Construction

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Construction Menu as shown
Large Ship Construction Menu as shown

Construction is accessible from the Arsenal menu and allows building new ship girls. Note that not all ships are available from construction, some being drops from normal maps, and others event exclusive (see below for details).

Constructing a girl costs a selectable amount of the 4 main Resources as well as "development materials" Development material. It will also take a variable amount of time unless instant constructions Instant construction Material are used.

  • Every player starts off with only 2 construction slots. Up to 2 more slots can be unlocked by using a Dock Opening Key for each.

Construction Types

Two types of ship construction are possible, "Normal Construction" and "Large Ship Construction" (LSC), the former being the most used and cheaper one, and the later being the most expensive with the greatest results.

Normal Construction

"Normal Construction" is the basic construction method. Recipes range from 30-999 fuel  , ammo  , steel   and bauxite   and each attempt costs 1 development material  . Speeding up construction costs 1 instant construction  .

  • If applicable, it is often more resource efficient to find a desired ship in sorties as a drop rather than building them.

Construction Theory

In normal construction, there are 4 pools determining the ship being crafted. Each group has exactly 100 unique ships and the available pools remain the same regardless of which Secretary used (excepted for the Z1-class). The selection of a pool is based on the resource input during the construction:

  • Pool 1 - 300+  , 400+  , 300+  ,
  • Pool 2 - 400+  , 600+  ,
  • Pool 3 - 250+  , 200+  ,
  • Pool 4 - Do not meet any of the above requirements.
  • Note: The check is done from top to bottom, if the requirements of multiple pools are fulfilled, only the topmost one is used.

The constructed ship is selected in the pool by a value called "[math]\displaystyle{ ID }[/math]" which can go from 1 to 100, calculated by substating two random values:

[math]\displaystyle{ ID }[/math] Calculation
[math]\displaystyle{ ID = Rand [0 ; 100] - Rand [0 ; Res - 1] }[/math]
With
  • [math]\displaystyle{ Rand }[/math] the function returning a random whole number between its boundaries, included,
  • [math]\displaystyle{ Res }[/math] a whole number that is incremented by having low/high resource inputs of certain types, defined below,
    • The resources used to increment this value depend on the pool that has been selected.

In case [math]\displaystyle{ ID }[/math] is 0 or negative, the value will be converted back into a positive value and incremented by 2.

Which resources that are used to increment value [math]\displaystyle{ Res }[/math] is dependent on the pool that has been selected:

[math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Steel-400}{25} \Bigg\rceil + \Bigg\lceil \frac{Baux-300}{20} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
[math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Ammo-400}{25} \Bigg\rceil + \Bigg\lceil \frac{Steel-600}{30} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
[math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Ammo-200}{13} \Bigg\rceil + \Bigg\lceil \frac{Steel-200}{20} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
[math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Fuel-100}{10} \Bigg\rceil + \Bigg\lceil \frac{Steel-30}{15} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]

Source: [1]

Pratical Conclusion
  • Only 2 resources will have an effect depending on the pool. Changing the two others will have no effect as long as it does not change the pool.
  • Of the two resources that have an effect, one has a bigger effect than the other.
    • The effect is capped, above a certain threshold increasing the resources further will not have any effect.
  • The effect of changing resources will increase the drop of some ships by reducing the drop of others.
  • The direct conseqence of the round-up is that the effect of resources work by steps starting form the minimum recipe plus one.
    • Increasing the resource of a recipe by a amount inferior to the step have no effect.
    • The steps are as follow:
      • Pool 1: 25  , 20  
      • Pool 2: 25  , 30  
      • Pool 3: 13  , 20  
      • Pool 4: 10  , 15  


