RUR-4A Weapon Alpha Kai

[Edit] RUR-4A Weapon Alpha Kai No.377 RUR-4A Weapon Alpha改
Depth Charge Effects: +1 +17 +1 +1 Scrap value: 1 10 4 4 (Unbuildable)
Refittable Ship Types
Fast Battleship	Battleship
Aviation Battleship	Standard Aircraft Carrier
Armored Carrier	Light Carrier
Heavy Cruiser	Aviation Cruiser
Light Cruiser	Torpedo Cruiser
Training Cruiser	Destroyer
Coastal Defense Ship	Submarine
Aircraft Carrying Submarine	Seaplane Tender
Fleet Oiler	Submarine Tender
Repair Ship	Amphibious 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.

Mechanics

Depth Charges are one of the main equipment used for ASW, greatly enhancing ASW Damage Synergy. Their main stat is "ASW" .

ASW Damage Synergy
Small Small Sonars	Type 93 Passive Sonar Type 4 Passive Sonar Type 3 Active Sonar Type 3 Active Sonar Kai Type124 ASDIC Type144/147 ASDIC HF/DF + Type144/147 ASDIC
Large Large Sonars	Type 0 Passive Sonar
DCP Depth Charge Projectors (DCP)	Type 94 Depth Charge Projector Type 3 Depth Charge Projector Type 3 Depth Charge Projector (Concentrated Deployment) Prototype 15cm 9-tube ASW Rocket Launcher RUR-4A Weapon Alpha Kai AP Mk.32 ASW Torpedo (Mk.2 Thrower) AP
DCR Depth Charge (Racks) (DCR)	Type 95 Depth Charge AP Type 2 Depth Charge AP Lightweight ASW Torpedo (Initial Test Model) AP Hedgehog (Initial Model) AP Type 2 Depth Charge Kai Ni AP
Other ASW Mortars	Type 2 12cm Mortar Kai 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]	+ (Any Sonar + Any Depth Charge)	1.15
[math]\displaystyle{ {Mod}_\text{2} }[/math]	DCP + DCR and NO Small	1.1
	Small + DCP + DCR	1.25
Examples
[math]\displaystyle{ \text{Mod}_\text{synergy} }[/math]	Small + DCP + DCR	1.4375[math]\displaystyle{ 1.15 \times 1.25 }[/math]
	Large + DCP + DCR	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 affected equipment are: DCR: Type 95 DC, Type 2 DC, Lightweight ASW Torpedo, Hedgehog, Type 2 DC K2 DCP: RUR-4A Weapon Alpha Kai, Mk.32 ASW Torpedo (Mk.2 Thrower). 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 stat of the applicable equipment, Visible Bonuses and Improvements are not counted here. [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.

Notes

How To Obtain

From quest: B149

Ranking reward for:

• Oct 2024: 1-5 (★+2), 6-20 (★+1), 21-100

Updates History

• 2020-05-20: Implemented

Fit Bonuses

RUR-4A Weapon Alpha Kai Equipment Bonuses
Ship	Extra Requirement									Note
Fletcher Mk.II	(1st equipped)				+3				+3	One-time
Other United States Navy Vessels	(1st equipped)				+2				+1	One-time
Dan Yang / Yukikaze Kai Ni	(1st equipped)				+1				+2	One-time
Town-class J-class Perth-class	(1st equipped)				+1				+1	One-time

See Also

• RUR-4 Weapon Alpha