Type 3 Depth Charge Projector

[Edit] Type 3 Depth Charge Projector No.45 三式爆雷投射機
Depth Charge Effects: +8 Scrap value: 3 1 1 (Buildable)
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

対潜兵装です。
九四式にかわる新型の爆雷投射機です。
新鋭の海防艦などに装備されました。
大量装備すれば、発見さえできれば、敵潜水艦の面制圧も…きっと可能です。

An anti-submarine weapon.
A new type of depth-charge intended to replace the Type-94.
It was deployed on the latest ships.
With a bunch of these equipped, as long as you can find the enemy, you'll be sure to wipe them out.

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

Buildable

Stock equipment of: Akebono Kai Ni, Arashi Kai, Isuzu Kai Ni, Kaiboukan No.30, Kaiboukan No.4, Kazagumo Kai Ni (★+5), Kuroshio Kai Ni (★+5), Tanikaze D Kai, Tatsuta Kai Ni

Upgradeable from: Type 94 Depth Charge Projector (★+3)

From quest: By6 (★+2, choice), C25 (choice), C42 (choice)

From limited-time quest: 21Su LB2 (choice), 21Su LB3 (x3, choice), 2103LQ1 (x3, choice), 2103LQ2 (choice), 2103B2 (x2, choice), 2204 B1 (x3, choice), 2212 C1 (x4, choice)

Ranking reward for:

• Jul 2013: 海上護衛総隊
• Aug 2013: 海上護衛総隊
• Sep 2013: 海上護衛総隊
• Oct 2013: 海上護衛総隊
• Nov 2013: 海上護衛総隊

Event reward for:

• Fall 2021 Event E-1: Casual (★+4)

Uses

Used to improve: Type 3 Depth Charge Projector, S-51J Kai, Type 3 Depth Charge Projector (Concentrated Deployment)

Updates History

• 2013-05-08: Implemented as buildable item
• 2013-06-12: Stats increased: +? → +6
• 2013-11-01: Stats increased: +6 → +8
• 2014-02-26: ASW synergy added
• 2018-06-13: Became improvable

Fit Bonuses

Type 3 Depth Charge Projector Equipment Bonuses
Ship	Extra Requirement									Note
Katori-class	-				+3				+2

Improvement

Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	Type 3 Depth Charge Projector	0	10	80	20	30	3/3	2/3	-	D	X	H	I K	H   I K	D   K	D   K	Hiburi Daitou Isuzu Kai Ni Kuroshio Kai Ni
		6					3/5	2/4	1x
		10					-	-	-

Improvement effects
	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