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Cruiser Bonuses

Table Explainer

When equiping '"Medium Caliber Main Guns/Secondary Guns" on a CA/CAV/CL/CLT/CT/Aux, the resulting accuracy bonus/penalty is:

Fit Formula

[math]\displaystyle{ \text{ACC}_\text{bonus} = \sum^{\text{All Groups}} C_{Group} \times \sqrt{N_{Group}} \times M }[/math]

With
  • [math]\displaystyle{ \text{All Groups} }[/math] the gun groups and sub-groups defined in the following tables.
  • [math]\displaystyle{ C_{Group} }[/math] the accuracy modifier of the group, given in the following table.
    • When a ship has additional bonuses to a group compared to her type, this bonus is summed as a separate "Group".
  • [math]\displaystyle{ N_{Group} }[/math] the number of guns of a same group.
  • [math]\displaystyle{ M }[/math] the Marriage bonus of 0.6 when applicable, 1 else.
    • This bonus is applied only for Groups marked by footnote [1],
    • When applied, this bonus is applied in all situations, with penalties being reduced by 0.6, as well as bonuses being reduced by 0.6.

???Do note that speed modding ships (to Fast+) has been observed to worsen the penalties on certain ships.


Examples

Gun Groups

Medium Caliber Main Gun Medium Main High-Angle GunMedium Secondary Gun Medium Caliber Main Guns/Secondary Guns Groups
Gun Groups Guns
A A1
14 cm Single
IJN 14cm Single14cm Single Gun Mount
A2
14 cm Twin
IJN 14cm Twin14cm Twin Gun Mount
IJN 14cm Twin K14cm Twin Gun Mount Kai
B B1
15.2 cm
IJN 15.2cm Single Sec15.2cm Single Gun Mount
IJN 15.2cm Twin15.2cm Twin Gun Mount
IJN 15.2cm Twin K15.2cm Twin Gun Mount Kai
IJN 15.2cm Twin K215.2cm Twin Gun Mount Kai Ni
B3 Bofors 15.2cm Twin M1930Bofors 15.2cm Twin Gun Mount Model 1930
Bofors 15cm Twin Mk9 M1938Bofors 15cm Twin Rapid Fire Gun Mount Mk.9 Model 1938
Bofors 15cm Twin Mk9 K + Single Mk10 K M1938Bofors 15cm Twin Rapid Fire Gun Mount Mk.9 Kai + Single Rapid Fire Gun Mount Mk.10 Kai Model 1938
B3 RAN 6" Twin MkXXI6inch Twin Rapid Fire Gun Mount Mk.XXI
C IJN 15.5cm Triple15.5cm Triple Gun Mount
IJN 15.5cm Triple K15.5cm Triple Gun Mount Kai
D USN 6" Triple Mk166inch Triple Rapid Fire Gun Mount Mk.16
USN 6" Triple Mk16 mod26inch Triple Rapid Fire Gun Mount Mk.16 mod.2
RN 6" Triple MkXXIII6inch Mk.XXIII Triple Gun Mount

152 mm/55 Triple152mm/55 Triple Rapid Fire Gun Mount
152 mm/55 Triple Kai152mm/55 Triple Rapid Fire Gun Mount Kai

E 5" Twin CD5inch Twin Dual-purpose Gun Mount (Concentrated Deployment)
5" Twin CD + GFCSGFCS Mk.37 + 5inch Twin Dual-purpose Gun Mount (Concentrated Deployment)
F F1 IJN 20.3cm Twin20.3cm Twin Gun Mount
IJN 20.3cm N°2 Twin20.3cm (No.2) Twin Gun Mount
IJN 20.3cm N°3 Twin20.3cm (No.3) Twin Gun Mount
F2 KMS 20.3cm Twin SKC34SKC34 20.3cm Twin Gun Mount
F3 RM 203mm Twin203mm/53 Twin Gun Mount
G USN 8" Triple Mk98inch Triple Gun Mount Mk.9
USN 8" Triple Mk9 mod28inch Triple Gun Mount Mk.9 mod.2
Sec 15.5 cm Sec IJN 15.5cm Triple Sec15.5cm Triple Secondary Gun Mount
IJN 15.5cm Triple Sec K15.5cm Triple Secondary Gun Mount Kai
IJN 15.5cm Triple Sec K215.5cm Triple Secondary Gun Mount Kai Ni
Other Sec KMS 15cm Twin Sec15cm Twin Secondary Gun Mount
RM 152mm Triple OTO SecOTO 152mm Triple Rapid Fire Gun Mount
Fr 15.2cm Triple Sec15.2cm Triple Gun Mount
Notes
  • Future Medium Guns may fall in one of those categories based on similarities like caliber and number of guns.
  • Groups A, B, C, D, and E are "Light Cruiser Guns", and Groups F and G are "Heavy Cruiser Guns".

