Prototype 20.3cm (No.4) Twin Gun Mount

[Edit] Prototype 20.3cm (No.4) Twin Gun Mount No.520 試製20.3cm(4号)連装砲
Medium Caliber Main Gun Effects: +11 +4 +1 +2 Medium Scrap value: 4 6 10 (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

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

• Most main guns come with "Hidden Fit Bonuses/Penalties", especially larger ones.

Notes

How To Obtain

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

From limited-time quest: 2411 F1 (★+2)

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									Note
All Furutaka-class All Aoba-class All Myoukou-class All Takao-class All Mogami-class All Tone-class	+ 12.7cm Twin High-angle Gun Mount OR 8cm High-angle Gun OR 10cm Twin High-angle Gun Mount (Carriage) OR 12.7cm High-angle Gun + Anti-Aircraft Fire Director OR 8cm High-angle Gun Kai + Additional Machine Guns OR 10cm Twin High-angle Gun Mount Kai + Additional Machine Guns OR 10cm Twin High-angle Gun Mount Battery Concentrated Deployment	+1		+4				+1	+4	One-time
Mikuma 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 Radar OR Type 21 Air Radar Kai 2	+1		+3				+1	+2	One-time
	+ Type 21 Air Radar Kai 2	+2		+3				+1	+2	One-time
Mikuma 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 Radar OR Type 21 Air Radar Kai 2	+1		+3				+1	+2	One-time
	+ Type 21 Air Radar Kai 2	+2		+3				+1	+2	One-time
Mogami Kai Ni /Toku Suzuya Kai Ni Kumano 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 Radar OR Type 21 Air Radar Kai 2	+1		+3				+1	+2	One-time
	+ Type 21 Air Radar Kai 2	+2		+3				+1	+2	One-time
Myoukou Kai /Ni Takao Kai Other Mogami-class Tone-class	-	+3						+1	+1
	(2nd equipped)	+2								One-time
	(3rd equipped)	+2								One-time
	+ Surface Radar	+3	+2					+1	+2	One-time
Other Myoukou-class Other Takao-class	-	+2							+1
	+ Surface Radar	+3	+2					+1	+2	One-time
Furutaka-class Aoba-class	-	+1
	+ Surface Radar	+2	+2					+1	+1	One-time

Improvement

Prototype 20.3cm (No.4) Twin Gun Mount
Improvement			Not Upgradable
★ Improvement Level	0~5	6~9
Consumed	7/8	9/14
Consumed	4/4	6/7
Equipment Consumed	x4	x8
Items Consumed	-
Resources	20 140 190 40

Ship Helper	Conversion
Mikuma Kai Ni/Toku	-
Mon		Tue	Wed	Thu	Fri	Sat	Sun

Improvement effects
	1★	2★	3★	4★	5★	6★	7★	8★	9★	Max★
	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
Day	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
Night	1.30	1.84	2.25	2.60	2.91	3.18	3.44	3.68	3.90	4.11

See Also

• 20 cm/50 3rd Year Type naval gun