater shell hits can cause damage but do not cause flooding.
 +
 +A ship is immune from flooding during the action time of its {{Damage Control Party}}.
  
 [[File:Torpedo_protection.png|thumb|A ship's torpedo protection is shown in the Port screen under the Survivability tab. If no value is shown, it is zero.]] [[File:Torpedo_protection.png|thumb|A ship's torpedo protection is shown in the Port screen under the Survivability tab. If no value is shown, it is zero.]]
?A ribbon is awarded when a flood is caused to an enemy ship. Though captains may be awarded multiple flooding ribbons, it is not possible for a ship to suffer from the effects of more than two floods concurrently: one forward and one aft. This is distinctly different from [[Ship:Fire|fires]], where a ship can suffer from up to four simultaneous fires that stack their damage-over-time effects together.+A ribbon is awarded when a flood is caused to an enemy ship. Though captains may be awarded multiple flooding ribbons, it is not possible for a ship to suffer from the effects of more than two floods concurrently: one forward and one aft. In the case of submarines, only one active flood in possible, in the amidship section.
  
 ==Flooding Chance== ==Flooding Chance==
?The probability of a ship flooding depends on where it is struck by the torpedo (or rammed by the enemy ship), the presence of [[Ship:Upgrades|upgrades]] on the damaged ship (specifically, Damage Control System Modification 1), and the [[Ship:Flags#Signals|signals]] mounted on the attacking ship: Juliet Whiskey Unaone ({{Juliet Whiskey Unaone|Size=18px}}) increases the chance of causing a flood by 15%; Victor Lima ({{Victor Lima|Size=18px}}) increases it by 4%.  
  
?All ships — except destroyers — have torpedo protection for their citadel. As a result, the chance of flooding and damage are reduced even if the ship doesn't have "Torpedo Protection" displayed on the Port screen. Destroyers do not have any torpedo protection, and the torpedo damage reduction bonus of {{Damage Control System Modification 1}} will not work properly when the upgrade is mounted on a destroyer..+Ramming causes flooding in the impacted section if the ram causes 10% or more damage to the ship.
  
?In order to calculate the flood chance of a given torpedo versus a given ship, the following formula is utilized:+The probability of a ship flooding from a torpedo strike depends on:
 +:* the base flooding chance of the torpedo,
 +:* the presence and quality of a Torpedo Protection System,
 +:* where the ship is struck,
 +:* the presence of upgrades and signals mounted on the ships,
 +:* the skills possessed by the attacking and defending commanders.
  
?{{AnnoWiki|content=If the torpedo hits an anti-torpedo bulge:+All ships — except destroyers and submarines — have torpedo protection for their citadel. As a result, the chance of flooding and damage are reduced even if the ship doesn't have "Torpedo Protection" displayed on the Port screen. Destroyers and submarines do not have any torpedo protection, so the torpedo damage reduction bonus of {{Damage Control System Modification 1}} will not function when the upgrade is mounted on a destroyer. (Yet another argument in favor of {{Engine Room Protection}}.)
?'''Flood Chance = (1 - [Torpedo Protection]) x (1 - DCM1) x 0.33 x [Torpedo Flood Chance] x (1 + {{Victor Lima|Size=18px}}) x (1 + {{Juliet Whiskey Unaone|Size=18px}})'''+
?<br>Otherwise:+
?'''Flood Chance = [Torpedo Flood Chance] x (1 + {{Victor Lima|Size=18px}}) x (1 + {{Juliet Whiskey Unaone|Size=18px}})'''+
?}}+
  
