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Type 4 SONAR

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Type 4 Passive Sonar

No.149 四式水中聴音機

SONAR Sonar

Effects: Armor+1 Accuracy+1 Anti-Submarine+12

Scrap Value: Steel1 Bauxite3

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

Development
CraftableImprovable
Refittable Class
Coastal Defense ShipDestroyer
Light CruiserTorpedo Cruiser
Heavy CruiserAviation Cruiser
BattleshipAviation Battleship
Fast BattleshipLight Carrier
Standard CarrierArmored Carrier
Seaplane TenderSubmarine Tender
SubmarineSubmarine Carrier
Repair ShipTraining Cruiser
Fleet OilerAmphibious 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: the "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 was equipped by some of the newer destroyers.

Notes

ASW Damage Synergy
SONARSmall Sonar SONARLarge Large Sonar
All Sonars
(Except Type 0 Passive SonarType 0 Passive Sonar)
Equipment Card Type 0 Passive Sonar.png Type 0 Passive SonarType 0 Passive Sonar
Depth ChargesDCP Depth Charge Projectors (DCP)
Equipment Card Type 94 Depth Charge Projector.png Type 94 Depth Charge ProjectorType 94 Depth Charge Projector Equipment Card Type 3 Depth Charge Projector.png Type 3 Depth Charge ProjectorType 3 Depth Charge Projector
Equipment Card Type 3 Depth Charge Projector (Concentrated Deployment).png Type 3 Depth Charge Projector (Concentrated Deployment)Type 3 Depth Charge Projector (Concentrated Deployment) Equipment Card Prototype 15cm 9-tube ASW Rocket Launcher.png Prototype 15cm 9-tube ASW Rocket LauncherPrototype 15cm 9-tube ASW Rocket Launcher
Equipment Card RUR-4A Weapon Alpha Kai.png RUR-4A Weapon Alpha KaiRUR-4A Weapon Alpha Kai
Depth ChargesDC Depth Charge (Racks) (DC)
Equipment Card Type 95 Depth Charge.png Type 95 Depth ChargeType 95 Depth Charge Equipment Card Type 2 Depth Charge.png Type 2 Depth ChargeType 2 Depth Charge
Equipment Card Lightweight ASW Torpedo (Initial Test Model).png Lightweight ASW Torpedo (Initial Test Model)Lightweight ASW Torpedo (Initial Test Model) Equipment Card Hedgehog (Initial Model).png Hedgehog (Initial Model)Hedgehog (Initial Model)
Depth ChargesOther Other
Equipment Card Type 2 12cm Mortar Kai.png Type 2 12cm Mortar KaiType 2 12cm Mortar Kai Equipment Card Type 2 12cm Mortar Kai (Concentrated Deployment).png Type 2 12cm Mortar Kai (Concentrated Deployment)Type 2 12cm Mortar Kai (Concentrated Deployment)
ASW Damage Modifiers
SONARLarge + Depth Charges 1.15x
SONARSmall + Depth ChargesDCP/ Depth ChargesOther 1.15x
SONARSmall + Depth ChargesDC 1.15x
Depth ChargesDCP + Depth ChargesDC 1.1x
SONARLarge + Depth ChargesDCP + Depth ChargesDC 1.265x
SONARSmall + Depth ChargesDCP + Depth ChargesDC 1.4375x
Armor Penetration
Indepentant of synergies, these equipment provide armor penetration to ASW attacks:

How To Obtain

Upgradeable from Type 93 Passive SonarType 93 Passive Sonar

From quests: B74

From limited-time quests: SB05

Event reward for:

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

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

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine View Range Armor Evasion Note
Yuubari Kai Ni DYuubari Kai Ni D +3 +5 Non-stackable
Noshiro Kai NiNoshiro Kai Ni +2 +4 Non-stackable
Isuzu Kai NiIsuzu Kai Ni
Naka Kai NiNaka Kai Ni
Yura Kai NiYura Kai Ni
Yuubari Kai Ni/TokuYuubari Kai Ni
Yuubari Kai Ni Toku

Yukikaze Kai NiYukikaze Kai Ni
+1 +3 Non-stackable
Akizuki-classAkizuki Kai
Teruzuki Kai
Hatsuzuki Kai
Suzutsuki Kai
+1 +2 Non-stackable
Katori-classKatori
Kashima
+2 +3 Non-stackable between itself, Type 93 Passive SonarType 93 Passive Sonar, Type 3 Active SonarType 3 Active Sonar

Akashi's Improvement Arsenal

Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
SONAR Type 4 SONAR 0 10 0 50 60 5/7 3/5 2xSonar.png  
 
 
A
 
 
Y
K
 
 
 
 
K
 
 
 
 
 
 
T
I
Y
 
 
 
I
 
 
 
 
I
 
 
 
 
Isuzu Kai Ni
Yuubari Kai Ni
Katori Kai
Akizuki
Teruzuki
6 6/10 4/6 1xSonar.png
10 - - -

See Also