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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
Please contact this person before making any major (non-grammar, typo correction, redesigning etc.) edits on this article.


See also: Fit gun bonus - Reddit intermediate players' guide

Fit Bonus and Overweight PenaltyEdit

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]

BattleshipsEdit

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
30.5cm Triple Gun Mount 231 Card

30.5cmK
30.5cm Triple Gun Mount Kai 232 Card
35.6cm
35.6cm Twin Gun Mount 007 Card

P35.6cm
Prototype 35.6cm Triple Gun Mount 103 Card

Dazzle
35.6cm Twin Gun Mount (Dazzle Camouflage) 104 Card

38cmK
38cm Twin Gun Mount Kai 114 Card

38.1cm
38.1cm Mk.I Twin Gun Mount 190 Card

38.1cm/N
38.1cm Mk.I N Twin Gun Mount Kai 192 Card
38cm四
38cm Quadruple Gun Mount 245 Card

38cmK四
38cm Quadruple Gun Mount Kai 246 Card
381mm
381mm 50 Triple Gun Mount 133 Card

381mmK
381mm 50 Triple Gun Mount Kai 137 Card
41cm
41cm Twin Gun Mount 008 Card

P41cm
Prototype 41cm Triple Gun Mount 105 Card

41cmK
41cm Triple Gun Mount Kai 236 Card
16inch
16inch Triple Gun Mount Mk.7 161 Card

GFCS
16inch Triple Gun Mount Mk.7 + GFCS 183 Card
P46cm
Prototype 46cm Twin Gun Mount 117 Card
46cm
46cm Triple Gun Mount 009 Card
P51cm
Prototype 51cm Twin Gun Mount 128 Card
Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night
Kongou Class
FBB Kongou 078 Battle
FBB Hiei 086 Battle
FBB Kirishima 085 Battle
FBB Haruna 079 Battle
+7 0 -2 0 -5 -5 -7 -8 N/A
Bismarck Class
FBB Bismarck 171 Battle
+4 ?? +3 0 -5 -2? -2? -10 N/A
Гангут Class
FBB Gangut 511 Battle
+7 +4 0 0 0 -7 -7 -10 -16 N/A
Richelieu Class
FBB Richelieu 492 Battle
+4 +5 -2 0 -5 -7 -7 -10 N/A
Vittorio Veneto Class
FBB Littorio 441 Battle
FBB Roma 442 Battle
+4 ?? +1 0 -7 -5 -7 -10 N/A
Iowa Class
FBB Iowa 440 Battle
+4 ?? -2 0 -5 +4 -7 -10 N/A
Queen Elizabeth Class
BB Warspite 439 Battle
+4 ?? +2 0 +2 0 -3 -10 N/A
Ise Class (Base)
BB Ise 077 Battle
BB Hyuuga 087 Battle
+2 ?? +2 0 +2 +2 -3 -7 N/A
Fusou Class (Base)
BB Fusou 026 Battle
BB Yamashiro 027 Battle
+2 ?? +2 0 +2 +2 -3 -7 N/A
Ise Class (Kai)
BB Ise 077 Battle
BB Hyuuga 087 Battle
+4 -2 +2 0 +2 0 -3 -5 -7 -8 N/A
Fusou Class (Kai/Kai Ni)
BBV Fusou Kai 286 Battle
BBV Fusou Kai Ni 411 Battle
BBV Yamashiro Kai 287 Battle
BBV Yamashiro Kai Ni 412 Battle
+4 -2 +2 0 +2 0 -3 -5 -7 -8 N/A
Nagato Class (Base/Kai)
BB Nagato 080 Battle
BB Mutsu 081 Battle
+2 ?? +2 0 +2 +2 -3 -7 0
Nagato Class (Kai Ni)
BB Nagato Kai Ni 541 Battle
?? ?? ?? 0 +5 0 -3 -5 0
Yamato Class
BB Yamato 131 Battle
BB Musashi 143 Battle
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: November 7th 2017 Made by: Tsubakura

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

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

Where:

  • W is the resulting fit bonus or overweight penalty
  • C_{k} 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.
  • M_{k} 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.
  • N_{k} is the number of equipped guns for that gun class.