?* The value of "Torpedo Protection" varies by ship and is displayed in the Port screen. +=== Base chance ===
?* The value of "DCM1" is 0.03 if the appropriate [[Ship:Upgrades#Tier_III.2B_Equipment_.28Slot_4.29|upgrade]] is installed; otherwise, it is 0.+ 
?* "Torpedo Flood Chance" values can be found in the tables below.+Flood chance when striking anywhere but the ship's anti-torpedo belt.
 + 
 +<center>'''<span style="font-size:110%;">FC<sub>B</sub> = FC<sub>T</sub> &bull; S<sub>VL</sub> &bull; S<sub>JWU</sub> &bull; K<sub>LQ</sub></span>'''</center>
 +Where:
 +::* FC<sub>B</sub> - Base flooding chance
 +::* FC<sub>T</sub> - Torpedo flood chance (from the tables below)
 +::* S<sub>VL</sub>&nbsp; = '''1.04''' if the attacking ship flies the Victor Lima {{Victor Lima|Size=18px}} signal flag, else 1
 +::* S<sub>JWU</sub> = '''1.15''' if the attacking ship flies the Juliet Whiskey Unaone {{Juliet Whiskey Unaone|Size=18px}} signal flag, else 1
 +::* K<sub>LQ</sub>&nbsp; = '''1.30''' if the attacking commander has the [[Ship:List_of_Commander_Skills#D_Liquidator|''Liquidator'']] skill, else 1
 +<br />
 + 
 +=== Against a Torpedo Protection System ===
 + 
 +Flood chance when striking a ship's anti-torpedo belt
 + 
 +<center>'''<span style="font-size:110%;">FC<sub>TP</sub> = FC<sub>B</sub> &bull; 0.33 &bull; U<sub>DCS</sub> &bull; (1 - (TP + K<sub>TP</sub> - K<sub>PF</sub>))</span>'''
 +</center>
 +Where:
 +::* FC<sub>TP</sub> - Flooding chance against a ship's Torpedo Protection system
 +::* FC<sub>B</sub> - Base flooding chance
 +::* U<sub>DCS</sub> - '''0.97''' if the {{Damage Control System Modification 1}} upgrade is mounted and the ship is not a destroyer, else 1
 +::* TP - Damage reduction of the ship's Torpedo Protection system (ship specific; roughly 0-50%)
 +::* K<sub>TP</sub> - '''0.07''' if the defending commander has the [[Ship:List_of_Commander_Skills#B_Vigilance|''Vigilance'']] skill, else 0
 +::* K<sub>PF</sub> - '''0.10''' if the attacking commander has the [[Ship:List_of_Commander_Skills#A_Proximity Fuze|''Proximity Fuze'']] skill, else 0
  
?<div class="b-popup"><div class="b-popup_head js-tech-nav_head"><div><h3>Ship-Launched Torpedo Data</h3></div><span class="b-tech-nav_arrow"></span></div><div class="b-popup_content" style="display:none;"><div>+<div class="b-popup"><div class="b-popup_head js-tech-nav_head"><div><h3>Ship-Launched Torpedo Data</h3></div><span class="b-tech-nav_arrow"></span></div><div class="b-popup_content" style="display:{{#var:expand}}; overflow:auto;"><div>
 {{Ship:Torpedo Data}} {{Ship:Torpedo Data}}
 </div></div></div> </div></div></div>
  
?<div class="b-popup"><div class="b-popup_head js-tech-nav_head"><div><h3>Aerial Torpedo Data</h3></div><span class="b-tech-nav_arrow"></span></div><div class="b-popup_content" style="display:none;"><div>+<div class="b-popup"><div class="b-popup_head js-tech-nav_head"><div><h3>Aerial Torpedo Data</h3></div><span class="b-tech-nav_arrow"></span></div><div class="b-popup_content" style="display:{{#var:expand}}; overflow:auto;"><div>
 {{Ship:Aerial Torpedo Data}} {{Ship:Aerial Torpedo Data}}
 </div></div></div> </div></div></div>
 <!-- <!--
?{{block|i|content=As an example, we can compare the flood chance of a Type 93 mod. 3 torpedo from ''[[Shimakaze]]'' against ''[[Yamato]]''’s vaunted torpedo protection. The ''Yamato'' has Damage Control Modification 1 installed. The ''Shimakaze'' commander is flying both the Victor Lima ({{Victor Lima|Size=18px}}) and Juliet Whiskey Unaone ({{Juliet Whiskey Unaone|Size=18px}}) signals. The flood chance would be:+{{block|i|content=As an example, we can compare the flood chance of a Type 93 mod. 3 torpedo from ''[[Shimakaze]]'' against ''[[Yamato]]''’s vaunted torpedo protection. The ''Yamato'' has Damage Control System Modification 1 installed. The ''Shimakaze'' commander is flying both the Victor Lima ({{Victor Lima|Size=18px}}) and Juliet Whiskey Unaone ({{Juliet Whiskey Unaone|Size=18px}}) signals. The flood chance would be:
? +
  
