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Type 2 12cm Mortar Kai

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No.346 二式12cm迫撃砲改
DepthCharge.png Depth Charge
Effects: ASW+3 Evasion+1
Provides bonuses against installations
Scrap value: Fuel 1 Ammo 2 Steel 1 Bauxite 1 (Unbuildable)

Equipment Card Type 2 12cm Mortar Kai.png

Equipment Character Type 2 12cm Mortar Kai.png

Equipment Item Type 2 12cm Mortar Kai.png

Equipment Full Type 2 12cm Mortar Kai.png

Refittable Class
Coastal Defense Ship Destroyer
Light Cruiser Torpedo Cruiser
Heavy Cruiser Training Cruiser
Aviation Cruiser Fast Battleship
Battleship Aviation Battleship
Light Carrier Standard Aircraft Carrier
Armored Carrier Seaplane Tender
Submarine Aircraft Carrying Submarine
Submarine Tender Fleet Oiler
Repair Ship Amphibious Assault Ship

Introduction

元々は大戦後半期に日本陸軍が開発した陸戦用の迫撃砲です。十分な対潜装備のなかった陸軍の船舶などに搭載され、前方投射型の対潜火器としても運用されました。本兵装は同迫撃砲をさらに改良した艦載用強化型です。爆雷投射機の代替として、また限定的ながら対地攻撃も可能です。

This mortar was originally developed by the Imperial Japanese Army in the latter half of the war. It was mounted forwards for anti-submarine use on IJA ships that did not have sufficient anti-submarine equipment. This is an improved shipborne model of that mortar. It can substitute for a depth charge projector and is also capable of limited ground attacks.

Mechanics

Depth Charges are one of the main equipment used for ASW, being required to trigger an OASW, and greatly enhancing ASW Damage Synergy. Their main stat is "ASW" Anti-Submarine Warfare.

ASW Mortars have additional Anti-Installation bonuses similar to Anti-Ground Rockets.

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 Ni.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} }[/math]
SONAR + Depth Charges 1.15x
Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.1x
Large SONARLarge + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.265xLarge SONARLarge + Depth Charges = 1.15x
Depth Charge ProjectorDCP + Depth Charge RacksDCR = 1.1x

1.15 * 1.1(1 + 0.1) = 1.265x
Small SONARSmall + Depth Charge ProjectorDCP + Depth Charge RacksDCR 1.4375xSmall SONARSmall + Depth Charge ProjectorDCP / ASW MortarOther = 1.15x
Small SONARSmall + Depth Charge RacksDCR = 1.15x
Depth Charge ProjectorDCP + Depth Charge RacksDCR = 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.

Notes

How To Obtain

Stock equipment of: Mikura KaiMikura Kai, Shinshuu Maru KaiShinshuu Maru Kai

From quest: By7 (x2, choice), B139 (x3, choice), C37 (choice), F89, F90 (choice)

From limited-time quest: 2010LQ1 (x2, choice), 2103B1 (choice), W20B1 (choice), 2203 B1 (choice)

Ranking reward for:

  • Jun 2019: 1-5, 6-20, 21-100 (x2), 101-500
  • Jul 2019: 21-100, 101-500

Event reward for:

Exchange reward from Sardines 2019

Uses

Used to improve: Type 2 12cm Mortar KaiType 2 12cm Mortar Kai, Soukoutei (Armored Boat Class)Soukoutei (Armored Boat Class), Armed DaihatsuArmed Daihatsu

Updates History

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Yamashio MaruYamashio Maru +1 +1 One-time

Improvement

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
Depth Charges Type 2 12cm Mortar Kai 0 20 120 30 10 2/3 2/2 1xDrum  
 
Ka
Ya
 
 
 
Ya
 
 
 
Ya
Ni
 
 
Ya
Ni
AMK
Ka
Ya
Ni
AMK
Ka
Ya
Ni
 
Ka
Ya
Nisshin
Akitsu Maru Kai
Kamikaze
Yamashio Maru
Uses Drum Canister for improvement up to ★+6
Uses Type 94 Depth Charge Projector for improvement past ★+6
Uses 2x Type 2 12cm Mortar Kai and Action Report for upgrade to Type 2 12cm Mortar Kai (Concentrated Deployment)
6 4/6 3/4 1xDepthCharge.png
10 18/30 6/9 2xDepthCharge.png
1xAction Report
Improvement Improved effects
Depth Charges 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

See Also