Prototype 15cm 9-tube ASW Rocket Launcher

[Edit] Prototype 15cm 9-tube ASW Rocket Launcher No.288Thí chế 15cm9 liên trang đối tiềm phún tiến pháo
Depth Charge Effects:+15+1 Scrap value:932(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

Bạo lôi đầu hạ quỹ điều は hạm の hậu phương, 従 lai hình の tam thức bạo lôi đầu xạ cơ は hạm の huyền trắc phương hướng に bạo lôi を đầu xạ khả năng でしたが, hạm thủ phương hướng にも bạo lôi を đầu xạ khả năng な tân đối tiềm trang bị が bổn phún tiến bạo lôi pháo です.
まだ, thí tác đoạn giai で âu mễ の đồng chủng binh trang に bỉ べて phát triển đồ thượng ではありますが, hòa chế ヘッジホッグに phát triển する khả năng tính もあった binh trang です.

Depth charge launchers on ships' sterns and existing Type 3 depth charge projectors could throw depth charges to the sides of a ship, but this rocket launcher could throw depth charges ahead of the ship's bow as well.
This system was still a mere prototype in comparison to Western developments of similar weaponry, but it had the potential to become something akin to a Japanese-made Hedgehog.

Mechanics

Depth Chargesare one of the main equipment used forASW,greatly enhancingASW Damage Synergy.Their main stat is "ASW".

ASWDamage Synergy
SmallSmall 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
LargeLarge Sonars	Type 0 Passive Sonar
DCPDepth 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
DCRDepth 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
OtherASW 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+DCRand NOSmall	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 additionalarmor penetrationto 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 ASWstat of the applicable equipment, Visible BonusesandImprovementsare not counted here. [math]\displaystyle{ \text{Mod}_\text{ship} }[/math]being1forDE,0otherwise, Note Armor penetration from equipment stacks, The final armor of the targetted submarine cannot go below1.

Notes

How To Obtain

From limited-time quest:Su09,2401 B3(x2, choice)

Ranking reward for:

• Nov 2021: 1-5 (★+5), 6-20 (★+4), 21-100 (★+3), 101-500 (★+2)

Event reward for:

• Summer 2020 EventE-1: Hard
• Fall 2021 EventE-2: Hard (★+2)
• Summer 2023 EventE-1: Hard (★+2, choice), Medium (choice)

Updates History

• 2018-05-15:Implemented
• 2020-01-14:Visible bonuses added

Fit Bonuses

Prototype 15cm 9-tube ASW Rocket LauncherEquipment Bonuses
Ship	Extra Requirement									Note
Yuubari Kai Ni D	-	+1			+3				+2
Noshiro Kai Ni Shigure Kai San	-				+4				+1
Katori-class	-				+3				+2
Isuzu Kai Ni Yura Kai Ni Naka Kai Ni Yukikaze Kai Ni	-				+2				+1

Improvement

Improvementeffects
	1★	2★	3★	4★	5★	6★	7★	8★	9★	Max★
	0.75	1.06	1.29	1.50	1.67	1.83	1.98	2.12	2.25	2.37
	0.67	0.94	1.15	1.33	1.49	1.63	1.76	1.89	2.00	2.11

See Also

• Depth charge