進水（戰艦世界）
Causing Flooding
Only two effects have a chance to cause a ship to flood:
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 (
) increases the chance of causing a flood by 15%; Victor Lima (
) 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.
In order to calculate the flood chance of a given torpedo versus a given ship, the following formula is utilized:
- 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 upgrade is installed; otherwise, it is zero.
- "Torpedo Flood Chance" varies by torpedo; the values can be found in the tables below.
- "Signals" varies depending on which signals are equipped; both Victor Lima () and Juliet Whiskey Unaone () 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.
Ship-Launched Torpedo Statistics
Aerial Torpedo Statistics
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 () and Juliet Whiskey Unaone () 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
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 傷害控制小組 (
) 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:
- Equipping Damage Control Modification 2 will reduce the duration by 15%.
- Using a commander with the Level 3 commander skill Basics of Survivability will reduce the duration by 15%.
- Flying the Juliet Yankee Bissotwo signal (
) will reduce the duration by 20%.
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 維修小組 (
) consumable.
