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Flooding

Flooding

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Revision as of 14:05, 13 August 2018
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Revision as of 02:53, 21 August 2018
Flood formula corrected.
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 Only two effects have a chance to cause a ship to flood: Only two effects have a chance to cause a ship to flood:
  
?* Being struck by a [[Torpedoes (WoWS)|torpedo]] (enemy or friendly).+* Being struck by a enemy [[Torpedoes (WoWS)|torpedo]].
 * Being [[ship:Ramming|rammed]] by an enemy ship. * Being [[ship:Ramming|rammed]] by an enemy ship.
  
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 ==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%. Many ships — most battleships and aircraft carriers, as well as some heavy cruisers — have torpedo bulges built into their citadel armor that reduces not only damage taken from the torpedo, but the chance that the torpedo will cause flooding. This is displayed in the port UI as "Torpedo Protection" under the Survivability tab.+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 the ships except Destroyers have torpedo protection for their citadel. Thanks to this, The chance of flooding and damage are reduced even if the ships don't have "Torpedo Protection" in the port UI. The value in the port is calculated by multiplying flood coefficient by 3.
 +Because destroyers' citadel receive 33% of listed damage from a penetration by default, they ignore the torpedo protection not to reduce torpedo damage too much.
  
 In order to calculate the flood chance of a given torpedo versus a given ship, the following formula is utilized: In order to calculate the flood chance of a given torpedo versus a given ship, the following formula is utilized:
  
?{{AnnoWiki|content='''<nowiki>{</nowiki> [ ( 1 - [Torpedo Protection] - [Damage Control Modification 1] ) x 0.33 <nowiki>}</nowiki> x ( [Torpedo Flood Chance] + [Signals] ) = Flood Chance'''}}+{{AnnoWiki|content=''' ( [Torpedo Protection Coefficient] x [Damage Control Modification 1] ) x ( [Torpedo Flood Chance] + [Signals] ) = Flood Chance'''}}
  
 * The value of "Torpedo Protection" varies by ship and is displayed in the port screen.  * The value of "Torpedo Protection" varies by ship and is displayed in the port screen.
?* The value of "Damage Control Modification 1" is 0.03 if the appropriate [[Ship:Upgrades#Tier_III.2B_Equipment_.28Slot_4.29|upgrade]] is installed; otherwise, it is zero.+* The value of "Damage Control Modification 1" is 0.97 if the appropriate [[Ship:Upgrades#Tier_III.2B_Equipment_.28Slot_4.29|upgrade]] is installed; otherwise, it is 1.
?* "Torpedo Flood Chance" varies by torpedo; the values can be found in the tables below.+* "Torpedo Flood Chance" and "Flood Protection Coefficient"; the values can be found in the tables below.
 * "Signals" varies depending on which signals are equipped; both Victor Lima ({{Victor Lima|Size=18px}}) and Juliet Whiskey Unaone ({{Juliet Whiskey Unaone|Size=18px}}) can increase the flooding chance of torpedoes. * "Signals" varies depending on which signals are equipped; both Victor Lima ({{Victor Lima|Size=18px}}) and Juliet Whiskey Unaone ({{Juliet Whiskey Unaone|Size=18px}}) can increase the flooding chance of torpedoes.
  
 It is noteworthy that this formula is dependent upon the torpedo striking the torpedo protection (torpedo bulges) on the ship in question. If the torpedo strikes farther forward or astern of this protection, the damage and flood chance reduction afforded by the torpedo protection will not apply. It is noteworthy that this formula is dependent upon the torpedo striking the torpedo protection (torpedo bulges) on the ship in question. If the torpedo strikes farther forward or astern of this protection, the damage and flood chance reduction afforded by the torpedo protection will not apply.
 +
 +<div class="b-popup"><div class="b-popup_head js-tech-nav_head"><div><h3>Flood Protection Coefficient</h3></div><span class="b-tech-nav_arrow"></span></div><div class="b-popup_content" style="display:none;"><div>
 +{{Ship:Flood_Coefficient}}
 +</div></div></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: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:none;"><div>

Revision as of 02:53, 21 August 2018

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 20% in addition to the damage-over-time effect.

