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User:Ninnin/Sandbox/1

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Anti-Submarine Warfare

  • Submarine are immune by air and torpedo attack.
  • They cannot be targeted by normal shellign attack
  • They can only be damaged by ASW attacks
  • They cannot be sink at night in single fleet, only a combine fleet can.
    • Friendly Fleet can sink submarine (at night)
    • wikiwiki mention that "開幕夜戦マス" can sink sub at night
  • ASW attacks is the only to have a damage modifier above 1 with some formation(Diamond, Echelon, Line-Abreast)

LBAS

  • LBAS plane with 7 or more Anti-Submarine Warfare ASW can attack submarine durinth this phase

Support

  • If a CVL is present, plane with Anti-Submarine Warfare ASW will attack submarine

OASW

  • Ever ship that can attack submarine can under some condition perform an Opening ASW attack
    • this is very important for multiple reason:
      • this add an ASW attack
      • this allow to sink Submarien before they do O-torp
      • this allow to kill the sub before other ship not equiped with ASw set-up target it

Shelling

  • Ship that can target submarine will prioritize the submarine
    • Kumano and Suzuya being the exception
Ship type Specific ship Condition Day Battle Night Battle
DE DD CL(T) CT AO? All at least 1 base Anti-Submarine Warfare ASW prioritize SS
AV CAV BBV LHA All SPB RotorCraft Flying Boat Carrier bomber with ASW prioritize SS Don't attack SS
CVL All ?? prioritize SS Nigth Air Attack cannot target SS
Suzuya Carrier Kai Ni Kumano Carrier Kai Ni prioritize surface target
Kaga Kai Ni Go prioritize SS prioritize SS with night shelling
Other ship type Cannot attack SS

Damage calculation

Anti-Submarine Warfare

[math]\displaystyle{ \text{ASW Power} = \left( 2\sqrt{\text{ASW}_\text{ship}} + 1.5\text{ASW}_\text{equip} + \bigstar + \text{Type}_\text{ship} \right) \times \text{Mod}_\text{synergy} }[/math]

