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Hedgehog (Initial Model)

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Hedgehog (Initial Model)

No.439 Hedgehog(初期型)

Depth Charges Depth Charge

Effects: Armor-1 Accuracy+3 Anti-Submarine+18

Scrap Value: Fuel1 Ammunition13 Steel1 Bauxite2

Equipment Card Hedgehog (Initial Model).png

Equipment Character Hedgehog (Initial Model).png

Equipment Item Hedgehog (Initial Model).png

Equipment Full Hedgehog (Initial Model).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

紅茶の国が開発した強力な対潜兵装です。対潜爆雷に代替する次世代の対潜兵装として開発された、前方投射式の多弾散布型の対潜迫撃砲です。ハリネズミと呼ばれたこの革新的な新型対潜兵装は、比較的シンプルな構造でありながら対潜戦闘に大きな進化をもたらし、改良を施されつつ戦後の艦艇にも装備運用されていきます。

A powerful anti-submarine weapon developed by the Country of Tea.
It's a next-generation anti-submarine weapon designed to replace depth charges. It's a forward-projecting multi-round anti-submarine mortar.
This innovative new anti-submarine weapon is known as the Hedgehog. It has a simple construction but it's a revolution in anti-submarine warfare. After some upgrades, it was deployed aboard post-war ships.

Notes

ASW Damage Synergy
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
SONARLarge Large Sonars
Equipment Card Type 0 Passive Sonar.png
Type 0 Passive Sonar
Depth ChargesDCP 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 ChargesDCR 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
Depth ChargesOther 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
SONAR + Depth Charges 1.15x
Depth ChargesDCP + Depth ChargesDCR 1.1x
SONARLarge + Depth ChargesDCP + Depth ChargesDCR 1.265xSONARLarge + Depth Charges = 1.15x
Depth ChargesDCP + Depth ChargesDCR = 1.1x

1.15 * 1.1(1 + 0.1) = 1.265x
SONARSmall + Depth ChargesDCP + Depth ChargesDCR 1.4375xSONARSmall + Depth ChargesDCP / Depth ChargesOther = 1.15x
SONARSmall + Depth ChargesDCR = 1.15x
Depth ChargesDCP + Depth ChargesDCR = 1.1x

1.15 * 1.25(1 + 0.1 + 0.15) = 1.4375
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,
  • Armor penetration from equipment stacks,
  • The final armor of the targetted submarine cannot go below 1.

How To Obtain

From quests: F112

Event reward for:

Ranking reward for:

  • Sep 2021: 1-5
  • Dec 2021: 1-5 (★+2), 6-20, 21-100, 101-500

Updates History

  • 2021-10-29: Implemented as Event Reward

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
US ShipsAtlanta
Helena
Honolulu
Fletcher
Johnston
Samuel B. Roberts

British ShipsSheffield
Jervis
Janus
+3 +1 One-time
Matsu-classMatsu
Take
Ume
Momo

Coastal Defense Ships (DE)
+2 +1 One-time
Other Destroyers
Other Light Cruisers
Training Cruisers
+1 +1 One-time

See Also