Flooding
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. Being rammed by an enemy ship can also cause flooding. 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.
Flooding damage reduces a ship's health by 0.67-0.43% of its total health pool per second, depending on the ship's tier. The exact percentages are given in the table below.
| Ship Tier | Health lost per second |
|---|---|
| Tier I | 0.667% of total |
| Tier II | |
| Tier III | |
| Tier IV | 0.583% of total |
| Tier V | 0.558% of total |
| Tier VI | 0.533% of total |
| Tier VII | 0.508% of total |
| Tier VIII | 0.483% of total |
| Tier IX | 0.458% of total |
| Tier X | 0.433% of total |
Some 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. The probability of a ship flooding depends on where it is struck by the torpedo, the presence of upgrades on the damaged ship (specifically, Damage Control System Modification 1), and the Signals mounted on the attacking ship (Victor Lima and Juliet Whiskey Unaone increase the chance of causing flooding).
Though players may be awarded multiple flooding ribbons, unlike fire, it is not possible for a ship to suffer from the effects of multiple floods; either a ship is flooding or it is not.
Flooding can only be repaired by utilization of the Damage Control Party consumable, or by waiting for the flood duration timer to expire. Flooding has a base duration of 120 seconds, which can be reduced several ways:
- Equipping Damage Control Modification 2 will reduce the duration by 15%.
- Flying the Juliet Yankee Bissotwo signal will reduce the duration by 20%.
- Using a commander with the Tier 1 commander skill Basics of Survivability will reduce the duration by 15%.
Each of these effects is cumulative and stacks with the others; however, they are multiplicative individually. For example, if all three effects are stacked, the flooding duration is: 120 seconds * 0.85 * 0.85 * 0.80 = 69.36 seconds.
All damage sustained by flooding is 100% recoverable by ships that can use the Repair Party consumable.
