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Difference between revisions of "Type 4 Passive Sonar"

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==Introduction==
 
小型艦艇にも装備可能な、新型パッシブソナー兵装です。<br>九三式水中聴音機に比べて、その対潜発見能力は格段に向上しました。<br>数は少ないですが、大戦末期に建造された後期型の駆逐艦などの対潜兵装として装備されました。
 
 
 
''This SONAR can be equipped on smaller ships, and is a new type of armament: the "passive SONAR."<br>Compared to the type 93 SONARs, this has increased ASW.<br>There are few of these because it was made in the later part of the war, and were equipped by some of the newer destroyers.
 
  
 
==Mechanics==
 
==Mechanics==
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* '''2020-01-14:''' Visible bonuses added
 
* '''2020-01-14:''' Visible bonuses added
 
* '''2021-03-01:''' Visible bonuses added for {{Ship/Link|Katori|Kashima|text=''Katori''-class}}
 
* '''2021-03-01:''' Visible bonuses added for {{Ship/Link|Katori|Kashima|text=''Katori''-class}}
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==Fit Bonuses==
 
==Fit Bonuses==
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==See Also==
 
==See Also==
 
{{Equipmentlist}}
 
{{Equipmentlist}}
{{EquipmentCategoriesKai|{{{1|{{PAGENAME}}}}}}}
 

Latest revision as of 09:47, 10 May 2024

No.149 四式水中聴音機
Sonar.png Small Sonar
Effects: Armor+1 ASW+12 Accuracy+1
Scrap value: Steel 1 Bauxite 3 (Unbuildable)

Equipment Card Type 4 Passive Sonar.png

Equipment Character Type 4 Passive Sonar.png

Equipment Item Type 4 Passive Sonar.png

Equipment Full Type 4 Passive Sonar.png

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

小型艦艇にも装備可能な、新型パッシブソナー兵装です。
九三式水中聴音機に比べて、その対潜発見能力は格段に向上しました。
数は少ないですが、大戦末期に建造された後期型の駆逐艦などの対潜兵装として装備されました。

This SONAR can be equipped on smaller ships, and is a new type of armament: a passive SONAR.
Compared to the type 93 SONARs, this has increased ASW.
There are few of these because it was made in the later part of the war, and were equipped by some of the newer destroyers.

Mechanics

SONAR 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" Anti-Submarine Warfare.

ASW Damage Synergy
Small SONARSmall Small Sonars
Equipment Card Type 93 Passive Sonar.png
Type 93 Passive Sonar
Equipment Card Type 4 Passive Sonar.png
Type 4 Passive Sonar
Equipment Card Type 3 Active Sonar.png
Type 3 Active Sonar
Equipment Card Type 3 Active Sonar Kai.png
Type 3 Active Sonar Kai
Equipment Card Type124 ASDIC.png
Type124 ASDIC
Equipment Card Type144 147 ASDIC.png
Type144/147 ASDIC
Equipment Card HF DF + Type144 147 ASDIC.png
HF/DF + Type144/147 ASDIC
Large SONARLarge Large Sonars
Equipment Card Type 0 Passive Sonar.png
Type 0 Passive Sonar
Depth Charge ProjectorDCP Depth Charge Projectors (DCP)
Equipment Card Type 94 Depth Charge Projector.png
Type 94 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector.png
Type 3 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector (Concentrated Deployment).png
Type 3 Depth Charge Projector (Concentrated Deployment)
Equipment Card Prototype 15cm 9-tube ASW Rocket Launcher.png
Prototype 15cm 9-tube ASW Rocket Launcher
Equipment Card RUR-4A Weapon Alpha Kai.png
RUR-4A Weapon Alpha Kai
AP
Equipment Card Mk.32 ASW Torpedo (Mk.2 Thrower).png
Mk.32 ASW Torpedo (Mk.2 Thrower)
AP
Depth Charge RacksDCR Depth Charge (Racks) (DCR)
Equipment Card Type 95 Depth Charge.png
Type 95 Depth Charge
AP
Equipment Card Type 2 Depth Charge.png
Type 2 Depth Charge
AP
Equipment Card Lightweight ASW Torpedo (Initial Test Model).png
Lightweight ASW Torpedo (Initial Test Model)
AP
Equipment Card Hedgehog (Initial Model).png
Hedgehog (Initial Model)
AP
Equipment Card Type 2 Depth Charge Kai 2.png
Type 2 Depth Charge Kai Ni
AP
ASW MortarOther ASW Mortars
Equipment Card Type 2 12cm Mortar Kai.png
Type 2 12cm Mortar Kai
Equipment Card Type 2 12cm Mortar Kai (Concentrated Deployment).png
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] SONAR + Depth Charges
(Any Sonar + Any Depth Charge)
1.15
[math]\displaystyle{ {Mod}_\text{2} }[/math] Depth Charge ProjectorDCP + Depth Charge RacksDCR and NO Small SONARSmall 1.1
Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.25
Examples
[math]\displaystyle{ \text{Mod}_\text{synergy} }[/math] Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.4375[math]\displaystyle{ 1.15 \times 1.25 }[/math]
Large SONARLarge + Depth Charge ProjectorDCP + Depth Charge RacksDCR 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 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 Anti-Submarine Warfare stat of the applicable equipment,
  • [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

