Combat/Overweight Penalty and Fit Gun Bonus

This article is Overweight Penalty/Fit Gun Bonus
The article is already being adopted and currently under renovation.

Missing Information: Fit Gun table for BB, updated information and sources, quantified effects

Page Adopted By: Tsubakura
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Fit Bonus and Overweight Penalty

With the introduction of fit gun mechanics on July 28th 2014, ships now will receive fit bonus/penalties depending if the equipped gun fits for the class or if the gun is too heavy for the ship to use.

As fit bonuses are unaffected by morale or combined fleets, it becomes important that you utilize the fit bonuses as much as possible.

Fit mechanics do not apply to the abyssal fleet.^[1]

Battleships

Battleships receives accuracy bonuses if the guns are fit and accuracy penalties if its overweight.^[2] How much bonus/penalty a ship receives, depends on the battleship class, the caliber and type of the gun and whether the battle takes place during day or night.

Note: The gun classification is only there as a reference for editors and does not reflect the terminologies used in-game.

Gun Class	Class A				Class F		Class B		Class C		Class Y		Class D		Class E		Class Z
Ship Class	30.5cm 30.5cmK		35.6cm P35.6cm Dazzle 38cmK 38.1cm 38.1cm/N		38cm四 38cmK四?		381mm 381mmK		41cm P41cm 41cmK		16inch GFCS		P46cm		46cm		P51cm
Ship Class	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night
Kongou Class	+7				-2		-2	0	-5		-5		-7		-10		N/A
Bismarck Class	+4				??		+3	0	-5		-2?		-2?		-10		N/A
Гангут ClassГангут	+10		+7		??		+1	0	-7		-7		-10		-16		N/A
Richelieu Class	+4				+4		-2	0	-7		-7		-7		-10		N/A
Vittorio Veneto Class	+4				??		+1	0	-7		-5		-7		-10		N/A
Iowa Class	+4				??		-2	0	-5		+4		-7		-10		N/A
Queen Elizabeth Class	+4				??		+2	0	+2		0		-3		-10		N/A
Ise Class (Base)	+2				??		+2	0	+2		+2		-3		-7		N/A
Fusou Class (Base)	+2				??		+2	0	+2		+2		-3		-7		N/A
Ise Class (Kai)	+4				??		+2	0	+2		0		-3	-5	-7	-8	N/A
Fusou Class (Kai/Kai Ni)	+4				??		+2	0	+2		0		-3	-5	-7	-8	N/A
Nagato Class (Base/Kai)	+2				??		+2	0	+2		+2		-3		-7		0
Nagato Class (Kai Ni)	??				??		??	0	+5		0		-3		-5		0
Yamato Class	0				0		0		0		0		0		0		0
Note: Fit gun mechanics are still being investigated to this day, hence the values are not final and may be subject to changes. Values with a question mark either means that its not conclusive yet or the conclusion drawn here is not the same as the one drawn by yumeji. The table shows an estimated accuracy fit bonus based on having one fit gun equipped. For married ships, the overweight penalty is reduced by 40% (A married Kongou with a 46cm receives a penalty of -6 instead of -10, for example). If more than one gun of the same class is used, multiply the modifier by the square root of number of guns. (A Kongou-class with two A class guns equipped for example, that's √2 x 7 = 9.89) If guns from different classes are used together, add the modifiers together. (A Kongou with a 35.6cm and 41cm mixed for example, that's 7 - 5 = 2. Exceptions arises where different guns of the same class gives different bonuses on certain ships, notably Gangut. What would happen if you combine 30.5cm and 35.6cm is still under investigations.
Last Updated: October 13th 2017	Made by: Tsubakura

More generally, the accuracy offset can be defined with the formula:

[math]\displaystyle{ W = \sum^{\text{All Classes}} \left ( C_{k} M_{k} \sqrt{N_{k}} \right ) \% }[/math]

Where:

[math]\displaystyle{ W }[/math] is the resulting fit bonus or overweight penalty
[math]\displaystyle{ C_{k} }[/math] is the main coefficient of the equipped gun class. Refer to the above table for the coefficients applied to each Battleship for their respective guns.
[math]\displaystyle{ M_{k} }[/math] is the marriage coefficient for the particular gun class. Assumes a value of 0.6 if the ship is married, and if the main coefficient is negative.
[math]\displaystyle{ N_{k} }[/math] is the number of equipped guns for that gun class.

Cruisers

Cruisers can receive accuracy and/or firepower bonuses from using fit guns in their load-out. Unlike battleships however, cruisers do not suffer from any overweight penalty nor do overweight guns for cruisers exists.

Ship Class	14cm Single 15.2cm		14cm Twin 15.2cm 15.2cmK		15.5cm		15.5cmK		20.3cm		20.3cm(2)		20.3cm(3)		203mm/53
Ship Class	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night	Day	Night
Ooyodo Class	+4?? +1??		+5 +2??		+7		??		0		0		0		0
Agano Class			+8 +2??		??		??		0		0		0		0
All other CL(T)			+3?? +2??		??		??		0		0		0		0
Mogami Class	0		0		+2		+5		0	+10*	0	+10*	0	+15*	0
Zara Class	0		0		??		??								+1 +1
All other CA(V)	0		0		??		??								0
Note: Fit gun mechanics are still being investigated to this day, hence the values are not final and may be subject to changes. Values with a question mark means that it is potentially outdated and might no longer be correct. The table is populated with data after the June 2017 cruiser fit gun overhaul. Values concluded from old data are marked with a question mark. The table shows an estimated accuracy and/or firepower fit bonus based on having one fit gun equipped. Bonuses from guns of different classes are simply added together. If more than one gun of the same class is used, multiply the modifier by the square root of number of guns (Ooyodo with two 15.5cm guns equipped for example, that's √2 x 7 = 9.89). Note that this also applies to firepower bonuses! Bolded out values are exceptions as they give an one-time flat bonus instead and this bonus will not increase with the amount of guns you have equipped. The 20.3cm bonus will override the 20.3cm(3) bonus if both guns are present on a ship. It is unknown if the 20.3cm(2) also overrides the 20.3cm(3) bonus.
Last Updated: November 4th 2017	Made by: Tsubakura