 '''( 0.15 x 0.97 ) x [ (4.06) + (0.15) + (0.04) ] = 61.84% flood chance''' '''( 0.15 x 0.97 ) x [ (4.06) + (0.15) + (0.04) ] = 61.84% flood chance'''
? 
  
 If the ''Shimakaze'' was to de-mount the signal flags, the flood chance would be: If the ''Shimakaze'' was to de-mount the signal flags, the flood chance would be:
? 
  
 '''( 0.15 x 0.97 ) x [ 4.06 ] = 59.07% flood chance''' '''( 0.15 x 0.97 ) x [ 4.06 ] = 59.07% flood chance'''
  
? +If the same ''Shimakaze'' was to attack a ''[[Montana]]'' that did not have Damage Control System Modification 1 installed, the flood chance would be:
?If the same ''Shimakaze'' was to attack a ''[[Montana]]'' that did not have Damage Control Modification 1 installed, the flood chance would be:+
? +
  
 '''( 0.21 x 1 ) x [ 4.06 ] = 85.26% flood chance''' '''( 0.21 x 1 ) x [ 4.06 ] = 85.26% flood chance'''
 }} --> }} -->
  
?==Flooding Effects==+== Flooding Effects ==
 + 
 [[File:Затопление_значок.jpg|thumb|The user interface will display this icon — overlayed with the remaining duration — when a ship is experiencing flooding.]]  [[File:Затопление_значок.jpg|thumb|The user interface will display this icon — overlayed with the remaining duration — when a ship is experiencing flooding.]]
?Aircraft carriers, destroyers, and cruisers take 0.25% hit points of damage per second per flood; ''[[Kronshtadt]], [[Stalingrad]], [[Alaska]], [[Azuma]]'', and all battleships take 0.5% hit points of damage per second per flood; and ''[[Admiral Graf Spee]]'' takes 0.375% hit points of damage per second per flood.+There are two parts of the ship that can flood &mdash; the forward half and the aft half. Thus there can be two simultaneous floods (only one with submarines).
  
?Flooding has a base duration of '''30 seconds''' for carriers and '''40 seconds''' for the other classes. A full duration flood on a battleship would deal 20% of its total health pool in damage, 11% more than a fire. This ratio is holds steady for all classes. +Aircraft carriers, destroyers, and cruisers take 0.25% hit points of damage per second per flood; battleships and large cruisers<ref name="large" /> take 0.5% hit points of damage per second per flood; ''[[Admiral Graf Spee]]'' takes 0.375% hit points of damage per second per flood; and submarines take 0.33% hit points of damage per second per flood.
  
?In addition, ships that are flooding have their top speed reduced by 30% at full speed forward, and 60% and at reverse.+In addition, ships that are flooding have their top speed reduced by 30% at full speed forward, and 60% at reverse.
  
?==Controlling Flooding==+=== Controlling and Repairing Flooding ===
?The effects of flooding can only be removed by utilization of the {{Damage Control Party}} consumable, or by waiting for the flood duration timer to expire. There are two sections of the ship that can take floods: one forward and one aft. Flooding duration can be reduced several ways:+
  
?* Equipping [[Ship:Upgrades#Tier_VI.2B_Equipment_.28Slot_5.29|Damage Control Modification 2]] will reduce the duration by 15%.+Flooding can be stopped in one of two ways:
?* Using a commander with the Level 3 commander skill [[Ship:Commander#List of Endurance Skills|Basics of Survivability]] will reduce the duration by 15%.+* activating the {{Damage Control Party}} consumable,
?* Flying the Juliet Yankee Bissotwo [[Ship:Flags#Signals|signal]] ({{Juliet Yankee Bissotwo|Size=18px}}) will reduce the duration by 20%. +* or waiting for the flood duration timer to expire.
  