  • [math]\displaystyle{ \text{Type}_\text{ship} }[/math] is a constant depending on the type of the ship performing the attack. See below for details.
Ship Type Constant
Constant Ship Types
13 Coastal Defence Ships (DE)
Destroyers (DD)
Light Cruisers (CL/CT)
Oilers (AO) (without aircraft equipped)
8 Aviation Cruisers (CAV)
Aviation Battleships (BBV)
Seaplane Tenders (AV)
Light Carriers (CVL)
Landing Ships (LHA)
Oilers (AO) (with aircraft equipped)
  • [math]\displaystyle{ \text{Mod}_\text{synergy} }[/math] is the synergy multiplier bonus from using certain combinations of ASW equips. See below for details.
ASW Damage Synergy
Small SONARSmall Small Sonars
Equipment Card Type 93 Passive Sonar.png
Type 93 Passive Sonar
Equipment Card Type 4 Passive Sonar.png
Type 4 Passive Sonar
Equipment Card Type 3 Active Sonar.png
Type 3 Active Sonar
Equipment Card Type 3 Active Sonar Kai.png
Type 3 Active Sonar Kai
Equipment Card Type124 ASDIC.png
Type124 ASDIC
Equipment Card Type144 147 ASDIC.png
Type144/147 ASDIC
Equipment Card HF DF + Type144 147 ASDIC.png
HF/DF + Type144/147 ASDIC
Large SONARLarge Large Sonars
Equipment Card Type 0 Passive Sonar.png
Type 0 Passive Sonar
Depth Charge ProjectorDCP Depth Charge Projectors (DCP)
Equipment Card Type 94 Depth Charge Projector.png
Type 94 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector.png
Type 3 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector (Concentrated Deployment).png
Type 3 Depth Charge Projector (Concentrated Deployment)
Equipment Card Prototype 15cm 9-tube ASW Rocket Launcher.png
Prototype 15cm 9-tube ASW Rocket Launcher
Equipment Card RUR-4A Weapon Alpha Kai.png
RUR-4A Weapon Alpha Kai
AP
Equipment Card Mk.32 ASW Torpedo (Mk.2 Thrower).png
Mk.32 ASW Torpedo (Mk.2 Thrower)
AP
Depth Charge RacksDCR Depth Charge (Racks) (DCR)
Equipment Card Type 95 Depth Charge.png
Type 95 Depth Charge
AP
Equipment Card Type 2 Depth Charge.png
Type 2 Depth Charge
AP
Equipment Card Lightweight ASW Torpedo (Initial Test Model).png
Lightweight ASW Torpedo (Initial Test Model)
AP
Equipment Card Hedgehog (Initial Model).png
Hedgehog (Initial Model)
AP
Equipment Card Type 2 Depth Charge Kai 2.png
Type 2 Depth Charge Kai Ni
AP
ASW MortarOther ASW Mortars
Equipment Card Type 2 12cm Mortar Kai.png
Type 2 12cm Mortar Kai
Equipment Card Type 2 12cm Mortar Kai (Concentrated Deployment).png
Type 2 12cm Mortar Kai (Concentrated Deployment)
ASW Damage Modifiers: [math]\displaystyle{ \text{Mod}_\text{synergy} = {Mod}_\text{1} \times {Mod}_\text{2} }[/math]
[math]\displaystyle{ {Mod}_\text{1} }[/math] SONAR + Depth Charges
(Any Sonar + Any Depth Charge)
1.15
[math]\displaystyle{ {Mod}_\text{2} }[/math] Depth Charge ProjectorDCP + Depth Charge RacksDCR and NO Small SONARSmall 1.1
Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.25
Examples
[math]\displaystyle{ \text{Mod}_\text{synergy} }[/math] Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.4375[math]\displaystyle{ 1.15 \times 1.25 }[/math]
Large SONARLarge + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.265[math]\displaystyle{ 1.15 \times 1.1 }[/math]
Armor Penetration
Indepentant of synergies, some equipment provides additional armor penetration to ASW attacks.

The flat armor penetration value is calculated as follows:

[math]\displaystyle{ \text{Pen} = \sum\limits_{\text{Equipment}} \Big( \sqrt{\text{ASW}_\text{Equipment} - 2} + \text{Mod}_\text{ship} \Big) }[/math]
With
  • [math]\displaystyle{ \text{ASW}_\text{Equipment} }[/math] the base ASW Anti-Submarine Warfare stat of the applicable equipment,
  • [math]\displaystyle{ \text{Mod}_\text{ship} }[/math] being 1 for DE, 0 otherwise,
Note
  • Armor penetration from equipment stacks,
  • The final armor of the targetted submarine cannot go below 1.


  • The bonuses do not stack, meaning only the highest possible bonus applies.
    • The exception is when using the special depth charge projectors detailed above.
  • Multiple equipment of the same type still only apply the bonus once.
  • There is an accuracy bonus as well but it is small. Stacking sonars will give a bigger accuracy bonus.

Notes:

  • When contributing to ASW power, Base ASW is square rooted, while equipment ASW is multiplied by 1.5
    • ASW equipment is therefore the primary source of ASW damage, with base ASW playing a very minor role.
    • However, base ASW is the primary determinant of whether a ship can reach 100 total ASW to perform opening ASW attacks.
  • Submarines cannot take more than scratch damage at night (and therefore cannot be sunk).
    • The exception to this rule is when a battle starts at night, or when in a combined fleet
  • It is possible to perform opening ASW attacks when certain conditions are achieved. For more details, please see Opening Anti-Submarine Warfare (OASW).
    • As performing an opening attack effectively doubles the damage output, reaching this OASW threshold is in general more important than tacking on additional synergy.