Construction Pools
Construction Pools List
Ship Name Type Pool 4
"Light"
Pool 3
"Special"
Pool 2
"Heavy"
Pool 1
"Aviation"
  Mutsuki DD ✔️
  Kisaragi DD ✔️
  Satsuki DD ✔️
  Fumizuki DD ✔️
  Nagatsuki DD ✔️
  Kikuzuki DD ✔️
  Mikazuki DD ✔️
  Mochizuki DD ✔️
  Yayoi DD ✔️
  Fubuki DD ✔️ ✔️
  Shirayuki DD ✔️ ✔️
  Hatsuyuki DD ✔️ ✔️
  Miyuki DD ✔️ ✔️
  Murakumo DD ✔️ ✔️
  Isonami DD ✔️ ✔️
  Ayanami DD ✔️ ✔️
  Shikinami DD ✔️ ✔️
  Oboro DD ✔️
  Akebono DD ✔️
  Sazanami DD ✔️
  Ushio DD ✔️
  Akatsuki DD ✔️ ✔️
  Hibiki DD ✔️ ✔️
  Ikazuchi DD ✔️ ✔️
  Inazuma DD ✔️ ✔️
  Hatsuharu DD ✔️ ✔️
  Nenohi DD ✔️
  Wakaba DD ✔️
  Hatsushimo DD ✔️
  Shiratsuyu DD ✔️ ✔️
  Shigure DD ✔️ ✔️
  Murasame DD ✔️
  Yuudachi DD ✔️
  Samidare DD ✔️
  Suzukaze DD ✔️ ✔️
  Asashio DD ✔️
  Ooshio DD ✔️
  Michishio DD ✔️
  Arashio DD ✔️
  Arare DD ✔️
  Kasumi DD ✔️
  Kagerou DD ✔️ ✔️
  Shiranui DD ✔️ ✔️
  Kuroshio DD ✔️
  Akigumo DD ✔️ ✔️
  Yukikaze DD ✔️
  Shimakaze DD ✔️
  Z1 DD ✔️
  Z3 DD ✔️
  Tenryuu CL ✔️ ✔️
  Tatsuta CL ✔️ ✔️
  Kuma CL ✔️ ✔️ ✔️ ✔️
  Tama CL ✔️ ✔️ ✔️ ✔️
  Kitakami CL ✔️ ✔️ ✔️ ✔️
  Ooi CL ✔️
  Kiso CL ✔️ ✔️ ✔️ ✔️
  Nagara CL ✔️ ✔️ ✔️ ✔️
  Isuzu CL ✔️ ✔️ ✔️ ✔️
  Natori CL ✔️ ✔️ ✔️ ✔️
  Yura CL ✔️ ✔️ ✔️
  Kinu CL ✔️ ✔️
  Abukuma CL ✔️ ✔️
  Sendai CL ✔️ ✔️ ✔️ ✔️
  Jintsuu CL ✔️ ✔️ ✔️ ✔️
  Naka CL ✔️ ✔️ ✔️ ✔️
  Yuubari CL ✔️ ✔️
  Katori CT ✔️
  Furutaka CA ✔️ ✔️
  Kako CA ✔️ ✔️ ✔️
  Aoba CA ✔️ ✔️
  Kinugasa CA ✔️ ✔️
  Myoukou CA ✔️ ✔️
  Nachi CA ✔️ ✔️
  Ashigara CA ✔️ ✔️
  Haguro CA ✔️ ✔️
  Takao CA ✔️ ✔️
  Atago CA ✔️ ✔️
  Maya CA ✔️ ✔️
  Choukai CA ✔️ ✔️
  Mogami CA ✔️ ✔️ ✔️
  Kumano CA ✔️
  Suzuya CA ✔️
  Tone CA ✔️ ✔️ ✔️
  Chikuma CA ✔️ ✔️ ✔️
  Kongou FBB ✔️
  Hiei FBB ✔️
  Haruna FBB ✔️
  Kirishima FBB ✔️
  Fusou BB ✔️
  Yamashiro BB ✔️
  Ise BB ✔️
  Hyuuga BB ✔️
  Nagato BB ✔️
  Mutsu BB ✔️
  Shouhou CVL ✔️
  Ryuujou CVL ✔️
  Shouhou CVL ✔️
  Zuihou CVL ✔️
  Hiyou CVL ✔️
  Junyou CVL ✔️
  Akagi CV ✔️
  Kaga CV ✔️
  Souryuu CV ✔️
  Hiryuu CV ✔️
  Shoukaku CV ✔️
  Zuikaku CV ✔️
  I-168 SS ✔️
  I-8 SS ✔️
  I-58 SS ✔️
  Chitose AV ✔️
  Chiyoda AV ✔️

