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12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director

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No.296 12.7cm連装砲B型改四(戦時改修)+高射装置
GreenGunDP.png Small Caliber Main Gun (High-angle + Fire Director)
Effects: Firepower+3 AA+9 Armor+1 Accuracy+1 RangeShort
Scrap value: Ammo 3 Steel 2 Bauxite 2 (Unbuildable)

Equipment Card 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director.png

Equipment Character 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director.png

Equipment Item 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director.png

Equipment Full 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director.png

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

やや旧式化したB型砲の余剰装備に全面改修を実施、両用砲に換装した戦時改修if駆逐艦主砲です。
現実的な対空戦闘に対応するため、最大仰角、装填機構の換装、高射装置との連動等、従来のB型砲とは全く別の駆逐艦用兵装に昇華しています。
特II型以降、初春型、白露型などでの装備運用を想定して改修され、両用砲として対空戦闘も可能です。

A what-if remodel of what would happen if the remaining semi-obsolete Type-B guns underwent an extensive mid-war upgrade and conversion into dual-purpose main guns for destroyers.
In order to deal with the realities of anti-air combat, maximum elevation, and loading mechanisms have been improved. With the combination of a fire director, this Type-B gun has become an entirely new destroyer weapon.
It was meant to be equipped on the Special Type II, Special Type III, Hatsuharu-class, and Shiratsuyu-class after their upgrades. This dual-purpose gun is capable of anti-air combat.

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).

High-Angle Gun High-Angle Guns (sometimes "dual-purpose guns"), are anti-air focused guns, that can serve their main surface role, in addition to having extra Anti-Air AA stats.

  • They are notably required in most AACI.

Notes

How To Obtain

From quest: B121, B178 (★+4, choice), F78

Ranking reward for:

  • May 2018: 1-5
  • Oct 2018: 1-5 (★+2)
  • Dec 2019: 1-5 (★+3), 6-20 (★+2), 21-100 (★+1), 101-500

Event reward for:

Updates History

  • 2018-06-29: Implemented as ranking reward
  • 2020-02-07: Became improvable

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Shiratsuyu Kai NiShiratsuyu Kai Ni +2 +2
Shigure Kai NiShigure Kai Ni +2 +1 +1
Murasame Kai NiMurasame Kai Ni +1 +1 +2
Yuudachi Kai NiYuudachi Kai Ni +2 +1 +1
Umikaze Kai NiUmikaze Kai Ni
Kawakaze Kai NiKawakaze Kai Ni
Shiratsuyu KaiShiratsuyu Kai
Murasame KaiMurasame Kai 		+1 +2
Other Shiratsuyu-classShiratsuyuShigure
MurasameYuudachi
HarusameSamidare
SuzukazeUmikaze
YamakazeKawakaze 		+1 +1
All Shiratsuyu-classShiratsuyuShigure
MurasameYuudachi
HarusameSamidare
SuzukazeUmikaze
YamakazeKawakaze 		+ AIR Radar +6
+ LOS Radar +1 +3 +2
+ 61cm Quadruple (Oxygen) Torpedo Mount61cm Quadruple (Oxygen) Torpedo Mount +1 +3 Does not stack
+ 61cm Quadruple (Oxygen) Torpedo Mount Late Model61cm Quadruple (Oxygen) Torpedo Mount Late Model
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Hatsuharu-classHatsuharu
Nenohi
Wakaba
Hatsushimo
Ariake 		+1 +1
+ AIR Radar +5
+ LOS Radar +1 +2 +2
+ 61cm Triple (Oxygen) Torpedo Mount61cm Triple (Oxygen) Torpedo Mount +1 +3 Does not stack
+ 61cm Triple (Oxygen) Torpedo Mount Late Model61cm Triple (Oxygen) Torpedo Mount Late Model
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Shikinami Kai NiShikinami Kai Ni +3 +1 Replaces Ayanami-class base bonus.
All extra requirement bonuses still apply.
Amagiri Kai Ni (D)Amagiri Kai Ni
Amagiri Kai Ni D 		+4
Ayanami-classAyanami
Shikinami
Amagiri
Sagiri
Oboro
Akebono
Sazanami
Ushio
Akatsuki-classAkatsuki
Hibiki
Ikazuchi
Inazuma 		+1
+ AIR Radar +5
+ LOS Radar +1 +2 +2
+ 61cm Triple (Oxygen) Torpedo Mount61cm Triple (Oxygen) Torpedo Mount +1 +3 Does not stack
+ 61cm Triple (Oxygen) Torpedo Mount Late Model61cm Triple (Oxygen) Torpedo Mount Late Model