Light Cruisers (CL/CLT/CT)

Accuracy Accuracy bonuses for Light Cruisers (CL), Torpedo Cruisers (CLT), and Training Cruisers (CT).

Ships Guns group[1] Accuracy Accuracy bonus/penalty
1st Gun 2nd Gun Unmarried Married
Default to
every CL(T)/CT
- - 0 0
A/B A/B 0 2
C C -5? -1?
D D -6 -3.6
E E
F F
F - -3 -1.8
G G -22 -17.6
15.2cm Single Secondary15.2cm Single Gun Mount +4N ?
Agano-class B - 5 7
B B 6 8
F F -8 -6
Ooyodo C C -2 -1.2
F F -10 -8
Atlanta-class E E 0 3
Abyssals - - 0[2] -
Any Medium Gun - -3[3] -
  • There is not enough data to pin down the exact fit accuracy formula.
  • Other gun combinations fits cannot be extrapolated yet.
  • There are known tests where the fit bonuses do not scale linearly with the number of guns.


Firepower Firepower bonuses for Light Cruisers (CL), Torpedo Cruisers (CLT), and Training Cruisers (CT).

Ships Guns Firepower Firepower bonus
Default to
every CL(T)/CT
14cm Single14cm Single Gun Mount
15.2cm Single Secondary15.2cm Single Gun Mount
+1
14cm Twin /Kai14cm Twin Gun Mount
14cm Twin Gun Mount Kai
 · 15.2cm /Kai15.2cm Twin Gun Mount
15.2cm Twin Gun Mount Kai

Bofors 15.2cmBofors 15.2cm Twin Gun Mount Model 1930 · 6" Twin MkXXI6inch Twin Rapid Fire Gun Mount Mk.XXI

+2


Sources: [1] [2]

Heavy Cruisers (CA/CAV)

CA(V) as well as other "Medium Guns capable ships" are still under investigation, this information is outdated and may be erroneous.

Accuracy Accuracy bonuses for Heavy Cruisers (CA), Aviation Cruisers (CAV), as well as some other "Medium Guns capable ships" like Seaplane Tenders (AV), Kamoi (AO forms).

  • Other ships like Submarine Tenders (AS) are unmapped yet.
Ships 14cm Twin /Kai14cm Twin Gun Mount
14cm Twin Gun Mount Kai
15.2cm /Kai15.2cm Twin Gun Mount
15.2cm Twin Gun Mount Kai
C IJN 20.3cm20.3cm Twin Gun Mount
20.3cm (No.2) Twin Gun Mount
20.3cm (No.3) Twin Gun Mount
203mm/53203mm/53 Twin Gun Mount G
Day Night
CA(V) ? ? ? 0 +5 +5N? ? 0
Mogami-class ? ? +2 ?
Mogami-class Kai Ni ? ? +5 ?
Zara-class ? ? ? +1
AV/Kamoi (AO) -6N -6N ? -8 -10N ? -8 -10N?
  • The table shows an estimated accuracy and/or firepower fit bonus based on having one fit gun equipped.
    • The variable N refers to the number of guns of that category equipped
    • E.g. 2 guns of 2N = 4 Acc
  • Bonuses from guns of different classes are simply added together.
  • The night fit bonus from the IJN 20.3cm series used to be capped at +15%. However, it is unknown whether this cap has been removed or not from the recent updates.
    • It is possible that certain fit categories only work during the day, but there is no concrete data proving it yet.
    • It is alternatively possible that the night bonus from the IJN 20.3cm series overrides any other categories.
    • Such fit mechanics do not apply to abyssals.[1]
  • As of 13th December 2018 the hidden firepower bonus of 14cm Twin Gun Mount Kai14cm Twin Gun Mount Kai does not work/does not exist[citation needed].


Firepower Firepower bonuses for Heavy Cruisers (CA), Aviation Cruisers (CAV), as well as some other "Medium Guns capable ships" like Seaplane Tenders (AV), Kamoi (AO forms).

  • Other ships like Submarine Tenders (AS) are unmapped yet.
Ships 203mm/53203mm/53 Twin Gun Mount
Zara-class +1

Sources: [3] [4]