Large Ship Construction

"Large Ship Construction" (LSC) allows to build rarer "bigger" ships in exchange for more resources. Recipes range from 1500-7000 fuel   and ammo  ; 2000-7000 steel   and 1000-7000 bauxite  . Each attempt also costs either 1, 20, or 100 development materials  . Speeding up construction costs 10 instant construction  .

  • LSC is unlocked by completing quest F10.
  • According to the developers, having empty construction docks very slightly increases the chances of obtaining rarer ships [2]. This statement has not been fully tested yet.
  • Construction results are solely determined by the amount of resources and devmats used.
    • For few ships, an exact Secretary is required in order to be built, see below.

LSC Construction Theory

LSC works similarly to normal construction, there are 4 pools determining the ship being crafted. Each group has exactly 100 unique ships and the available pools remain the same regardless of which Secretary used The selection of a pool is based on the resource input during the construction:

  • Pool 1 -   > [math]\displaystyle{ 2400+Rand[0;1200] }[/math],   > [math]\displaystyle{ 1050+Rand[0;900] }[/math],   > [math]\displaystyle{ 2800+Rand[0;1400] }[/math],   > [math]\displaystyle{ 2800+Rand[0;2400] }[/math];
  • Pool 2 -   > [math]\displaystyle{ 2240+Rand[0;1120] }[/math],   > [math]\displaystyle{ 2940+Rand[0;2520] }[/math],   > [math]\displaystyle{ 4400+Rand[0;2200] }[/math],   > [math]\displaystyle{ 1050+Rand[0;900] }[/math],   > 20;
  • Pool 3 -   > [math]\displaystyle{ 1920+Rand[0;960] }[/math],   > [math]\displaystyle{ 2240+Rand[0;1920] }[/math],   > [math]\displaystyle{ 3040+Rand[0;1520] }[/math],   > [math]\displaystyle{ 910+Rand[0;780] }[/math];
  • Pool 4 - Do not meet any of the above requirements.
  • Note: The check is done from top to bottom, if the requirements of multiple pools are fulfilled, only the topmost one is used.

The constructed ship is selected in the pool by a value called "[math]\displaystyle{ ID }[/math]" which can go from 1 to 100, calculated by subtracting two random values:

[math]\displaystyle{ ID }[/math] Calculation
[math]\displaystyle{ ID = Rand [a ; b] - MAX \big( Rand [0 ; Res - 1] ; 50 \big) }[/math]
With
  • [math]\displaystyle{ a,b }[/math] depend on the number of construction docks "open" (either empty or finished):
[math]\displaystyle{ a,b }[/math]
Nb dock [math]\displaystyle{ a }[/math] [math]\displaystyle{ b }[/math]
1 3 99
2 1 99
3 1 95
4 1 91
  • [math]\displaystyle{ Rand }[/math] the function returning a random whole number between its boundaries, included,
  • [math]\displaystyle{ Res }[/math] a whole number that is incremented by having low/high resource inputs of certain types, defined below,
    • The resources used to increment this value depend on the pool that has been selected.
    • Note that if [math]\displaystyle{ Res\lt 1 }[/math] then the result of [math]\displaystyle{ Rand [0 ; Res - 1] }[/math] is zero.

In case [math]\displaystyle{ ID }[/math] is 0 or negative, the value will be converted back into a positive value and incremented by 2.