Improvement

GreenGunDP.png 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director

Improvement Not
Upgradable
★ Improvement
Level 		0~5 6~9
Development material Consumed 10/12 15/30
Improvement material Consumed 6/6 7/9
Equipment
Consumed 		Equipment Card 12.7cm Twin Gun Mount Model B Kai 2.pngx2 Equipment Card Type 94 Anti-Aircraft Fire Director.png
Items
Consumed 		-
Resources Fuel30 Ammunition90 Steel130 Bauxite50
Ship Helper Conversion
Ship Banner Shikinami Kai Ni.png
Shikinami Kai Ni
 -
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Shiratsuyu Kai Ni.png
Shiratsuyu Kai Ni
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Shigure Kai Ni.png
Shigure Kai Ni
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Shigure Kai San.png
Shigure Kai San
Mon Tue Wed Thu Fri Sat Sun
Improvement Improved effects
Main High-Angle GunMain 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
[math]\displaystyle{ \text{AdjAA}_\text{ship} }[/math] 3.00 4.24 5.19 6.00 6.70 7.34 7.93 8.48 9.00 9.48
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 3.00 4.24 5.19 6.00 6.70 7.34 7.93 8.48 9.00 9.48
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

v · e
Equipment List
Gallery • By Stats • Equipment Types & Icons • Development • Improvement
 
Main Guns
Foreign
10cm Twin HA Gun Mount (+ AAFD) • 12cm Single HA Gun Mount (Model E • Model E Kai) • 12.7cm HA Gun Mount (Single LM • Twin LM • Single Kai 2 • Twin Kai 2) • 12.7cm Twin HA Gun Mount (Model A Kai 3 + AAFD • Model B Kai 4 + AAFD)
Foreign
14 cm
15-15.5 cm/6 inch
20-20.3 cm/8 inch
30.5-32 cm
305mm/46 Gun Mount (Twin • Triple) (Ita) • 320mm/44 Gun Mount (Twin • Triple) (Ita) • 30.5cm Triple Gun Mount (Kai) (Sov)
35.6 cm/14 inch
38-38.1 cm
41 cm/16 inch
41cm Twin Gun Mount (Kai 2) • 41cm Triple Gun Mount (Proto • Kai • Kai 2) • 16inch Twin Gun Mount (Mk.I • Mk.V • Mk.VIII Kai) (US) • 16inch Triple Gun Mount (Mk.6 • Mk.6 + GFCS • Mk.6 mod.2 • Mk.7 • Mk.7 + GFCS) (US) • 16inch Triple Gun Mount (Mk.I • Mk.I + AFCT Kai • Mk.I Kai + FCR Type 284) (UK)
46 cm
 
Secondary Guns
Surface
Foreign
 
Anti-Air
 
Torpedo Weapons
53cm Twin Torpedo Mount • 53cm Bow O2 Torpedoes • 61cm Torpedo Mount (Triple • Triple O2 • Triple O2 LM • Quad • Quad O2 • Quad O2 LM • Quintuple O2 • Proto Sext O2) • 533mm Quint Torpedo Mount (Initial Model • Late Model) (US) • 533mm Triple Torpedo Mount (Model 53-39) (Sov)
Late Model Bow Torpedo Mount (4 tubes) (+ Skilled Sonar Personnel) • Late Model Bow Torpedo Mount (6 tubes) (+ Skilled Sonar Personnel) • Submarine 53cm Bow Torpedo Mount (8 tubes) (Late Model) • Prototype FaT Type 95 Oxygen Torpedo Kai (IJN/Ger) • 21inch 4-tube Bow Torpedo Launcher (Initial Model • Late Model) (US) • 21inch 6-tube Bow Torpedo Launcher (Initial Model • Late Model) (US) • Submarine 4-tube Stern Torpedo Launcher (Initial Model • Late Model) (US)
Kouhyouteki (Type A • Type C • Type D Kai)
 
