Type144/147 ASDIC

[Edit] Type144/147 ASDIC No.261 Type144/147 ASDIC
Small Sonar Effects: +13 +3 +1 Scrap value: 1 5 (Unbuildable)
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

紅茶の国で開発された対潜探知システム「ASDIC」。
その改良発展型です。
我が水中探信儀にあたるシステムですが、対潜探知技術の蓄積と144型と147型の複合装備により、精度が大きく向上しています。
ヘッジホッグやスキッドなどの進んだ対潜火器と組み合わせることで、より強力なASW(対潜戦)が可能となります。

The anti-submarine detection system developed in the country of tea, "ASDIC".
This is an improved model.
Although it is analogous to our active sonars, the anti-submarine detection technology implemented makes the Type 144 and Type 147 have superior accuracy.
By pairing it with advanced anti-submarine equipment such as the Hedgehog and the Squid, you can have more powerful ASW attacks.

Mechanics

Sonars are the main equipment used for ASW, being required to trigger most OASW, and 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 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

Not to be confused with other equipment of this family (see here).

How To Obtain

Stock equipment of: Janus Kai, Javelin Kai

Upgradeable from: Type124 ASDIC

From limited-time quest: SB49 (choice)

Ranking reward for:

• Aug 2017: 1-5, 21-100
• Apr 2023: 1-5 (★+4), 6-20 (★+4), 21-100 (★+2), 101-500 (★+1)
• July 2024: 21-100 (★+3)

Event reward for:

• Fall 2019 Event E-2: Medium
• Fall 2021 Event E-2: Medium (★+2)

Updates History

• 2017-09-28: Implemented as ranking reward
• 2024-10-18: Became improvable

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
ASW	1.30	1.83	2.25	2.60	2.90	3.18	3.43	3.67	3.90	4.11
Torpedo	1.50	2.12	2.59	3.00	3.35	3.67	3.96	4.24	4.50	4.74

See Also

• ASDIC