In LSC every resource (including  ) are used to increment value [math]\displaystyle{ Res }[/math] only the weight depend on the pool:

  • Pool 1:
[math]\displaystyle{ Res = (Fuel-3000) \times 0.003 + (Ammo-2000) \times 0.003 + (Steel-4000) \times 0.004 + (Baux-5000) \times 0.005 + (DevMat-50) \times 0.1 }[/math]
  • Pool 2:
[math]\displaystyle{ Res = (Fuel-3500) \times 0.005 + (Ammo-4500) \times 0.005 + (Steel-5500) \times 0.004 + (Baux-2200) \times 0.002 + (DevMat-60) \times 0.1 }[/math]
  • Pool 3:
[math]\displaystyle{ Res = (Fuel-4000) \times 0.003 + (Ammo-3000) \times 0.003 + (Steel-4000) \times 0.003 + (Baux-1800) \times 0.002 + (DevMat-40) \times 0.2 }[/math]
  • Pool 4:
[math]\displaystyle{ Res = (Fuel-2000) \times 0.002 + (Ammo-2500) \times 0.002 + (Steel-3000) \times 0.002 + (Baux-1500) \times 0.002 + (DevMat-40) \times 0.2 }[/math]

Source: [3]

Large Ship Construction Pools
Large Ship Constructions Pools List
Ship Name Type Pool 4 Pool 3 Pool 2 Pool 1
163   Maruyu SS ✔️ ✔️ ✔️ ✔️
155   I-401 SSV ✔️
137   Agano CL ✔️ ✔️ ✔️
138   Noshiro CL ✔️ ✔️ ✔️
139   Yahagi CL ✔️ ✔️ ✔️
154   Katori CT ✔️
265   Kashima CT ? ? ? ?
51   Mogami CA ✔️
116   Mikuma CA ✔️
124   Suzuya CA ✔️ ✔️
125   Kumano CA ✔️ ✔️
63   Tone CA ✔️
64   Chikuma CA ✔️
248   Zara CA ✔️
21   Kongou FBB ✔️ ✔️ ✔️
22   Hiei FBB ✔️ ✔️ ✔️
23   Haruna FBB ✔️ ✔️ ✔️
24   Kirishima FBB ✔️ ✔️ ✔️
171   Bismarck FBB ✔️
26   Fusou BB ✔️ ✔️ ✔️
27   Yamashiro BB ✔️ ✔️ ✔️
3   Ise BB ✔️ ✔️ ✔️
4   Hyuuga BB ✔️ ✔️ ✔️
1   Nagato BB ✔️ ✔️ ✔️
2   Mutsu BB ✔️ ✔️ ✔️
131   Yamato BB ✔️ ✔️
143   Musashi BB ✔️
239   Warspite BB ✔️
30   Ryuujou CVL ✔️
65   Hiyou CVL ✔️
66   Junyou CVL ✔️
94   Shouhou CVL ✔️
112   Zuihou CVL ✔️
6   Akagi CV ✔️
7   Kaga CV ✔️
8   Souryuu CV ✔️
9   Hiryuu CV ✔️
106   Shoukaku CV ✔️
107   Zuikaku CV ✔️
153   Taihou CV ✔️
233   Saratoga CV ✔️
315   Ark Royal CV ✔️
251   Mizuho AV ✔️
161   Akitsu Maru LHA ✔️ ✔️ ✔️
162   Kamoi AO ✔️
260   Hayasui AO ? ? ? ?

Special Secretary

Some ships require a specific Secretary (1st fleet flagship) in order to be crafted.

  • For any other construction, the Secretary is independent of the crafting result.
Special Construction Requirements
Required Secretary Ship added to craft pool Notes
Normal Construction
 
Z1
 
Z3
Quest D8 MUST be completed first.[citation needed]
 
Z3
 
Z1
Large Ship Construction
 
Z1
 
Z3
 
Bismarck
 
Libeccio
 
Pola
 
Zara
 
Kamoi
 
Iowa
 
Saratoga
 
Kongou Kai Ni
 
Warspite
Kongou must be Kai Ni /C 
 
Warspite
 
Ark Royal

Construction Timers

The times below reflect the type of ship or specific ship you will obtain after hitting the build button.