?Each of these effects stacks with the others; however, they are multiplicative rather than cumulative.+All damage sustained by flooding is 100% recoverable by ships that can use the {{Repair Party}} consumable.
  
?{{block|i|content= For example, if all three effects are stacked, the flooding duration is: '''40 seconds x 0.85 x 0.85 x 0.80 = 23.12 seconds'''.}}+=== Flooding Duration ===
  
?The below table provides the flood durations and total health loss for the different combinations of the above three effects.+Flooding has a base duration of '''30 seconds''' for carriers and submarines and '''40 seconds''' for the other classes.
 + 
 +Flooding duration cannot be extended by subsequent strikes on a part of the ship that is already flooding. Otherwise, flooding duration can be altered in several ways:
 + 
 +* Activation of the Damage Control Party will stop flooding immediately.
 +* Equipping Slot 4 upgrade [[Ship:Upgrades#Damage_Control_System_Modification.C2.A02|Damage Control System Modification 2]] will reduce the duration by 15%.
 +* A battleship commander's [[Ship:List_of_Commander_Skills#B_Basics_of_Survivability|Basics of Survivability]] skill will reduce the duration by 15%.
 +* In contrast, the [[Ship:List_of_Commander_Skills#B_Super-Heavy_AP_Shells|Super-Heavy AP Shells]] battleship skill will extend the duration by 30%.
 +* Flying the Juliet Yankee Bissotwo {{Juliet Yankee Bissotwo|Size=18px}} signal will reduce the duration by 20%.
 + 
 +Each of these effects stacks with the others; however, they are multiplicative rather than additive.
 + 
 +{{block|i|content= For example, if Damage Control System Modification 2 and Juliet Yankee Bissotwo are stacked, the flooding duration is:<br /> '''40 seconds x 0.85 x 0.80 = 27.2 seconds'''.}}
 + 
 +The below tables provides the flood durations and total health loss for the different combinations of the modifiers. Full flood duration uninterrupted by Damage Control Party is assumed.
 <center> <center>
 {|class = "wikitable" style="text-align:center;" {|class = "wikitable" style="text-align:center;"
?|+ Flooding Impacts to Aircraft Carriers+|+ Flooding Impact to Aircraft Carriers&nbsp;&nbsp; (0.25% HP/sec)
?! style="vertical-align:middle; width:300px" | Modifiers+! style="vertical-align:middle; width:240px" | Modifiers
?! style="vertical-align:middle; width:175px" | Total Damage +! style="vertical-align:middle; width:150px" | Duration
?! style="vertical-align:middle; width:175px" | Duration+! style="vertical-align:middle; width:175px" | Single Flood
 +! style="vertical-align:middle; width:175px" | Double Flood
 |- |-
?| Total damage +| none
 +| 30 seconds
 | 7.5% of base health  | 7.5% of base health
?| 30 seconds+| 15% of base health
 |- |-
?| With one -15% modifier +| With a -15% modifier
?| 6.25% of base health +| 25.5 seconds
?| 25 seconds+| 6.38% of base health
 +| 12.75% of base health
 |- |-
 | With a -20% modifier  | With a -20% modifier
?| 6.0% of base health  
 | 24 seconds | 24 seconds
 +| 6% of base health
 +| 12% of base health
 |- |-
?| With two -15% modifiers +| With both modifiers
?| 5.25% of base health +
?| 21 seconds+
?|-+
?| With one -15% modifier and a -20% modifier +
?| 5.0% of base health +
 | 20 seconds | 20 seconds
?|-+| 5.1% of base health
?| With two -15% modifiers and a -20% modifier +| 10.2% of base health
?| 4.25% of base health +
?| 147 seconds+
 |} |}
  
