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Prototype Long-barrel 12.7cm Twin Gun Mount Model A Kai 4
[Edit]
No.455 試製 長12.7cm連装砲A型改四
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 Small Caliber Main GunEffects:
 +4  +3  +1  +2  ShortScrap value:
 2  3  2 (Unbuildable) | |
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| 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
大戦時は旧式化したものの、特I型駆逐艦に採用された近代的駆逐艦用主砲の先駆けであるA型砲。
本兵装をテストベッドに砲身を延長更新、初速を高めたif拡張改装の試製兵装です。
対水上戦闘に主軸を置いた各種改良により、駆逐艦主砲としては最大級の火力を誇ります。
基本設計の限界はありますが対空戦闘も可能、次世代の12.7cm砲へ繋ぐ試製砲です。
Though obsolete at the outset of World War 2, the Type-A gun mounted on the Special Type I destroyers was the forerunner of modern destroyer guns.
Using the Type-A as a base, this is a what-if upgrade that extends the barrel length and increases muzzle velocity.
It is among the destroyer main guns with the highest firepower thanks to several upgrades that focus on increasing surface combat ability.
Though the basic design has limitations, it is capable of limited anti-air combat. This is the predecessor to the next generation of 12.7cm guns.
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.
- Small Caliber Main Guns bring some accuracy bonus against PT Imp.
Notes
How To Obtain
Upgradeable from: 12.7cm Twin Gun Mount Model A Kai 2
From quest: B179
Updates History
- 2022-04-01: Implemented
Fit Bonuses
| Ship | Extra Requirement |
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Note |
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Fubuki-class        Ayanami-class         Akatsuki-class    
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+2 | +1 | |||||||
| Fubuki-class
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+1 | ||||||||
| Uranami Base/Kai
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+1 | ||||||||
Uranami Kai Ni
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+2 | +1 | +1 | +1 | |||||
Isonami Kai Ni
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+1 | +1 | |||||||
| + LOS Radar | +3 | +1 | +2 | One-time | |||||
| + AIR Radar | +4 | One-time | |||||||
+ 61cm Triple Torpedo Mount OR 61cm Triple (Oxygen) Torpedo Mount OR 61cm Triple (Oxygen) Torpedo Mount Late Model
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+1 | +3 | One-time | ||||||
| + 2nd 61cm Triple Torpedo Mount OR 61cm Triple (Oxygen) Torpedo Mount OR 61cm Triple (Oxygen) Torpedo Mount Late Model
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+1 | +2 | One-time | ||||||
| + 61cm Triple (Oxygen) Torpedo Mount Late Model
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+1 | One-time |
Improvement
| Type | Name | ★ | Resource | Day | 2nd Ship | Note | ||||||||||||
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Sun | Mon | Tue | Wed | Thu | Fri | Sat | |||||
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Prototype Long-barrel 12.7cm Twin Gun Mount Model A Kai 4 | 0 | 10 | 70 | 100 | 20 | 5/6 | 3/3 | 3x
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U | X | X | X | U | U | U | Uranami Kai Ni
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| 6 | 7/8 | 3/6 | 1x
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| 10 | - | - | - | |||||||||||||||
Improvement  effects
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1★ | 2★ | 3★ | 4★ | 5★ | 6★ | 7★ | 8★ | 9★ | Max★ |
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1.00 | 1.41 | 1.73 | 2.00 | 2.23 | 2.44 | 2.64 | 2.82 | 3.00 | 3.16 |
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1.00 | 1.41 | 1.73 | 2.00 | 2.23 | 2.44 | 2.64 | 2.82 | 3.00 | 3.16 |
| Day
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1.00 | 1.41 | 1.73 | 2.00 | 2.23 | 2.44 | 2.64 | 2.82 | 3.00 | 3.16 |
| Night
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1.30 | 1.84 | 2.25 | 2.60 | 2.91 | 3.18 | 3.44 | 3.68 | 3.90 | 4.11 |