Time Ship Type Result Note
00:17:00 Submarine Maruyu  LSC
00:18:00 Destroyer Mutsuki-class 
 
 
 
 
 
 
 
 
00:20:00 Fubuki-class 
 
 
 
 
 
, Ayanami-class 
 
 
 
 
 
, Akatsuki-class 
 
 
 
, Hatsuharu-class 
 
 
 
00:22:00 Shiratsuyu-class 
 
 
 
 
 
, Asashio-class 
 
 
 
 
 
Submarine I-168 , I-8 , I-58 
00:24:00 Destroyer Kagerou-class 
 
 
 
 
, Z1-class 
 
00:30:00 Shimakaze 
01:00:00 Light Cruiser Tenryuu-class 
 
, Kuma-class 
 
 
 
 
, Nagara , Natori , Yura , Sendai-class 
 
 
Agano-class 
 
 
LSC
Heavy Cruiser Furutaka-class 
 
, Aoba-class 
 
01:10:00 Training Cruiser Katori 
Kashima  LSC
Heavy Cruiser Zara  LSC
01:15:00 Light Cruiser Kinu , Abukuma 
01:20:00 Heavy Cruiser Myoukou-class 
 
 
 
01:22:00 Light Cruiser Yuubari 
01:25:00 Heavy Cruiser Takao-class 
 
 
 
01:30:00 Mogami , Suzuya , Kumano , Tone-class 
 
Mikuma  LSC
02:00:00 Light Aircraft Carrier Houshou 
02:20:00 Seaplane Tender Chitose , Chiyoda 
Mizuho  LSC
Fleet Oiler Kamoi  LSC
02:30:00 Amphibious Assault Ship Akitsu Maru  LSC
02:40:00 Light Aircraft Carrier Shouhou-class 
 
02:50:00 Ryuujou 
03:00:00 Hiyou-class 
 
03:20:00 Aircraft Carrying Submarine I-401  LSC
03:40:00 Fleet Oiler Hayasui  LSC
04:00:00 Fast Battleship Kongou-class 
 
 
 
04:10:00 Regular Aircraft Carrier Souryuu , Hiryuu 
Ark Royal  LSC
04:20:00 Battleship Fusou-class 
 
Regular Aircraft Carrier Kaga 
04:30:00 Battleship Ise-class 
 
Regular Aircraft Carrier Akagi 
04:40:00 Battleship Warspite  LSC
05:00:00 Battleship Nagato-class 
 
Bismarck  LSC
05:30:00 Regular Aircraft Carrier Saratoga  LSC
06:00:00 Regular Aircraft Carrier Shoukaku-class 
 
