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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.

Ship Class 30.5cm30.5cm Triple Gun Mount 231 Card
30.5cmK30.5cm Triple Gun Mount Kai 232 Card
35.6cm35.6cm Twin Gun Mount 007 Card
P35.6cmPrototype 35.6cm Triple Gun Mount 103 Card
Dazzle35.6cm Twin Gun Mount (Dazzle Camouflage) 104 Card
38cmK38cm Twin Gun Mount Kai 114 Card
38.1cm38.1cm Mk.I Twin Gun Mount 190 Card
38.1cm/N38.1cm 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
381mm381mm 50 Triple Gun Mount 133 Card
381mmK381mm 50 Triple Gun Mount Kai 137 Card
41cm41cm Twin Gun Mount 008 Card
P41cmPrototype 41cm Triple Gun Mount 105 Card
41cmK41cm Triple Gun Mount Kai 236 Card
16inch16inch Triple Gun Mount Mk.7 161 Card
GFCS16inch Triple Gun Mount Mk.7 + GFCS 183 Card
P46cmPrototype 46cm Twin Gun Mount 117 Card 46cm46cm Triple Gun Mount 009 Card 46cmK46cm Triple Gun Mount Kai 276 Card P51cmPrototype 51cm Twin Gun Mount 128 Card
51cm51cm Twin Gun Mount 281 Card
Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night Day Night
Kongou ClassKongou Banner
Hiei Banner
Kirishima Banner
Haruna Banner
+7 0 -2 0 -5 -5 -7 -8 -9 N/A
Bismarck ClassBismarck Banner +4 ?? +3 0 -5 -2? -2? -10 ? N/A
Гангут ClassГангут +7 +4 0 0 0 -7 -7 -10 -16 ? N/A
Richelieu ClassRichelieu Banner +4 +5 -2 0 -5 -7 -7 -10 ? N/A
Vittorio Veneto ClassLittorio Banner
Roma Banner
+4 ?? +2 0 -7 -5 -10 -10 ? N/A
Iowa ClassIowa Banner +4 ?? -2 0 -5 +4 -7 -10 ? N/A
Queen Elizabeth ClassWarspite Banner +4 ?? +2 0 +2 0 -3 -10 ? N/A
Ise Class (Base)Ise Banner
Hyuuga Banner
+2 ?? +2 0 +2 +2 -3 -7 ? N/A
Fusou Class (Base)Fusou Banner
Yamashiro Banner
+2 ?? +2 0 +2 +2 -3 -7 ? N/A
Ise Class (Kai)Ise Banner
Hyuuga Banner
+4 -2 +2 0 +2 0 -3 -5 -7 -8 -5 N/A
Fusou Class (Kai/Kai Ni)Fusou Kai Banner
Fusou Kai Ni Banner
Yamashiro Kai Banner
Yamashiro Kai Ni Banner
+4 -2 +2 0 +2 0 -3 -5 -7 -8 -5 N/A
Nagato Class (Base/Kai)Nagato Banner
Mutsu Banner
+2 ?? +2 0 +2 +2 -3 -7 ? 0
Nagato Class (Kai Ni)Nagato Kai Ni Banner ?? ?? ?? 0 +5 0 -3 -5 -5 0
Yamato ClassYamato Banner
Musashi Banner
0 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: April 29th 2018 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.

Ship Class GreenGunDP12.7cm Twin (LM)12.7cm Twin High-angle Gun Mount (Late Model) 091 Card RedGunMedium14cm Single14cm Single Gun Mount 004 Card
 

YellowGun15.2cm15.2cm Single Gun Mount 011 Card

RedGunMedium14cm Twin14cm Twin Gun Mount 119 Card
 

RedGunMedium14cm Twin Kai14cm Twin Gun Mount Kai 310 Card
RedGunMedium15.2cm15.2cm Twin Gun Mount 065 Card
RedGunMedium15.2cmK15.2cm Twin Gun Mount Kai 139 Card

RedGunMediumBofors 15.2cmBofors 15.2cm Twin Gun Mount Model 1930 303 Card RedGunMedium15.5cm15.5cm Triple Gun Mount 005 Card
 

RedGunMedium15.5cmK15.5cm Triple Gun Mount Kai 235 Card

RedGunMedium20.3cm20.3cm 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/53203mm 53 Twin Gun Mount 162 Card
Day Night Day Night Day Night Day Night Day Night Day Night Day Night
Ooyodo ClassOoyodo Banner +2 +2NIcon Hit +4NIcon Hit +1Icon Gun +2Icon Hit +2Icon Gun  ?? +2Icon Hit -2 -2NIcon Hit 0
Agano ClassAgano Banner
Noshiro Banner
Yahagi Banner
Sakawa Banner
+2 +2NIcon Hit +4NIcon Hit +1Icon Gun +5 +2NIcon Hit +2Icon Gun  ?? -2 -2NIcon Hit -2 -2NIcon Hit 0
All other CL(T) +2 +2NIcon Hit +4NIcon Hit +1Icon Gun +2Icon Hit +2Icon Gun +3Icon Hit ??Icon Gun -2 -2NIcon Hit -2 -2NIcon Hit -2 -2.5N??Icon Hit
Mogami ClassMogami Banner
Mikuma Banner
Suzuya Banner
Kumano Banner
0 0 0 0 +2Icon Hit 0 +10*Icon Hit 0
Mogami Class (K2)Suzuya Kai Ni Banner
Kumano Kai Ni Banner
0 0 0 0 +5Icon Hit 0
Zara ClassZara Banner
Pola Banner
0 0 0 0 ?? +1Icon Hit +1Icon Gun
All other CA(V) 0 0 0 0 ?? 0
Seaplane Tenders (AV) ?? ?? -2??Icon Hit 0 -4 -10NIcon Hit -4 -10NIcon Hit ??

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 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. (Ex: 2 guns of 2N = 4 ACC)
  • Bonuses from guns of different classes are simply added together.
  • The night fit bonus from the 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.
  • There is a possibility that certain fit categories only work during the day. The possibility is plausible, but there's no concrete data proving. The alternative theory is that the night bonus from the 20.3cm series overrides any other categories.
  • The information in this table is sourced from this spreadsheet maintained by Dewy with the relevant sources linked in the spreadsheet.
  • As of 13th December the hidden firepower bonus of 14cm Twin Gun Mount Kai14cm Twin Gun Mount Kai 310 Card does not work/does not exist.
Last Updated: December 7th 2018 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 K2Satsuki Kai Ni Banner +5Icon Hit
Other Mutsuki-classMutsuki BannerKisaragi Banner
Yayoi BannerUzuki Banner
Minazuki BannerFumizuki Banner
Nagatsuki BannerKikuzuki Banner
Mikazuki BannerMochizuki Banner
??
Kamikaze-classKamikaze Banner
Asakaze Banner
Harukaze Banner
Matsukaze Banner
Hatakaze Banner
??
Yura K2Yura Kai Ni Banner +4 +10NIcon Hit
Light Cruisers (CL) +4NIcon Hit

Unknown factors:

  • Only Yura K2Yura Kai Ni Banner and Satsuki K2Satsuki Kai Ni Banner 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.
  • The variable N refers to the number of guns of that category equipped. (Ex: 2 guns of 2N = 4 ACC)
  • 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