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Prototype 20.3cm (No.4) Twin Gun Mount

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No.520 試製20.3cm(4号)連装砲
RedGunMedium.png Medium Caliber Main Gun
Effects: Firepower+11 AA+4 Armor+1 Accuracy+2 RangeMedium
Scrap value: Ammo 4 Steel 6 Bauxite 10 (Unbuildable)

Equipment Card Prototype 20.3cm (No.4) Twin Gun Mount.png

Equipment Character Prototype 20.3cm (No.4) Twin Gun Mount.png

Equipment Item Prototype 20.3cm (No.4) Twin Gun Mount.png

Equipment Full Prototype 20.3cm (No.4) Twin Gun Mount.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

我が国の重巡洋艦用主砲20.3cm連装砲、その3号砲のif改良型です。
55口径の同重巡用主砲をさらに熟成、改良型の6m測距儀と射撃速度の向上、装弾構造の改良と誘爆防止、さらに水上電探との連携にも考慮した日本重巡のif後期型主砲兵装です。

This is an improved version of No.3 Japan's 20.3 cm main gun for heavy cruisers.
It is a what if version of the 55 caliber heavy cruiser main gun that has been further matured, with an improved 6 m rangefinder, an increased firing speed, an improved ammunition structure and explosion prevention, and further ameliorations given to cooperate with radars.

Mechanics

Main GunsSmall Caliber Main GunMedium Caliber Main GunLarge Caliber Main Gun are the main armament used by surface ships. Their main stats are the "firepower" Firepower and "accuracy" Accuracy. They are notably required to trigger all Artillery Spotting attacks as well as some Night Cut-Ins, notably the "Double Attack" (DA).

Notes

How To Obtain

Upgradeable from: 20.3cm (No.3) Twin Gun Mount20.3cm (No.3) Twin Gun Mount

From quest: B196 (★+2, choice)

Updates History

  • 2024-01-25: Implemented

Fit Bonuses

Prototype 20.3cm (No.4) Twin Gun Mount Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
All Furutaka-classFurutaka
Kako

All Aoba-classAoba
Kinugasa

All Myoukou-classMyoukou
Nachi
Ashigara
Haguro

All Takao-classTakao
Atago
Maya
Choukai

All Mogami-classMogami
Mikuma
Suzuya
Kumano

All Tone-classTone
Chikuma
+ 12.7cm Twin High-angle Gun Mount12.7cm Twin High-angle Gun Mount OR 8cm High-angle Gun8cm High-angle Gun OR 10cm Twin High-angle Gun Mount (Carriage)10cm Twin High-angle Gun Mount (Carriage) OR 12.7cm High-angle Gun + Anti-Aircraft Fire Director12.7cm High-angle Gun + Anti-Aircraft Fire Director OR 8cm High-angle Gun Kai + Additional Machine Guns8cm High-angle Gun Kai + Additional Machine Guns OR 10cm Twin High-angle Gun Mount Kai + Additional Machine Guns10cm Twin High-angle Gun Mount Kai + Additional Machine Guns OR 10cm Twin High-angle Gun Mount Battery Concentrated Deployment10cm Twin High-angle Gun Mount Battery Concentrated Deployment +1 +4 +1 +4 One-time
Mikuma Kai Ni TokuMikuma Kai Ni Toku (★0-6) +5 +1 +3 +1
(★7-9) +6 +1 +3 +1
(★MAX) +6 +1 +4 +1
(2nd equipped) +2 One-time
(3rd equipped) +2 One-time
+ Surface Radar +4 +2 +3 +3 One-time
+ Type 21 Air RadarType 21 Air Radar OR Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +1 +3 +1 +2 One-time
+ Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +2 +3 +1 +2 One-time
Mikuma Kai NiMikuma Kai Ni (★0-6) +5 +2 +1
(★7-9) +6 +2 +1
(★MAX) +6 +3 +1
(2nd equipped) +2 One-time
(3rd equipped) +2 One-time
+ Surface Radar +4 +2 +3 +3 One-time
+ Type 21 Air RadarType 21 Air Radar OR Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +1 +3 +1 +2 One-time
+ Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +2 +3 +1 +2 One-time
Mogami Kai Ni /TokuMogami Kai Ni
Mogami Kai Ni Toku

Suzuya Kai NiSuzuya Kai Ni
Kumano Kai NiKumano Kai Ni
(★0-6) +4 +1 +1
(★7-9) +5 +1 +1
(★MAX) +5 +2 +1
(2nd equipped) +2 One-time
(3rd equipped) +2 One-time
+ Surface Radar +4 +2 +3 +3 One-time
+ Type 21 Air RadarType 21 Air Radar OR Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +1 +3 +1 +2 One-time
+ Type 21 Air Radar Kai 2Type 21 Air Radar Kai 2 +2 +3 +1 +2 One-time
Myoukou Kai /NiMyoukou Kai
Myoukou Kai Ni

Takao KaiTakao Kai
Other Mogami-classMogami
Mikuma
Suzuya
Kumano

Tone-classTone
Chikuma
- +3 +1 +1
(2nd equipped) +2 One-time
(3rd equipped) +2 One-time
+ Surface Radar +3 +2 +1 +2 One-time
Other Myoukou-classMyoukou
Nachi
Ashigara
Haguro

Other Takao-classTakao
Atago
Maya
Choukai
- +2 +1
+ Surface Radar +3 +2 +1 +2 One-time
Furutaka-classFurutaka
Kako

Aoba-classAoba
Kinugasa
- +1
+ Surface Radar +2 +2 +1 +1 One-time

Improvement

RedGunMedium.png Prototype 20.3cm (No.4) Twin Gun Mount

Improvement Not
Upgradable
★ Improvement
Level
0~5 6~9
Development material Consumed 7/8 9/14
Improvement material Consumed 4/4 6/7
Equipment
Consumed
Equipment Card 20.3cm Twin Gun Mount.pngx4 Equipment Card 20.3cm Twin Gun Mount.pngx8
Items
Consumed
-
Resources Fuel20 Ammunition140 Steel190 Bauxite40
Ship Helper Conversion
Ship Banner Mikuma Kai Ni.png
Mikuma Kai Ni/Toku
-
Mon Tue Wed Thu Fri Sat Sun
Improvement Improved effects
Medium Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Day 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Night 1.30 1.84 2.25 2.60 2.91 3.18 3.44 3.68 3.90 4.11

See Also