06:40:00 Armored Aircraft Carrier Taihou  LSC
08:00:00 Battleship Yamato-class 
 
LSC

Ship Availability

Ship Availability
Ship Type Buidable Unbuidable
Craftable LSC only Drops Event Only
DE Matsuwa · Sado · Tsushima · Hirato · Mikura · Hiburi · Daitou Kaiboukan No.22 · Inagi · Shounan · Ukuru · Kurahashi · Noumi · Shimushu · Kunashiri · Hachijou · Ishigaki · Etorofu · Fukae · Yashiro · Kaiboukan No.4 · Kaiboukan No.30
DD Mutsuki · Kisaragi · Yayoi · Satsuki · Fumizuki · Nagatsuki · Kikuzuki · Mikazuki · Mochizuki · Fubuki · Shirayuki · Hatsuyuki · Miyuki · Murakumo · Isonami · Ayanami · Shikinami · Oboro · Akebono · Sazanami · Ushio · Akatsuki · Hibiki · Ikazuchi · Inazuma · Hatsuharu · Nenohi · Wakaba · Hatsushimo · Shiratsuyu · Shigure · Murasame · Yuudachi · Samidare · Suzukaze · Asashio · Ooshio · Michishio · Arashio · Arare · Kasumi · Kagerou · Shiranui · Kuroshio · Yukikaze · Akigumo · Shimakaze · Z1 · Z3 Kamikaze · Asakaze · Hatakaze · Uzuki · Minazuki · Uranami · Amagiri · Sagiri · Harusame · Umikaze · Yamakaze · Kawakaze · Asagumo · Yamagumo · Oyashio · Hatsukaze · Amatsukaze · Tokitsukaze · Urakaze · Isokaze · Hamakaze · Tanikaze · Nowaki · Arashi · Hagikaze · Maikaze · Yuugumo · Makigumo · Kazagumo · Naganami · Takanami · Fujinami · Okinami · Kishinami · Asashimo · Hayashimo · Kiyoshimo · Libeccio Yuugure · Shirakumo · Natsugumo · Heywood L. Edwards · Mogador · Fuyutsuki · Javelin · Tamanami · Ume · Hayashio · Harukaze · Matsukaze · Usugumo · Ariake · Minegumo · Makinami · Suzunami · Hayanami · Hamanami · Akishimo · Akizuki · Teruzuki · Suzutsuki · Hatsuzuki · Matsu · Take · Momo · Maestrale · Grecale · Scirocco · Fletcher · Johnston · Samuel B. Roberts · Jervis · Janus · Tashkent
CL Tenryuu · Tatsuta · Kuma · Tama · Kitakami · Ooi · Kiso · Nagara · Isuzu · Natori · Yura · Kinu · Abukuma · Sendai · Jintsuu · Naka · Yuubari Agano · Noshiro · Yahagi Sakawa · Ooyodo Gloire · Brooklyn · Phoenix · Duca degli Abruzzi · Giuseppe Garibaldi · Honolulu · Helena · Atlanta · Sheffield · Gotland · De Ruyter · Perth
CA Furutaka · Kako · Aoba · Kinugasa · Myoukou · Nachi · Ashigara · Haguro · Takao · Atago · Maya · Choukai · Mogami · Suzuya · Kumano · Tone · Chikuma Mikuma · Zara Pola Tuscaloosa · Prinz Eugen · Northampton · Houston
F/BB Kongou · Hiei · Haruna · Kirishima · Fusou · Yamashiro · Ise · Hyuuga · Nagato · Mutsu Bismarck · Yamato · Musashi · Warspite Massachusetts · Jean Bart · Littorio · Roma · Washington · South Dakota · Iowa · Richelieu · Gangut · Nevada · Rodney · Valiant · Maryland · Conte di Cavour · Colorado · Nelson
CVL Houshou · Ryuujou · Shouhou · Zuihou · Hiyou · Junyou Gambier Bay Yawata Maru · Langley · Kasuga Maru · Shinyou
CV/B Akagi · Kaga · Souryuu · Hiryuu · Shoukaku · Zuikaku Saratoga · Ark Royal · Taihou Unryuu Ranger · Lexington · Amagi · Katsuragi · Graf Zeppelin · Aquila · Intrepid · Hornet · Victorious
SS/V I-168 · I-8 · I-58 Maruyu · I-401 I-19 · Luigi Torelli C.Cappellini · Scamp · Salmon · Drum · I-201 · I-26 · I-47 · I-203 · U-511 · I-41 · I-36 · I-13 · I-14 · I-400
Aux Chitose · Chiyoda · Katori Mizuho · Akitsu Maru · Kashima · Kamoi · Hayasui Akitsushima · Akashi · Taigei Nisshin · Commandant Teste · Kumano Maru · No.101 Transport Ship · Shinshuu Maru · Heian Maru · Jingei · Chougei · Asahi · Yamashio Maru · Souya
  • Some ships are rewarded in Quests.
  • Several ships are currently dropable for a limited time, see here.
  • Some ships may become buildable in future updates.

Building recipes

See Also