Type 0 Passive Sonar

[Edit] Type 0 Passive Sonar No.132 零式水中聴音機
Large Sonar Effects: +11 +1 +1 +1 Scrap value: 3 3 (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

大型艦用パッシブソナー兵装です。
九三式水中聴音機の捕音機を増強した大型グレードアップバージョンで、大和型戦艦のバルバス・バウ付近にも装備されました。
専門の人員も配置して水面下の音を収集、敵潜などの早期発見に努めます。

A Passive SONAR system for large ships. An upgrade from the Type 93 Passive SONAR, with a larger sound collector, it was equipped on Yamato-class ships within their bulbous bow.
The IJN had specialized personnel constantly listening on the machine, trying to quickly recognize any enemy submarines.

Notes

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.

How To Obtain

From quests: B124 (choice)

Ranking reward for:

• Feb 2015: 1-5 (x2), 6-20, 21-100, 101-500
• Jun 2015: 1-5, 6-20, 21-100, 101-500
• Sep 2015: 1-5
• Oct 2015: 1-5, 6-20, 21-100

Updates History

• 2015-03-18: Implemented as ranking reward
• 2022-08-04: Became improvable

Fit Bonuses

Type 0 Passive Sonar Equipment Bonuses
Ship	Extra Requirement									Note
Shoukaku Kai Ni /A Zuikaku Kai Ni /A Taihou Kai	(1st equipped) (★0-2)								+2	One-time
	(1st equipped) (★3-4)								+3	One-time
	(1st equipped) (★5-6)				+1				+3	One-time
	(1st equipped) (★7)				+1				+4	One-time
	(1st equipped) (★8)				+2				+4	One-time
	(1st equipped) (★9)				+2			+1	+4	One-time
	(1st equipped) (★MAX)				+3			+1	+4	One-time
Yamato Kai Ni /Juu Musashi Kai Ni	(1st equipped) (★0-2)								+1	One-time
	(1st equipped) (★3-4)								+2	One-time
	(1st equipped) (★5-6)				+1				+2	One-time
	(1st equipped) (★7)				+1				+3	One-time
	(1st equipped) (★8)				+2				+3	One-time
	(1st equipped) (★9)				+2			+1	+3	One-time
	(1st equipped) (★MAX)				+3			+1	+3	One-time
All Other Ships	(1st equipped) (★3-4)								+1	One-time
	(1st equipped) (★5-6)				+1				+1	One-time
	(1st equipped) (★7)				+1				+2	One-time
	(1st equipped) (★8)				+2				+2	One-time
	(1st equipped) (★9)				+2			+1	+2	One-time
	(1st equipped) (★MAX)				+3			+1	+2	One-time

Akashi's Improvement Arsenal

Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	Type 0 Passive Sonar	0	10	0	50	110	5/7	4/5	1x	X	X	X	H	H	H	X	Hiei
		6					6/9	4/6	1x
		10					-	-	-