Causing Flooding

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

A ship's torpedo protection is shown in the Port screen under the Survivability tab. If no value is shown, it is considered to be 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 multiple floods; either a ship is flooding or it is not. This is distinctly different from fires, where a ship can suffer from multiple simultaneous fires that stack their damage-over-time effects together.

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 upgrades on the damaged ship (specifically, Damage Control System Modification 1), and the signals mounted on the attacking ship: Juliet Whiskey Unaone (+15% chance of causing flooding. / +5% to the risk of your ship's magazine detonating.) increases the chance of causing a flood by 15%; 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.) increases it by 4%. All the ships except Destroyers have torpedo protection for their citadel. Thanks to this, The chance of flooding and damage are reduced even if the ships don't have "Torpedo Protection" in the port UI. The value in the port is calculated by multiplying flood coefficient by 3. Because destroyers' citadel receive 33% of listed damage from a penetration by default, they ignore the torpedo protection not to reduce torpedo damage too much.

In order to calculate the flood chance of a given torpedo versus a given ship, the following formula is utilized:

( [Torpedo Protection Coefficient] x [Damage Control Modification 1] ) x ( [Torpedo Flood Chance] + [Signals] ) = Flood Chance
  • The value of "Torpedo Protection" varies by ship and is displayed in the port screen.
  • The value of "Damage Control Modification 1" is 0.97 if the appropriate upgrade is installed; otherwise, it is 1.
  • "Torpedo Flood Chance" and "Flood Protection Coefficient"; the values can be found in the tables below.
  • "Signals" varies depending on which signals are equipped; both 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 Juliet Whiskey Unaone (+15% chance of causing flooding. / +5% to the risk of your ship's magazine detonating.) can increase the flooding chance of torpedoes.

It is noteworthy that this formula is dependent upon the torpedo striking the torpedo protection (torpedo bulges) on the ship in question. If the torpedo strikes farther forward or astern of this protection, the damage and flood chance reduction afforded by the torpedo protection will not apply.

Flood Protection Coefficient

Ship-Launched Torpedo Data

Aerial Torpedo Data

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 (+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 Juliet Whiskey Unaone (+15% chance of causing flooding. / +5% to the risk of your ship's magazine detonating.) signals. The flood chance would be:


{ [ (1.00) - (0.55) - (0.03) ] x 0.33 } x [ (4.06) + (0.15) + (0.04) ] = 58.91% flood chance


If the Shimakaze was to de-mount the signal flags, the flood chance would be:


{ [ (1.00) - (0.55) - (0.03) ] x 0.33 } x [ 4.06 ] = 56.27% flood chance


If the same Shimakaze was to attack a Montana that did not have Damage Control Modification 1 installed, the flood chance would be:


{ [ (1.00) - (0.37) ] x 0.33 } x [ 4.06 ] = 84.41% flood chance

Flooding Effects

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

Flooding damage reduces a ship's health by 0.667% of its total health pool per second. If a flood is not controlled (see below) and is allowed to run for its full duration, a ship will lose just over 60% of its total health pool to a single flood.

In addition, ships that are flooding have their top speed reduced by 15-20% (depending on class).

Controlling Flooding

The effects of flooding can only be removed by utilization of the Damage Control Party When activated, instantly repairs fires, floods, and incapacitations, and prevents more for the duration. consumable, or by waiting for the flood duration timer to expire. Flooding has a base duration of 90 seconds, which can be reduced several ways:

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

For example, if all three effects are stacked, the flooding duration is: 90 seconds x 0.85 x 0.85 x 0.80 = 52.02 seconds.

The below table provides the flood durations and total health loss for the different combinations of the above three effects.

Modifiers Total Damage Duration
Total damage 60% of base health 90 seconds
With one -15% modifier 51% of base health 77 seconds
With a -20% modifier 48% of base health 72 seconds
With two -15% modifiers 43.4% of base health 65 seconds
With one -15% modifier and a -20% modifier 40.8% of base health 61 seconds
With two -15% modifiers and a -20% modifier 34.7% of base health 52 seconds

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

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