Hedgehog (Initial Model)

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No.439 Hedgehog(初期型)
DepthCharge.png Depth Charge
Effects: Armor-1 ASW+18 Accuracy+3
Scrap value: Fuel 1 Ammo 13 Steel 1 Bauxite 2 (Unbuildable)

Equipment Card Hedgehog (Initial Model).png

Equipment Character Hedgehog (Initial Model).png

Equipment Item Hedgehog (Initial Model).png

Equipment Full Hedgehog (Initial Model).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

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.

Mechanics

  Depth Charges are one of the main equipment used for ASW, 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 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,
  • [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

From quest: F112

Ranking reward for:

  • Sep 2021: 1-5
  • Dec 2021: 1-5 (★+2), 6-20, 21-100, 101-500
  • Jul 2023: 1-5 (★+1)
  • Feb 2024: 1-5 (★+3)

Event reward for:

Updates History

  • 2021-10-29: Implemented as Event Reward

Fit Bonuses

Hedgehog (Initial Model) Equipment Bonuses
Ship Extra Requirement                 Note
United States Navy Vessels
Royal Navy Vessels
(1st equipped) +3 +1 One-time
All DE
Matsu-class 
 
 
 
(1st equipped) +2 +1 One-time
Other DD
Other CL
All CT
(1st equipped) +1 +1 One-time

Improvement

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

See Also