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RUR-4A Weapon Alpha Kai

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RUR-4A Weapon Alpha Kai

No.377 RUR-4A Weapon Alpha改

Depth Charges Depth Charge

Effects: Armor+1 Evasion+1 Accuracy+1 Anti-Submarine+17

Scrap Value: Fuel1 Ammunition10 Steel4 Bauxite4

Equipment Card RUR-4A Weapon Alpha Kai.png

Equipment Character RUR-4A Weapon Alpha Kai.png

Equipment Item RUR-4A Weapon Alpha Kai.png

Equipment Full RUR-4A Weapon Alpha Kai.png

Development
CraftableImprovable
Refittable Class
Coastal Defense ShipDestroyer
Light CruiserTorpedo Cruiser
Heavy CruiserAviation Cruiser
BattleshipAviation Battleship
Fast BattleshipLight Carrier
Standard CarrierArmored Carrier
Seaplane TenderSubmarine Tender
SubmarineSubmarine Carrier
Repair ShipTraining Cruiser
Fleet OilerAmphibious Assault Ship

Introduction

増大する潜水艦の脅威に対抗するため開発された、革新的な次世代の対潜前投ロケット弾兵装です。
実機は不具合の多発により運用上の問題を抱えていましたが、本兵装は改良によって不発率の低下に成功したif改修兵装です。
本兵装のコンセプトは、あの名対潜兵装アスロックへと受け継がれていきます。

This is a revolutionary next-generation forward-firing anti-submarine rocket weapon developed to counter the increasing threat of submarines.
The base version was plagued with problems during actual use, but this is a what-if version where improvements succeeded in reducing the rate of misfires.
The main concept behind this weapon was succeeded by the famed ASROC ASW weapons system.

Notes

ASW Damage Synergy
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
SONARLarge Large Sonars
Equipment Card Type 0 Passive Sonar.png
Type 0 Passive Sonar
Depth ChargesDCP 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 ChargesDCR 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
Depth ChargesOther 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
SONAR + Depth Charges 1.15x
Depth ChargesDCP + Depth ChargesDCR 1.1x
SONARLarge + Depth ChargesDCP + Depth ChargesDCR 1.265xSONARLarge + Depth Charges = 1.15x
Depth ChargesDCP + Depth ChargesDCR = 1.1x

1.15 * 1.1(1 + 0.1) = 1.265x
SONARSmall + Depth ChargesDCP + Depth ChargesDCR 1.4375xSONARSmall + Depth ChargesDCP / Depth ChargesOther = 1.15x
SONARSmall + Depth ChargesDCR = 1.15x
Depth ChargesDCP + Depth ChargesDCR = 1.1x

1.15 * 1.25(1 + 0.1 + 0.15) = 1.4375
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,
  • Armor penetration from equipment stacks,
  • The final armor of the targetted submarine cannot go below 1.

How To Obtain

From quests: B149


Updates History

  • 2020-05-20: Implemented

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Fletcher Mk.IIFletcher Mk.II +3 +3
US ShipsAtlanta
Fletcher
Johnston
Samuel B. Roberts
+2 +1
British ShipsJervis
Janus

Australian ShipsPerth
+1 +1
Dan YangDan Yang/Yukikaze Kai NiYukikaze Kai Ni +1 +2

See Also