  
 {|class = "wikitable" style="text-align:center;" {|class = "wikitable" style="text-align:center;"
?|+ Flooding Impacts to Battleships and Large Cruisers<ref>This group includes ''[[Stalingrad]]'', ''[[Kronshtadt]]'', ''[[Alaska]]'', and ''[[Azuma]]''.</ref>+|+ Single-Flood Impact to Battleships&nbsp;&nbsp; (0.5% HP/sec)
?! style="vertical-align:middle; width:300px" | Modifiers+! style="vertical-align:middle; width:240px" | Modifiers
 +! style="vertical-align:middle; width:150px" | Duration
 ! style="vertical-align:middle; width:175px" | Total Damage  ! style="vertical-align:middle; width:175px" | Total Damage
?! style="vertical-align:middle; width:175px" | Duration 
 |- |-
?| Total damage +| none
 +| 40 seconds
 | 20.0% of base health  | 20.0% of base health
?| 40 seconds 
 |- |-
?| With one -15% modifier +| -15%
 +| 34 seconds
 | 17.0% of base health  | 17.0% of base health
?| 34 seconds 
 |- |-
?| With a -20% modifier +| -20%
 +| 32 seconds
 | 16.0% of base health  | 16.0% of base health
?| 32 seconds 
 |- |-
?| With two -15% modifiers +| -15%, -15%
?| 14.0% of base health +| 28.9 seconds
?| 28 seconds+| 14.5% of base health
 |- |-
?| With one -15% modifier and a -20% modifier +| -15%, -20%
?| 13.5% of base health +| 27.2 seconds
?| 27 seconds+| 13.6% of base health
 |- |-
?| With two -15% modifiers and a -20% modifier +| -15%, -15%, -20%
?| 11.5% of base health +| 23.1 seconds
?| 23 seconds+| 11.6% of base health
 +|-
 +| +30%
 +| 52 seconds
 +| 26.0% of base health
 +|-
 +| -15%, +30%
 +| 44.2 seconds
 +| 22.1% of base health
 +|-
 +| -20%, +30%
 +| 41.6 seconds
 +| 20.8% of base health
 +|-
 +| -15%, -15%, +30%
 +| 37.6 seconds
 +| 18.8% of base health
 +|-
 +| -15%, -20%, +30%
 +| 35.4 seconds
 +| 17.7% of base health
 +|-
 +| -15%, -15%, -20%, +30%
 +| 30.1 seconds
 +| 15.0% of base health
 |} |}
  
  
 {|class = "wikitable" style="text-align:center;" {|class = "wikitable" style="text-align:center;"
?|+ Flooding Impacts to ''[[Admiral Graf Spee]]''+|+ Single-Flood Impact to Large Cruisers<ref name="large">This group includes {{LargeCruiserList}}.</ref>&nbsp;&nbsp; (0.5% HP/sec)
?! style="vertical-align:middle; width:300px" | Modifiers+! style="vertical-align:middle; width:240px" | Modifiers
 +! style="vertical-align:middle; width:150px" | Duration
 ! style="vertical-align:middle; width:175px" | Total Damage  ! style="vertical-align:middle; width:175px" | Total Damage
?! style="vertical-align:middle; width:175px" | Duration 
 |- |-
?| Total damage +| none
?| 15.0% of base health +
 | 40 seconds | 40 seconds
 +| 20.0% of base health
 |- |-
?| With one -15% modifier +| With a -15% modifier
?| 12.75% of base health +
 | 34 seconds | 34 seconds
 +| 17.0% of base health
 |- |-
 | With a -20% modifier  | With a -20% modifier
?| 12.0% of base health  
 | 32 seconds | 32 seconds
 +| 16.0% of base health
 |- |-
?| With two -15% modifiers +| With both modifiers
?| 10.5% of base health +| 27.2 seconds
?| 28 seconds+| 13.6% of base health
 +|}
 + 
 + 
 +{|class = "wikitable" style="text-align:center;"
 +|+ Single-Flood Impact to ''[[Admiral Graf Spee]]''&nbsp;&nbsp; (0.375% HP/sec)
 +! style="vertical-align:middle; width:240px" | Modifiers
 +! style="vertical-align:middle; width:150px" | Duration
 +! style="vertical-align:middle; width:175px" | Total Damage
 |- |-
?| With one -15% modifier and a -20% modifier +| none
?| 10.125% of base health +| 40 seconds
?| 27 seconds+| 15.0% of base health
 +|-
 +| With a -15% modifier
 +| 34 seconds
 +| 12.75% of base health
 +|-
 +| With a -20% modifier
 +| 32 seconds
 +| 12.0% of base health
 |- |-
?| With two -15% modifiers and a -20% modifier +| With both modifiers
?| 8.625% of base health +| 27.2 seconds
?| 23 seconds+| 10.2% of base health
 |} |}
  
