Prototype 15cm 9-tube ASW Rocket Launcher

No.288 試製15cm9連装対潜噴進砲
DepthCharge.png Depth Charge
Effects: ASW+15 Accuracy+1
Scrap value: Ammo 9 Steel 3 Bauxite 2 (Unbuildable)

Equipment Card Prototype 15cm 9-tube ASW Rocket Launcher.png

Equipment Character Prototype 15cm 9-tube ASW Rocket Launcher.png

Equipment Item Prototype 15cm 9-tube ASW Rocket Launcher.png

Equipment Full Prototype 15cm 9-tube ASW Rocket Launcher.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

爆雷投下軌条は艦の後方、従来型の三式爆雷投射機は艦の舷側方向に爆雷を投射可能でしたが、艦首方向にも爆雷を投射可能な新対潜装備が本噴進爆雷砲です。
まだ、試作段階で欧米の同種兵装に比べて発展途上ではありますが、和製ヘッジホッグに発展する可能性もあった兵装です。

Depth charge launchers on ships' sterns and existing Type 3 depth charge projectors could throw depth charges to the sides of a ship, but this rocket launcher could throw depth charges ahead of the ship's bow as well.
This system was still a mere prototype in comparison to Western developments of similar weaponry, but it had the potential to become something akin to a Japanese-made Hedgehog.

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 limited-time quest: Su09, 2401 B3 (x2, choice)

Ranking reward for:

  • Nov 2021: 1-5 (★+5), 6-20 (★+4), 21-100 (★+3), 101-500 (★+2)

Event reward for:

Updates History

  • 2018-05-15: Implemented
  • 2020-01-14: Visible bonuses added

Fit Bonuses

Ship Extra Requirement               Note
Isuzu Kai Ni 
Naka Kai Ni 
Yura Kai Ni 
Yukikaze Kai Ni 
+2 +1
Yuubari Kai Ni D  +1 +3 +2
Noshiro Kai Ni  +4 +1
Katori-class 
 
+3 +2 Added 2021-03-01

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