The tables below are the total bonus you get towards a particular stat when you have multiple equipment providing a bonus. The tables are based on the following optimized upgrade combinations:
Total ★
11
12
13
14
15
16
17
18
19
20
Equipment
5/6
6/6
6/7
7/7
7/8
8/8
8/9
9/9
9/10
10/10
Total ★
21
22
23
24
25
26
27
28
29
30
Equipment
7/7/7
7/7/8
7/8/8
8/8/8
8/8/9
8/9/9
9/9/9
9/9/10
9/10/10
10/10/10
Total ★
31
32
33
34
35
36
37
38
39
40
Equipment
7/8/8/8
8/8/8/8
8/8/8/9
8/8/9/9
8/9/9/9
9/9/9/9
9/9/9/10
9/9/10/10
9/10/10/10
10/10/10/10
It is important to note that while whole number breakpoints are important, fractions should not be discounted as they can be multiplied by various formulas to hit the next whole number. Therefore, you should aim to maximize your available improvement bonus.
0.66 Modifier
ASW from SONARs and DCs.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
0.66
0.94
1.15
1.33
1.49
1.63
1.76
1.88
2.00
2.10
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
3.12
3.26
3.39
3.52
3.64
3.77
3.88
4.00
4.10
4.21
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
5.29
5.41
5.53
5.65
5.77
5.88
6.00
6.10
6.21
6.32
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
7.42
7.54
7.65
7.77
7.88
8.00
8.10
8.21
8.32
8.43
0.7 Modifier
Anti-Air from HA Guns, MG, and AAFD,
Torpedo from Land Based Bombers.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
0.70
0.98
1.21
1.40
1.56
1.71
1.85
1.97
2.10
2.21
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
3.21
3.42
3.56
3.70
3.83
3.95
4.07
4.20
4.31
4.42
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
5.55
5.68
5.81
5.93
6.05
6.17
6.30
6.41
6.52
6.64
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
7.79
7.91
8.03
8.15
8.27
8.40
8.51
8.62
8.74
8.85
0.75 Modifier
Firepower from SONARs and DCs.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
0.75
1.06
1.29
1.50
1.67
1.83
1.98
2.12
2.25
2.37
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
3.51
3.67
3.82
3.96
4.10
4.24
4.37
4.50
4.62
4.74
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
5.95
6.08
6.22
6.36
6.49
6.62
6.75
6.87
6.99
7.11
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
8.34
8.48
8.61
8.74
8.87
9.00
9.12
9.24
9.36
9.48
1.0 Modifier
Firepower from small and medium guns, 15.2 cm Single, OTO, 90 mm Single HA, MG, AAFD, shells, landing craft, amphibious tanks, searchlights, anti-ground rockets, and lookouts.
Night Battle Power from small, medium, and large guns, 15.2 cm Single, OTO, 90 mm Single HA, AAFD, torpedoes, midget submarines, shells, landing craft, amphibious tanks, searchlights, anti-ground rockets, and lookouts.
Shelling Accuracy from small, medium, large, and secondary guns, AAFD, air radars, small dual-purpose radars, liaison aircraft, and shells.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
1.00
1.41
1.73
2.00
2.23
2.44
2.64
2.82
3.00
3.16
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
4.68
4.89
5.09
5.29
5.47
5.65
5.82
6.00
6.16
6.32
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
7.93
8.11
8.30
8.48
8.65
8.82
9.00
9.16
9.32
9.48
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
11.13
11.31
11.48
11.65
11.82
12.00
12.16
12.32
12.48
12.64
1.2 Modifier
Torpedo power from MG and torpedoes.
Line of Sight from carrier-based recons and seaplanes recons.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
1.20
1.69
2.07
2.40
2.68
2.93
3.17
3.39
3.60
3.79
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
5.62
5.87
6.11
6.34
6.56
6.78
6.99
7.20
7.39
7.58
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
9.52
9.74
9.96
10.18
10.38
10.59
10.80
10.99
11.18
11.38
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
13.35
13.57
13.78
13.98
14.19
14.40
14.59
14.78
14.98
15.17
1.25 Modifier
Line of Sight from small surface and dual-purpose radars.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
1.25
1.76
2.16
2.50
2.79
3.06
3.30
3.53
3.75
3.95
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
5.85
6.12
6.36
6.61
6.84
7.07
7.28
7.50
7.70
7.90
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
9.92
10.14
10.37
10.60
10.82
11.03
11.25
11.45
11.65
11.85
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
13.91
14.14
14.35
14.57
14.78
15.00
15.20
15.40
15.60
15.81
1.3 Modifier
ASW Accuracy from SONARs.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
1.30
1.83
2.25
2.60
2.90
3.18
3.43
3.67
3.90
4.11
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
6.09
6.36
6.62
6.87
7.11
7.35
7.57
7.80
8.01
8.22
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
10.31
10.55
10.79
11.03
11.25
11.47
11.70
11.991
12.12
12.33
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
14.47
14.70
14.93
15.15
15.37
15.60
15.81
16.02
16.23
16.44
1.4 Modifier
Line of Sight from large radars.
1.5 Modifier
Firepower from large caliber main guns.
Fleet Anti-Air from air and dual-purpose radars.
Torpedo evasion from sonars.
Evasion from engines.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
1.50
2.12
2.59
3.00
3.35
3.67
3.96
4.24
4.50
4.74
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
7.02
7.34
7.64
7.93
8.21
8.48
8.74
9.00
9.24
9.48
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
11.90
12.17
12.45
12.72
12.98
13.24
13.50
13.74
13.98
14.23
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
16.69
16.97
17.22
17.48
17.74
18.00
18.24
18.48
18.73
18.97
2.0 Modifier
Torpedo accuracy from MG and torpedoes.
Fleet Anti-Air from AAFD.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
2.00
2.82
3.46
4.00
4.47
4.89
5.29
5.65
6.00
6.32
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
9.37
9.79
10.19
10.58
10.94
11.31
11.65
12.00
12.32
12.64
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
15.87
16.23
16.60
16.97
17.31
17.65
18.00
18.32
18.64
18.97
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
22.26
22.62
22.97
23.31
23.65
24.00
24.32
24.64
24.97
25.29
3.0 Modifier
Fleet Anti-Air from high-angle guns.
Total ★
1
2
3
4
5
6
7
8
9
10
Bonus
3.00
4.24
5.19
6.00
6.70
7.34
7.93
8.48
9.00
9.48
Total ★
11
12
13
14
15
16
17
18
19
20
Bonus
14.05
14.69
15.28
15.87
16.42
16.97
17.48
18.00
18.48
18.97
Total ★
21
22
23
24
25
26
27
28
29
30
Bonus
23.81
24.35
24.90
25.45
25.97
26.48
27.00
27.48
27.97
28.46
Total ★
31
32
33
34
35
36
37
38
39
40
Bonus
33.39
33.94
34.45
34.97
35.48
36.00
36.48
36.97
37.46
37.94
1.0+1.5 Modifier
Bonus Firepower for Battleships with 2 main guns and 1 AP. Highlights indicate threshold changes.
from SONARs and DCs.
from HA Guns, MG, and AAFD,
from Land Based Bombers.
from SONARs and DCs.
, OTO
, 90 mm Single HA
, MG, AAFD, shells, landing craft, amphibious tanks, searchlights, anti-ground rockets, and lookouts.
from small, medium, and large guns, 15.2 cm Single
from small, medium, large, and secondary guns, AAFD, air radars, small dual-purpose radars, liaison aircraft, and shells.
from carrier-based recons and seaplanes recons.
from sonars.