Upgradeable from: Type 93 Passive SonarType 93 Passive Sonar

From quest: B74

From limited-time quest: SB05

Ranking reward for:

  • Aug 2015: 1-5 (x2), 6-20 (x2), 21-100 (x2), 101-500
  • Apr 2016: 1-5, 6-20, 21-100, 101-500
  • Dec 2016: 1-5, 6-20, 21-100, 101-500

Event reward for:

Uses

Used to improve: Type 4 Passive SonarType 4 Passive Sonar

Updates History

  • 2015-09-22: Implemented as ranking reward
  • 2015-09-25: Became improvable
  • 2017-09-29: Stats increased: Armor+0 → Armor+1
  • 2020-01-14: Visible bonuses added
  • 2021-03-01: Visible bonuses added for Katori-classKatori
    Kashima

Fit Bonuses

Type 4 Passive Sonar Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
Yuubari Kai Ni DYuubari Kai Ni D (1st equipped) +3 +5 One-time
Noshiro Kai NiNoshiro Kai Ni (1st equipped) +2 +4 One-time
Katori-classKatori
Kashima
(1st equipped) +2 +3 One-time[1]
Isuzu Kai NiIsuzu Kai Ni
Yura Kai NiYura Kai Ni
Naka Kai NiNaka Kai Ni
Yuubari Kai Ni /TokuYuubari Kai Ni
Yuubari Kai Ni Toku

Shigure Kai SanShigure Kai San
Yukikaze Kai NiYukikaze Kai Ni
(1st equipped) +1 +3 One-time
Akizuki-classAkizuki
Teruzuki
Suzutsuki
Hatsuzuki
Fuyutsuki
(1st equipped) +1 +2 One-time

Improvement

Sonar.png Type 4 Passive Sonar

Improvement Not
Upgradable
★ Improvement
Level
0~5 6~9
Development material Consumed 5/7 6/10
Improvement material Consumed 3/5 4/6
Equipment
Consumed
Equipment Card Type 93 Passive Sonar.pngx2 Equipment Card Type 4 Passive Sonar.png
Items
Consumed
-
Resources Fuel10 Ammunition0 Steel50 Bauxite60
Ship Helper Conversion
Ship Banner Yuubari Kai Ni.png
Yuubari Kai Ni/Toku/D
-
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Isuzu Kai Ni.png
Isuzu Kai Ni
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Katori Kai.png
Katori Kai
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Akizuki.png
Akizuki/Kai
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Teruzuki.png
Teruzuki/Kai
Mon Tue Wed Thu Fri Sat Sun
Improvement Improved effects
SONAR 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.75 1.06 1.29 1.50 1.67 1.83 1.98 2.12 2.25 2.37
Anti-Submarine Warfare 0.67 0.94 1.15 1.33 1.49 1.63 1.76 1.89 2.00 2.11
Accuracy ASW 1.30 1.83 2.25 2.60 2.90 3.18 3.43 3.67 3.90 4.11
Evasion Torpedo 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74

See Also