Synergy

ASW Damage Synergy
Small SONARSmall Small Sonars
Equipment Card Type 93 Passive Sonar.png
Type 93 Passive Sonar
Equipment Card Type 4 Passive Sonar.png
Type 4 Passive Sonar
Equipment Card Type 3 Active Sonar.png
Type 3 Active Sonar
Equipment Card Type 3 Active Sonar Kai.png
Type 3 Active Sonar Kai
Equipment Card Type124 ASDIC.png
Type124 ASDIC
Equipment Card Type144 147 ASDIC.png
Type144/147 ASDIC
Equipment Card HF DF + Type144 147 ASDIC.png
HF/DF + Type144/147 ASDIC
Large SONARLarge Large Sonars
Equipment Card Type 0 Passive Sonar.png
Type 0 Passive Sonar
Depth Charge ProjectorDCP Depth Charge Projectors (DCP)
Equipment Card Type 94 Depth Charge Projector.png
Type 94 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector.png
Type 3 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector (Concentrated Deployment).png
Type 3 Depth Charge Projector (Concentrated Deployment)
Equipment Card Prototype 15cm 9-tube ASW Rocket Launcher.png
Prototype 15cm 9-tube ASW Rocket Launcher
Equipment Card RUR-4A Weapon Alpha Kai.png
RUR-4A Weapon Alpha Kai
AP
Equipment Card Mk.32 ASW Torpedo (Mk.2 Thrower).png
Mk.32 ASW Torpedo (Mk.2 Thrower)
AP
Depth Charge RacksDCR Depth Charge (Racks) (DCR)
Equipment Card Type 95 Depth Charge.png
Type 95 Depth Charge
AP
Equipment Card Type 2 Depth Charge.png
Type 2 Depth Charge
AP
Equipment Card Lightweight ASW Torpedo (Initial Test Model).png
Lightweight ASW Torpedo (Initial Test Model)
AP
Equipment Card Hedgehog (Initial Model).png
Hedgehog (Initial Model)
AP
Equipment Card Type 2 Depth Charge Kai 2.png
Type 2 Depth Charge Kai Ni
AP
ASW MortarOther ASW Mortars
Equipment Card Type 2 12cm Mortar Kai.png
Type 2 12cm Mortar Kai
Equipment Card Type 2 12cm Mortar Kai (Concentrated Deployment).png
Type 2 12cm Mortar Kai (Concentrated Deployment)
ASW Damage Modifiers: [math]\displaystyle{ \text{Mod}_\text{synergy} = {Mod}_\text{1} \times {Mod}_\text{2} }[/math]
[math]\displaystyle{ {Mod}_\text{1} }[/math] SONAR + Depth Charges
(Any Sonar + Any Depth Charge)
1.15
[math]\displaystyle{ {Mod}_\text{2} }[/math] Depth Charge ProjectorDCP + Depth Charge RacksDCR and NO Small SONARSmall 1.1
Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.25
Examples
[math]\displaystyle{ \text{Mod}_\text{synergy} }[/math] Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.4375[math]\displaystyle{ 1.15 \times 1.25 }[/math]
Large SONARLarge + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.265[math]\displaystyle{ 1.15 \times 1.1 }[/math]
Armor Penetration
Indepentant of synergies, some equipment provides additional armor penetration to ASW attacks.

The flat armor penetration value is calculated as follows:

[math]\displaystyle{ \text{Pen} = \sum\limits_{\text{Equipment}} \Big( \sqrt{\text{ASW}_\text{Equipment} - 2} + \text{Mod}_\text{ship} \Big) }[/math]
With
  • [math]\displaystyle{ \text{ASW}_\text{Equipment} }[/math] the base ASW Anti-Submarine Warfare stat of the applicable equipment,
  • [math]\displaystyle{ \text{Mod}_\text{ship} }[/math] being 1 for DE, 0 otherwise,
Note
  • Armor penetration from equipment stacks,
  • The final armor of the targetted submarine cannot go below 1.

LBAS

See LBAS page

OASW

See OASW