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Improvement/Categories

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The effect given by improvements for every equipment categories.

  • Note that those categories do not perfectly match in-game equipment categories (eg. Dive Bombers & Fighter-Bombers).
  • The improvement effects are unknown for some equipment types/cases.

(Very) Large Guns

Improvement Improved effects
Large Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
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

Medium (Red) Guns

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

Small (Red) Guns

Improvement Improved effects
Small 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

HA Green Main (7- AA)

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] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
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

HA Green Main (8+ AA)

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

90mm Single High-angle Gun Mount

Improvement Improved effects
Secondary High-Angle GunSec 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

HA Green Sec (7- AA & 4- FP)

Improvement Improved effects
Secondary High-Angle GunSec 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Night Battle Power 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
[math]\displaystyle{ \text{AdjAA}_\text{ship} }[/math] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
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

HA Green Sec (8+ AA & 4- FP)

Improvement Improved effects
Secondary High-Angle GunSec 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Night Battle Power 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
[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

HA Green Sec (8+ AA & 5+ FP)

Improvement Improved effects
Large Secondary High-Angle GunSp_Sec 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Night Battle Power 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Anti-Air Ship 3.00 4.24 5.19 6.00 6.70 7.34 7.93 8.48 9.00 9.48
Anti-Air Fleet 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

Yellow Sec (4- FP)

Improvement Improved effects
Secondary Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Night Battle Power 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
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

Yellow Sec (5+ FP)

Improvement Improved effects
Secondary Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
Night Battle Power 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
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

15.2cm Single Gun Mount & OTO 152mm Triple Rapid Fire Gun Mount

Improvement Improved effects
Secondary 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

AAFD (7- AA)

Improvement Improved effects
Anti-Aircraft Fire Director 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] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
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

AA Guns (7- AA)

Improvement Improved effects
Anti-Aircraft 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
Torpedo Attack 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79
[math]\displaystyle{ \text{AdjAA}_\text{ship} }[/math] 4.00 5.66 6.93 8.00 8.94 9.80 10.58 11.31 12.00 12.65
Accuracy Torpedo 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32

AA Guns (8+ AA)

Improvement Improved effects
Anti-Aircraft 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
Torpedo Attack 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79
[math]\displaystyle{ \text{AdjAA}_\text{ship} }[/math] 6.00 8.49 10.39 12.00 13.42 14.70 15.87 16.97 18.00 18.97
Accuracy Torpedo 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32

Torpedoes

Improvement Improved effects
Torpedoes 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Torpedo 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32

Minisubs

Improvement Improved effects
Midget SubmarineMinisub 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16

(Large) Carrier Recons

Improvement Improved effects
Reconnaissance Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Large Flying Boats

Improvement Improved effects
Large Flying Boat 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Seaplane Recons

Improvement Improved effects
Reconnaissance SeaplaneRecon 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Night Recons

Improvement Improved effects
Night Reconnaissance Seaplane 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Seaplane Bombers

Improvement Improved effects
Seaplane BomberBomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Dive Bomber Attack 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Land-Based Attackers

Improvement Improved effects
Land-based Attack Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Dive Bomber Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Anti-Air 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58

Land-Based Assault Aircraft

Improvement Improved effects
Land-based Assault Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Dive Bomber Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Anti-Air 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58

Land-Based Patrol

Improvement Improved effects
Land-based Patrol Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Dive Bomber Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Anti-Air 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58
Anti-Submarine Warfare? 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0

Land-Based Heavy Bombers

Improvement Improved effects
Land-based Heavy Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Dive Bomber Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Anti-Air 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58

Bomb-carrying Type 1 Fighter Hayabusa Model III Kai (65th Squadron)

Improvement Improved effects
Land-based Fighterbomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Dive Bomber Attack 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Anti-Air 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58
Note
  • The Torpedo Attack torpedo stats given by improvement is only effective against DD.

Large Surface Radars (3+ Acc)

Improvement Improved effects
Large RADARLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42
Accuracy Day 1.70 2.40 2.94 3.40 3.80 4.16 4.50 4.81 5.10 5.38
Accuracy Night 1.60 2.26 2.77 3.20 3.58 3.92 4.23 4.53 4.80 5.06

Small Surface Radars (3+ Acc)

Improvement Improved effects
Small RADARSmall 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.25 1.76 2.16 2.50 2.79 3.06 3.30 3.53 3.75 3.95
Accuracy Day 1.70 2.40 2.94 3.40 3.80 4.16 4.50 4.81 5.10 5.38
Accuracy Night 1.60 2.26 2.77 3.20 3.58 3.92 4.23 4.53 4.80 5.06

(Very) Large Dual Purpose Radars (3+ Acc)

Improvement Improved effects
Large RADARLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42
Accuracy Day 1.70 2.40 2.94 3.40 3.80 4.16 4.50 4.81 5.10 5.38
Accuracy Night 1.60 2.26 2.77 3.20 3.58 3.92 4.23 4.53 4.80 5.06

(Very) Large Dual Purpose Radars (2- Acc)

Improvement Improved effects
Large RADARLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42
Accuracy Day 1.70 2.40 2.94 3.40 3.80 4.16 4.50 4.81 5.10 5.38
Accuracy Night 1.30 1.84 2.25 2.60 2.91 3.18 3.44 3.68 3.90 4.11

