Type 2 12cm Mortar Kai

[Edit] Type 2 12cm Mortar Kai No.346 二式12cm迫撃砲改
Depth Charge Effects: +3 +1 Provides bonuses against installations Scrap value: 1 2 1 1 (Unbuildable)
Refittable Ship Types
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, greatly enhancing ASW Damage Synergy. Their main stat is "ASW" .

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

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 affected equipment are: DCR: Type 95 DC, Type 2 DC, Lightweight ASW Torpedo, Hedgehog, Type 2 DC K2 DCP: RUR-4A Weapon Alpha Kai, Mk.32 ASW Torpedo (Mk.2 Thrower). 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, Visible Bonuses and Improvements are not counted here. [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

Stock equipment of: Mikura Kai, Shinshuu 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:

• Summer 2019 Event E-1: Hard (x2), Medium (x2), Easy

Exchange reward from Sardines 2019

Uses

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

Updates History

• 2019-07-30: Implemented as ranking reward
• 2019-08-08: Became improvable and upgradeable to Type 2 12cm Mortar Kai (Concentrated Deployment)

Fit Bonuses

Ship	Extra Requirement								Note
Yamashio Maru					+1			+1	One-time

Improvement

Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	Type 2 12cm Mortar Kai	0	20	120	30	10	2/3	2/2	1x	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	1x
		10					18/30	6/9	2x 1x

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