CruisersEdit

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 GreenGunDP12.7cm (LM)
12.7cm Twin High-angle Gun Mount (Late Model) 091 Card
RedGunMedium14cm Single
14cm Single Gun Mount 004 Card

YellowGun15.2cm
15.2cm Single Gun Mount 011 Card
RedGunMedium14cm Twin
14cm Twin Gun Mount 119 Card

RedGunMedium15.2cm
15.2cm Twin Gun Mount 065 Card

RedGunMedium15.2cmK
15.2cm Twin Gun Mount Kai 139 Card
RedGunMedium15.5cm
15.5cm Triple Gun Mount 005 Card

RedGunMedium15.5cmK
15.5cm Triple Gun Mount Kai 235 Card
RedGunMedium20.3cm
20.3cm Twin Gun Mount 006 Card
RedGunMedium20.3cm(2)
20.3cm (No.2) Twin Gun Mount 090 Card
RedGunMedium20.3cm(3)
20.3cm (No.3) Twin Gun Mount 050 Card
RedGunMedium203mm/53
203mm 53 Twin Gun Mount 162 Card
Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night
Ooyodo Class
CL Ooyodo 183 Battle
?? +??Icon Hit +1Icon Gun +5Icon Hit +2Icon Gun +7Icon Hit 0 0 0 0
Agano Class
CL Agano 137 Battle
CL Noshiro 138 Battle
CL Yahagi 139 Battle
CL Sakawa 140 Battle
?? +??Icon Hit +1Icon Gun +8?Icon Hit +2Icon Gun ?? 0 0 0 0
All other CL(T) ?? +4Icon Hit +1Icon Gun +3Icon Hit +2Icon Gun ?? 0 0 0 0
Mogami Class
CA Mogami 070 Battle
CA Mikuma 120 Battle
CA Suzuya 124 Battle
CA Kumano 125 Battle
0 0 0 +2Icon Hit 0 +10*Icon Hit 0 +12.5*Icon Hit 0 +15*Icon Hit 0
Mogami Class (K2)
CA Mogami 070 Battle
CA Mikuma 120 Battle
CA Suzuya 124 Battle
CA Kumano 125 Battle
0 0 0 +5Icon Hit 0
Zara Class
CA Zara 448 Battle
CA Pola 449 Battle
0 0 0 ?? +1Icon Hit +1Icon Gun
All other CA(V) 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 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.
  • With the exception of the 20.3cm series, 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!
  • The night bonus of the 20.3cm series are additive instead of being sqrted, the night bonus never exceeds 15%.
    • Whether the regular 20.3cm fit bonus still overrides the 20.3cm(3) is unknown, as it is seen to stack when it's mixed with a 20.3cm(2) instead.
    • The bonus for using 2x regular 20.3cm guns is unknown as well.
Last Updated: December 17th 2017 Made by: Tsubakura

Single Mount High-Angle BonusEdit

As of June 23, Yura and Mutsuki/Kamikaze-class destroyers gain fit bonuses from having single mount GreenGunDP equipped.

Ship GreenGunDP12.7cm Single HA Mount (Late Model)
12.7cm Single High-angle Gun Mount (Late Model) 229 Card
Satsuki K2
DD Satsuki Kai Ni 418 Battle
+5Icon Hit
Other Mutsuki-Class ??
Kamikaze-Class ??
Yura K2
CL Yura Kai Ni 488 Battle
+10Icon Hit

Unknown factors:

  • Only Yura K2
    CL Yura Kai Ni 488 Battle
    and Satsuki K2
    DD Satsuki Kai Ni 418 Battle
    were tested. It's unknown whether the other ships in the same class would receive the same bonus or whether it only works for specific remodels.
  • It has not been tested with multiple guns, it's unknown whether it works the same as the other fit mechanics.
  • It is unknown whether the 12.7cm Single Gun Mount gives a fit bonus or not.
Last Updated: November 7th 2017 Made by: Tsubakura

ReferencesEdit

  1. https://twitter.com/KanColle_STAFF/status/380246238991364096
  2. https://twitter.com/KanColle_STAFF/status/493648336142876674