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 Medium Caliber Main Guns/Secondary Guns Groups
Gun Groups		Guns
A IJN 14 cm	A1 IJN 14 cm Single	IJN 14cm Single
A IJN 14 cm	A2 IJN 14 cm Twin	IJN 14cm Twin IJN 14cm Twin K
B 15.2 cm	B1 IJN 15.2 cm Twin	IJN 15.2cm Twin IJN 15.2cm Twin K IJN 15.2cm Twin K2
	B2 Bofors 15.2 cm Twin	Bofors 15.2cm Twin M1930 Bofors 15cm Twin Mk9 M1938 Bofors 15cm Twin Mk9 K + Single Mk10 K M1938
	B3 RAN 15.2 cm Twin	RAN 6" Twin MkXXI
C IJN 15.5 cm Triple		IJN 15.5cm Triple IJN 15.5cm Triple K
D 15.2 cm Triple		USN 6" Triple Mk16 USN 6" Triple Mk16 mod2 RN 6" Triple MkXXIII RM 152mm Triple RM 152mm Triple K
E Main Medium HA		USN 5" Twin CD USN 5" Twin CD + GFCS
F 20.3 cm Twin	F1 IJN 20.3 cm Twin	IJN 20.3cm Twin IJN 20.3cm N°2 Twin IJN 20.3cm N°3 Twin
	F2 KMS 20.3 cm Twin	KMS 20.3cm Twin SKC34
	F3 RM 20.3 cm Twin	RM 203mm Twin
G 20.3 cm Triple		USN 8" Triple Mk9 USN 8" Triple Mk9 mod2
Sec	15.2 cm Sec	IJN 15.2cm Single Sec
	15.5 cm Sec	IJN 15.5cm Triple Sec IJN 15.5cm Triple Sec K IJN 15.5cm Triple Sec K2
	Other Sec	KMS 15cm Twin Sec RM 152mm Triple OTO Sec Fr 15.2cm Triple Sec

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".

Table

Type	Class	Ship	A IJN 14 cm		B 15.2 cm			C IJN 15.5 cm Triple	D 15.2 cm Triple	E Main Medium HA	F 20.3 cm Twin				G 20.3 cm Triple	Secondary
Type	Class	Ship	A1 IJN 14 cm Single	A2 IJN 14 cm Twin	B1 IJN 15.2 cm Twin	B2 Bofors 15.2 cm Twin	B3 RAN 15.2 cm Twin	C IJN 15.5 cm Triple	D 15.2 cm Triple	E Main Medium HA	F1 IJN 20.3 cm Twin Day	F1 IJN 20.3 cm Twin Night	F2 KMS 20.3 cm Twin	F3 RM 20.3 cm Twin	G 20.3 cm Triple	15.2 cm Sec	15.5 cm Sec	Other Sec

CL/CLT/CT Base Bonus			1		1			-3	-4	-4	-3				-14	4	0	0
CL/CLT/CT Additional Bonuses	Tenryuu Class‎	-
	Kuma Class‎ CL	-
	Kuma Class‎ CLT	-
	Nagara Class‎	-
	Sendai Class	-
	Yuubari Class‎	-
	Ooyodo Class‎	-						-1			-3
	Agano Class‎	-			4						-2
	Katori Class‎ CT	-
	Duca degli Abruzzi Class‎	-
	Atlanta Class‎	-								5
	Brooklyn Class‎	-
	St. Louis Class‎	-
	Town Class‎	-
	Perth Class‎	-
	Gotland Class‎	-
	De Ruyter Class‎	-

CA/CAV Base Bonus			0		0			0	0	0	0	5	0	0	0	0	0	0
CA/CAV Additional Bonuses	Furutaka Class‎	-
	Aoba Class‎	-
	Mogami Class‎ CA	-						2
	Mogami Class‎ CAV	-						2
	Mogami Class‎ CAV	Kai Ni						5
	Myoukou Class‎	-
	Takao Class‎	-
	Tone Class‎ CA	-
	Tone Class‎ CAV	-
	Zara Class	-												1
	Admiral Hipper Class‎	-
	Northampton Class‎	-													1?
	New Orleans Class‎	-

Auxiliary (AV/AS/AO) Base Bonus			-6		-6							-18			-18	0	0	0
Auxiliary (AV/AS/AO)Additional Bonuses	Chitose Class‎ AV	-
	Mizuho Class‎ AV	-
	Nisshin Class‎ AV	-		6?
	Kamoi Class AV	-
	Commandant Teste Class‎ AV	-		6?
	Taigei Class‎ AS	-
	Jingei Class‎ AS	-		6?
	Kamoi Class‎ AO	Kai		6?
	Yamashio Maru AO	Kai

Light Cruisers (CL/CLT/CT)

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

Ships	Guns group^[1]		Accuracy bonus/penalty
Ships	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 Secondary		+4N	?
Agano-class	B	-	5	7
	B	B	6	8
	F	F	-8	-6
Ooyodo	C	C	-2	-1.2
Ooyodo	F	F	-10	-8
Atlanta-class	E	E	0	3
Abyssals	-	-	0^[2]	-
Abyssals	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.

↑ Changing gun order does not affect the final bonus
↑ Light Cruiser Tsu-Class
↑ Light Cruiser Ho-Class, Light Cruiser He-Class, Light Cruiser To-Class, Torpedo Cruiser Chi-Class

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

Ships	Guns	Firepower bonus
Default to every CL(T)/CT	14cm Single 15.2cm Single Secondary	+1
Default to every CL(T)/CT	14cm Twin /Kai · 15.2cm /Kai Bofors 15.2cm · 6" Twin MkXXI	+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 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 /Kai	15.2cm /Kai	C	IJN 20.3cm		203mm/53	G
Ships	14cm Twin /Kai	15.2cm /Kai	C	Day	Night	203mm/53	G
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 Kai does not work/does not exist^{[citation needed]}.

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/53
Zara-class	+1

↑ https://twitter.com/KanColle_STAFF/status/380246238991364096

Sources: [3] [4]

[1] Changing gun order does not affect the final bonus

[2] Light Cruiser Tsu-Class

[3] Light Cruiser Ho-Class, Light Cruiser He-Class, Light Cruiser To-Class, Torpedo Cruiser Chi-Class

[4] ttps://twitter.com/KanColle_STAFF/status/380246238991364096

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[2]

[3]

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User:Jigaraphale/Sandbox/10

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