Type 3 Active Sonar Kai

[Edit] Type 3 Active Sonar Kai No.438 三式水中探信儀改
Small Sonar Effects: +1 +11 +2 +1 Scrap value: 2 4 (Unbuildable)
Refittable Class
Coastal Defense Ship	Destroyer
Light Cruiser	Torpedo Cruiser
Heavy Cruiser	Training Cruiser
Aviation Cruiser	Fast Battleship
Battleship	Aviation Battleship
Light Carrier	Standard Aircraft Carrier
Armored Carrier	Seaplane Tender
Submarine	Aircraft Carrying Submarine
Submarine Tender	Fleet Oiler
Repair Ship	Amphibious Assault Ship

Introduction

改修型の対潜兵装です。
日本海軍装備の主力アクティブソナーを改良調整、対潜戦闘の戦訓を取り入れて改修した三式水中探信儀の改良型です。
日本海軍の駆逐艦を中心として、いくつかの艦でより高い運用性を発揮します。

This is an improved piece of anti-submarine equipment.
It is an upgraded version of the main active sonar used by the Imperial Japanese Navy.
The Type 3 Active Sonar has been improved by incorporating lessons learned in combat.
It has increased performance on several ships, particularly on destroyers of the Imperial Japanese Navy.

Mechanics

Sonars are the main equipment used for ASW, being required to trigger most OASW, and 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, Armor penetration from equipment stacks, The final armor of the targetted submarine cannot go below 1.

Notes

How To Obtain

From quest: B172, F103

From limited-time quest: 2304 B2 (★+1, choice)

Ranking reward for:

• Nov 2022: 1-5 (★+9), 6-20 (★+7), 21-100 (★+5)

Updates History

• 2021-09-28: Implemented

Fit Bonuses

Ship	Extra Requirement								Note
Shigure Kai Ni Kamikaze Kai Harukaze Kai Asashimo Kai Ni Yamakaze Kai Ni (D)	(★4-5)				+1				One-time, additional to below
	(★6-7)				+1			+1
	(★8-9)				+2			+1
	(★MAX)				+2			+2
Shigure Asashimo Kamikaze Harukaze Yamakaze Maikaze		+1			+3			+2	Stackable, additional to below
Ushio Ikazuchi Yamagumo Isokaze Hamakaze Kishinami					+2			+2	Stackable, additional to below
Shigure Yamakaze Kamikaze Harukaze					+2			+2	One-time
Ushio Ikazuchi Suzukaze Maikaze Isokaze Hamakaze Yamagumo Umikaze Kawakaze					+2			+1	One-time
Other IJN Destroyers Isuzu Kai Ni Naka Kai Ni Yura Kai Ni Ishigaki Mikura					+1			+1	One-time
Katori-class					+2			+3	One-time between itself, Type 93 Passive Sonar, Type 3 Active Sonar, or Type 4 Passive Sonar

Improvement

Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	Type 3 Active Sonar Kai	0	20	0	70	60	6/8	4/5	1x	Y	Y S	Y S	Y S	Y S	Y	Y	Yamakaze Kai Ni Shigure Kai Ni
		6					8/12	6/7	2x
		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
ASW	1.30	1.83	2.25	2.60	2.90	3.18	3.43	3.67	3.90	4.11
Torpedo	1.50	2.12	2.59	3.00	3.35	3.67	3.96	4.24	4.50	4.74