Carrier-Based Planes
Other (IJN)
Type 96 (Kai) • Shiden (Kai 2 • Kai 4) • Reppuu (Prototype LM • Model 11 • 601 • Kai • Kai 2 • Kai 2 (CD1/Skilled)) • Prototype Jinpuu • Shinden Kai
Foreign
Bf 109 T Kai (IJN/Ger) • Fw190 (T Kai • A-5 Kai (Skilled)) (IJN/Ger) • Reggiane (2001 OR Kai • 2005 Kai) (IJN/Ita) • Wildcat (F4F-3 • F4F-4) (US) • Hellcat (F6F-3 • F6F-5) (US) • XF5U (US) • FR-1 Fireball (US) • Fulmar (UK) • Seafire Mk.III Kai (UK) • Corsair Mk.II (Ace) (UK/US)
Reppuu Kai 2 Model E (CD1/Skilled) • Hellcat (F6F-3N • F6F-5N) (US) • F4U-2 Night Corsair (US)
Foreign
Ju.87C (Kai • Kai 2 KMX • Kai 2 KMX/Skilled) (IJN/Ger) • Re.2001 CB Kai (IJN/Ita) • Dauntless (SBD • SBD-5) (US) • Helldiver (SB2C-3 • SB2C-5) (US) • Corsair (F4U-1D (US) • F4U-4 (US) • AU-1 (US) • F4U-7 (Fr/US)) • FM-2 (US) • Skua (UK)
Type 97 (Skilled • 931 • 931/Skilled • Tomonaga • Murata) • Tenzan (601 • 931 • Model 12A • Tomonaga • Murata) • Ryuusei (Kai • Kai Skilled • 601 • CD1 • CD1/Skilled)
Foreign
Re.2001 G Kai (IJN/Ita) • TBD (US) • TBF (US) • Swordfish (Mk.II Skilled • Mk.III Skilled) (UK) • Barracuda (Mk.II • Mk.III) (UK) • Mosquito TR Mk.33 (UK)
 
Land-Based Planes
Toukai (Proto • 901)
"Army"
Type 1 Fighter Hayabusa (Model II • Model II (64) • Model IIIA • Model IIIA (54)) (IJA) • Type 3 Fighter Hien (Model 1D • 244) (IJA) • Type 4 Fighter Hayate (IJA) • Type 2 Two-seat Fighter Toryuu (Model C) (IJA) • Ki-96 (IJA) • Fw 190 D-9 (Ger) • Spitfire (Mk.I • Mk.V • Mk.IX Skilled) (UK)
"Navy"
Raiden • Shiden (Model 11 • Kai • Kai 343/301 • Kai 343/407 • Kai 343/701) • Type 0 Fighter (Model 22 (251) • Model 21 (Tainan) • Model 32 (Tainan)) • Reppuu Kai (352/Skilled)
Jets
HA
Me 163B (Ger) • Shuusui (Proto)
 
Seaplanes
Zuiun (631 • 634 • 634/Skilled • Model 12 • Model 12 (634) • Kai 2 (634) • Kai 2 (634/Skilled)) • Seiran (Prototype • 631) • Swordfish (Mk.III Kai • Mk.III Kai Skilled) (UK/Swe) • Laté 298B (Fr)
Type 2 Kai (Skilled) • Kyoufuu (Kai • Kai 2) • Ro.44 Seaplane Fighter (bis) (Ita)
 
Radars
 
Anti-Submarine Warfare
Ka Type Observation Autogyro (IJA) • O Type Observation Autogyro (Kai • Kai 2) (IJA) • S-51J (Kai) (JMSDF/US)
 
Miscellaneous
Night Battle Aid
Facility & Crew
Consumables
Others
Unreleased & removed
SB2U
HA - High-Angle or High-Altitude; DP - Dual-Purpose; LM - Late Model; CD - Concentrated Deployment or Carrier Division
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