  
 {|class = "wikitable" style="text-align:center;" {|class = "wikitable" style="text-align:center;"
?|+ Flooding Impacts to Cruisers and Destroyers+|+ Single-Flood Impact to Cruisers and Destroyers&nbsp;&nbsp; (0.25% HP/sec)
?! style="vertical-align:middle; width:300px" | Modifiers+! style="vertical-align:middle; width:240px" | Modifiers
 +! style="vertical-align:middle; width:150px" | Duration
 ! style="vertical-align:middle; width:175px" | Total Damage  ! style="vertical-align:middle; width:175px" | Total Damage
?! style="vertical-align:middle; width:175px" | Duration 
 |- |-
?| Total damage +| none
?| 10.0% of base health +
 | 40 seconds | 40 seconds
 +| 10.0% of base health
 |- |-
?| With one -15% modifier +| With a -15% modifier
?| 8.5% of base health +
 | 34 seconds | 34 seconds
 +| 8.5% of base health
 |- |-
 | With a -20% modifier  | With a -20% modifier
?| 8.0% of base health  
 | 32 seconds | 32 seconds
 +| 8.0% of base health
 |- |-
?| With two -15% modifiers +| With both modifiers
?| 7.0% of base health +| 27.2 seconds
?| 28 seconds+| 6.8% of base health
 +|}
 + 
 +{|class = "wikitable" style="text-align:center;"
 +|+ Single-Flood Impact to Submarines&nbsp;&nbsp; (0.33% HP/sec)
 +! style="vertical-align:middle; width:240px" | Modifiers
 +! style="vertical-align:middle; width:150px" | Duration
 +! style="vertical-align:middle; width:175px" | Total Damage
 |- |-
?| With one -15% modifier and a -20% modifier +| none
?| 6.75% of base health +| 30 seconds
?| 27 seconds+| 9.9% of base health
 |- |-
?| With two -15% modifiers and a -20% modifier +| With a -15% modifier
?| 5.75% of base health +| 25.5 seconds
?| 23 seconds+| 8.4% of base health
 +|-
 +| With a -20% modifier
 +| 24 seconds
 +| 7.9% of base health
 +|-
 +| With both modifiers
 +| 20.4 seconds
 +| 6.7% of base health
 |} |}
 </center> </center>
? 
?All damage sustained by flooding is 100% recoverable by ships that can use the {{Repair Party}} consumable. 
  
 == Notes == == Notes ==
 +=== Sources ===
 +[https://worldofwarships.com/en/news/game-updates/flooding-and-radar-changes/#flooding Updated Mechanics for Flooding] News article 12-Feb-2019.
 +=== Endnotes ===
 <references /> <references />
  
?{{#gw_breadcrumbs: Ship}}+ 
 [[Category:World of Warships]] [[Category:World of Warships]]
 [[Category:Rules pages]] [[Category:Rules pages]]

Latest revision as of 00:27, 15 November 2022

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Learn more about flooding. 16 May 2019
The "Flooding" ribbon is awarded for causing flooding to an enemy ship.
239_icon_flooding.png
Flooding in World of Warships is a damage-over-time effect that occurs due to damage taken below the waterline, most commonly from being struck by enemy torpedoes. Ships that are undergoing flooding do not list in-game as they would in real life, but do have their top speed reduced by approximately 30% in addition to the damage-over-time effect.

Causing Flooding

Only three effects have a chance to cause a ship to flood:

  • Being struck by an enemy torpedo.
  • Being rammed by an enemy ship.
  • Being hit by a depth charge as a submarine.

It is impossible to cause a flooding on an allied ship.[1] Underwater shell hits can cause damage but do not cause flooding.