Small Dual Purpose / AA Radars (3+ Acc)

Improvement Improved effects
Small RADARSmall 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.25 1.76 2.16 2.50 2.79 3.06 3.30 3.53 3.75 3.95
Accuracy Day 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Night 1.60 2.26 2.77 3.20 3.58 3.92 4.23 4.53 4.80 5.06

Small Dual Purpose / AA Radars (2- Acc)

Improvement Improved effects
Small RADARSmall 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.25 1.76 2.16 2.50 2.79 3.06 3.30 3.53 3.75 3.95
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

Large AA Radars (2- Acc)

Improvement Improved effects
Large RADARLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42
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

Depth Charges & Hedgehog

Improvement Improved effects
Depth Charges 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.75 1.06 1.29 1.50 1.67 1.83 1.98 2.12 2.25 2.37
Anti-Submarine Warfare 0.67 0.94 1.15 1.33 1.49 1.63 1.76 1.89 2.00 2.11

Depth Charges Racks

Improvement Improved effects
Depth Charge RacksDCR 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Submarine Warfare 0.67 0.94 1.15 1.33 1.49 1.63 1.76 1.89 2.00 2.11

Sonars

Improvement Improved effects
SONAR 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 0.75 1.06 1.29 1.50 1.67 1.83 1.98 2.12 2.25 2.37
Anti-Submarine Warfare 0.67 0.94 1.15 1.33 1.49 1.63 1.76 1.89 2.00 2.11
Accuracy ASW 1.30 1.83 2.25 2.60 2.90 3.18 3.43 3.67 3.90 4.11
Evasion Torpedo 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74

Engine Improvements

Improvement Improved effects
Engine Improvement 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Evasion 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74

AP Shells

Improvement Improved effects
Armor-Piercing Shell 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

AA Shells

Improvement Improved effects
Anti-Aircraft Shell 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

Anti-Ground Rockets

Improvement Improved effects
Anti-Ground Rocket 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

Surface Ship Personnel

Improvement Improved effects
Lookout 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

Searchlights

Improvement Improved effects
Searchlight 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

Aviation Personnels

Improvement Improved effects
Aviation Personnel 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

Landing Craft

Improvement Improved effects
Landing Craft 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
Anti-Installation
Bonuses
A1 1 + (Average Improved /50)
C [1 + (Average Improved /50)]N
Expedition Bonus 1 + (Average Improved /100)
Has some observed bonus on some special Resource Nodes gains

Landing Craft Type 3

Improvement Improved effects
Landing Craft 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
Anti-Installation
Bonuses
A1 1 + (Average Improved /50)
C [1 + (Average Improved /50)]N

Amphibious Tanks

Improvement Improved effects
Amphibious Vehicle 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
Anti-Installation
Bonuses
A1 1 + (Average Improved /30)
C 1 + (Average Improved /30)
Expedition Bonus 1 + (Average Improved /100)
Has some observed bonus on some special Resource Nodes gains

Ka-Tsu Tanks

Improvement Improved effects
Amphibious Vehicle 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
Anti-Installation
Bonuses
A1 1 + (Average Improved /50)
C [1 + (Average Improved /50)]N
Expedition Bonus 1 + (Average Improved /100)
Has some observed bonus on some special Resource Nodes gains

Army Units

Improvement Improved effects
Landing Forces 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
Anti-Installation Bonus? Unknown

Submarine Torpedoes

Improvement Improved effects
Submarine TorpedoesSub 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Fighters

Improvement Improved effects
Fighter 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Night Fighters

Improvement Improved effects
Night Fighter 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Seaplane Fighters

Improvement Improved effects
Seaplane Fighter 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Land-Based Fighters 1

Improvement Improved effects
Land-based Fighter 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Land-Based Fighters 2

Improvement Improved effects
Land-based Fighter 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Fighter-Bombers

Improvement Improved effects
Dive Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50

Mod 64 Zero FB

Improvement Improved effects
Dive Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Dive Bombers

Improvement Improved effects
Dive Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Dive Bomber Attack 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Torpedo Bombers

Improvement Improved effects
Torpedo Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Night Torpedo Bombers

Improvement Improved effects
Night Torpedo Bomber 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Torpedo Attack 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Rotorcraft (ASW ≤ 10)

Improvement Improved effects
Rotorcraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
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

Rotorcraft (ASW ≥ 11)

Improvement Improved effects
Rotorcraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Submarine Warfare 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
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

Liaison Aircraft (ASW ≤ 7)

Improvement Improved effects
Liaison Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Submarine Warfare 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
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

Liaison Aircraft (ASW ≥ 8)

Improvement Improved effects
Liaison Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Submarine Warfare 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
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

Medium Extra Armors

Improvement Improved effects
Medium ArmorMedium 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Armor 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

Large Extra Armors

Improvement Improved effects
Large ArmorLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Armor 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0

Land-Based Recons

Improvement Improved effects
Land-based Reconnaissance AircraftLB 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight? 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

Submarine Equipment

Improvement Improved effects
Submarine Equipment 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Nothing

Command Facilities

Improvement Improved effects
Command Facility 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

Smoke Generator

Improvement Improved effects
Smoke Generator 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
Trigger rate Increased
Smoke level Increased

Rations

Improvement Improved effects
Ration 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Nothing

See Also