A ship is immune from flooding during the action time of its Damage Control PartyWhen activated, instantly repairs fires, floods, and incapacitations, and prevents more for the duration..

A ship's torpedo protection is shown in the Port screen under the Survivability tab. If no value is shown, it is zero.

A ribbon is awarded when a flood is caused to an enemy ship. Though captains may be awarded multiple flooding ribbons, it is not possible for a ship to suffer from the effects of more than two floods concurrently: one forward and one aft. In the case of submarines, only one active flood in possible, in the amidship section.

Flooding Chance

Ramming causes flooding in the impacted section if the ram causes 10% or more damage to the ship.

The probability of a ship flooding from a torpedo strike depends on:

  • the base flooding chance of the torpedo,
  • the presence and quality of a Torpedo Protection System,
  • where the ship is struck,
  • the presence of upgrades and signals mounted on the ships,
  • the skills possessed by the attacking and defending commanders.

All ships — except destroyers and submarines — have torpedo protection for their citadel. As a result, the chance of flooding and damage are reduced even if the ship doesn't have "Torpedo Protection" displayed on the Port screen. Destroyers and submarines do not have any torpedo protection, so the torpedo damage reduction bonus of Damage Control System Modification 1: -5% to the risk of fire. / -3% to the risk of flooding when torpedoes hit the torpedo protection. will not function when the upgrade is mounted on a destroyer. (Yet another argument in favor of Engine Room Protection : -20% to the risk of incapacitation. / -20% to repair time..)

Base chance

Flood chance when striking anywhere but the ship's anti-torpedo belt.

FCB = FCT • SVL • SJWU • KLQ

Where:

  • FCB - Base flooding chance
  • FCT - Torpedo flood chance (from the tables below)
  • SVL  = 1.04 if the attacking ship flies the 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. signal flag, else 1
  • SJWU = 1.15 if the attacking ship flies the Juliet Whiskey Unaone +15% chance of causing flooding. / +5% to the risk of your ship's magazine detonating. signal flag, else 1
  • KLQ  = 1.30 if the attacking commander has the Liquidator skill, else 1


Against a Torpedo Protection System

Flood chance when striking a ship's anti-torpedo belt

FCTP = FCB • 0.33 • UDCS • (1 - (TP + KTP - KPF))

Where:

  • FCTP - Flooding chance against a ship's Torpedo Protection system
  • FCB - Base flooding chance
  • UDCS - 0.97 if the Damage Control System Modification 1: -5% to the risk of fire. / -3% to the risk of flooding when torpedoes hit the torpedo protection. upgrade is mounted and the ship is not a destroyer, else 1
  • TP - Damage reduction of the ship's Torpedo Protection system (ship specific; roughly 0-50%)
  • KTP - 0.07 if the defending commander has the Vigilance skill, else 0
  • KPF - 0.10 if the attacking commander has the Proximity Fuze skill, else 0

Ship-Launched Torpedo Data

Aerial Torpedo Data

Flooding Effects

The user interface will display this icon — overlayed with the remaining duration — when a ship is experiencing flooding.

There are two parts of the ship that can flood — the forward half and the aft half. Thus there can be two simultaneous floods (only one with submarines).

Aircraft carriers, destroyers, and cruisers take 0.25% hit points of damage per second per flood; battleships and large cruisers[1] take 0.5% hit points of damage per second per flood; Admiral Graf Spee takes 0.375% hit points of damage per second per flood; and submarines take 0.33% hit points of damage per second per flood.

In addition, ships that are flooding have their top speed reduced by 30% at full speed forward, and 60% at reverse.

Controlling and Repairing Flooding

Flooding can be stopped in one of two ways:

  • activating the Damage Control PartyWhen activated, instantly repairs fires, floods, and incapacitations, and prevents more for the duration. consumable,
  • or waiting for the flood duration timer to expire.

All damage sustained by flooding is 100% recoverable by ships that can use the Repair PartyWhile active, restores a percentage of the ship's health points each second. consumable.

Flooding Duration

Flooding has a base duration of 30 seconds for carriers and submarines and 40 seconds for the other classes.

Flooding duration cannot be extended by subsequent strikes on a part of the ship that is already flooding. Otherwise, flooding duration can be altered in several ways:

  • Activation of the Damage Control Party will stop flooding immediately.
  • Equipping Slot 4 upgrade Damage Control System Modification 2 will reduce the duration by 15%.
  • A battleship commander's Basics of Survivability skill will reduce the duration by 15%.
  • In contrast, the Super-Heavy AP Shells battleship skill will extend the duration by 30%.
  • Flying the Juliet Yankee Bissotwo -20% to flooding duration. signal will reduce the duration by 20%.

Each of these effects stacks with the others; however, they are multiplicative rather than additive.

For example, if Damage Control System Modification 2 and Juliet Yankee Bissotwo are stacked, the flooding duration is:
40 seconds x 0.85 x 0.80 = 27.2 seconds.

The below tables provides the flood durations and total health loss for the different combinations of the modifiers. Full flood duration uninterrupted by Damage Control Party is assumed.

Flooding Impact to Aircraft Carriers   (0.25% HP/sec)
Modifiers Duration Single Flood Double Flood
none 30 seconds 7.5% of base health 15% of base health
With a -15% modifier 25.5 seconds 6.38% of base health 12.75% of base health
With a -20% modifier 24 seconds 6% of base health 12% of base health
With both modifiers 20 seconds 5.1% of base health 10.2% of base health


Single-Flood Impact to Battleships   (0.5% HP/sec)
Modifiers Duration Total Damage
none 40 seconds 20.0% of base health
-15% 34 seconds 17.0% of base health
-20% 32 seconds 16.0% of base health
-15%, -15% 28.9 seconds 14.5% of base health
-15%, -20% 27.2 seconds 13.6% of base health
-15%, -15%, -20% 23.1 seconds 11.6% of base health
+30% 52 seconds 26.0% of base health
-15%, +30% 44.2 seconds 22.1% of base health
-20%, +30% 41.6 seconds 20.8% of base health
-15%, -15%, +30% 37.6 seconds 18.8% of base health
-15%, -20%, +30% 35.4 seconds 17.7% of base health
-15%, -15%, -20%, +30% 30.1 seconds 15.0% of base health


Single-Flood Impact to Large Cruisers[1]   (0.5% HP/sec)
Modifiers Duration Total Damage
none 40 seconds 20.0% of base health
With a -15% modifier 34 seconds 17.0% of base health
With a -20% modifier 32 seconds 16.0% of base health
With both modifiers 27.2 seconds 13.6% of base health


Single-Flood Impact to Admiral Graf Spee   (0.375% HP/sec)
Modifiers Duration Total Damage
none 40 seconds 15.0% of base health
With a -15% modifier 34 seconds 12.75% of base health
With a -20% modifier 32 seconds 12.0% of base health
With both modifiers 27.2 seconds 10.2% of base health


Single-Flood Impact to Cruisers and Destroyers   (0.25% HP/sec)
Modifiers Duration Total Damage
none 40 seconds 10.0% of base health
With a -15% modifier 34 seconds 8.5% of base health
With a -20% modifier 32 seconds 8.0% of base health
With both modifiers 27.2 seconds 6.8% of base health
Single-Flood Impact to Submarines   (0.33% HP/sec)
Modifiers Duration Total Damage
none 30 seconds 9.9% of base health
With a -15% modifier 25.5 seconds 8.4% of base health
With a -20% modifier 24 seconds 7.9% of base health
With both modifiers 20.4 seconds 6.7% of base health

Notes

Sources

Updated Mechanics for Flooding News article 12-Feb-2019.

Endnotes

  1. 1.0 1.1 This group includes Tier VII Toulon, Tier VIII Congress, Cherbourg, Haarlem and Schill, Tier IX Admiral Schröder, Ägir, Alaska, Alaska B, Azuma, AL Azuma, Brest, Carnot, Johan de Witt, Kronshtadt, Michelangelo and Siegfried, and Tier X Defence, Gouden Leeuw, Marseille, Puerto Rico, Sevastopol, Stalingrad, Yoshino and Yoshino B .