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*Note: The check is done from top to bottom, if the requirements of multiple pools are fulfilled, only the topmost one is used.
 
*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 we call <math>ID</math> which can go from 1 to 100. It is calculated by substating two random value <math>Rand_1</math> and <math>Rand_2</math>.
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The constructed ship is selected in the pool by a value called "<math>ID</math>" which can go from 1 to 100, calculated by substating two random values:
  
 
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{|class="wikitable mw-collapsible mw-collapsed" width="100%"

Revision as of 09:16, 6 July 2024

Home Port's Mechanics Portal
Ship Equipment
Marriage · Morale and Fatigue · Gifting · Supply
Repairs · Remodel · Modernization · Construction
Development · Improvement · Fit Bonuses
Speed · Range · Plane Proficiency
Stats · Resources · Experience and Rank · Ranking


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 Fuel, ammo Ammunition, steel Steel and bauxite Bauxite and each attempt costs 1 development material Development material. Speeding up construction costs 1 instant construction Instant construction Material.

  • 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+ Fuel, 400+ Steel, 300+ Bauxite,
  • Pool 2 - 400+ Fuel, 600+ Steel,
  • Pool 3 - 250+ Fuel, 200+ Steel,
  • 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_1-Rand_2 }[/math]
With
  • [math]\displaystyle{ Rand_1 }[/math] a random whole number between 0 and 100 included,
  • [math]\displaystyle{ Rand_2 }[/math] a random whole number generated between 0 and [math]\displaystyle{ Res - 1 }[/math] included.

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:

  • Pool 1: Steel Bauxite
[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]
  • Pool 2: Ammunition Steel
[math]\displaystyle{ Res=MAX \Bigg( \Bigg| \Bigg\lceil \frac{abs(Ammo-400)}{25} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-600)}{30} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
  • Pool 3: Ammunition Steel
[math]\displaystyle{ Res=MAX \Bigg( \Bigg| \Bigg\lceil \frac{abs(Ammo-200)}{13} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-200)}{20} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
  • Pool 4: Fuel Steel
[math]\displaystyle{ Res=MAX \Bigg( \Bigg| \Bigg\lceil \frac{abs(Fuel-100)}{10} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-30)}{15} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math]
With
  • [math]\displaystyle{ Res }[/math] a number that can be incremented by having low/high resource inputs of certain types,
    • The resources used to increment this value depend on the pool that has been selected.

[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.

Large Ship Construction

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

  • 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.

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
Ship Banner Z1.png
Z1
Ship Banner Z3.png
Z3
Quest D8 MUST be completed first.[citation needed]
Ship Banner Z3.png
Z3
Ship Banner Z1.png
Z1
Large Ship Construction
Ship Banner Z1.png
Z1
Ship Banner Z3.png
Z3
Ship Banner Bismarck.png
Bismarck
Ship Banner Libeccio.png
Libeccio
Ship Banner Pola.png
Pola
Ship Banner Zara.png
Zara
Ship Banner Kamoi.png
Kamoi
Ship Banner Iowa.png
Iowa
Ship Banner Saratoga.png
Saratoga
Ship Banner Kongou Kai Ni.png
Kongou Kai Ni
Ship Banner Warspite.png
Warspite
Kongou must be Kai NiKongou Kai Ni/CKongou Kai Ni C
Ship Banner Warspite.png
Warspite
Ship Banner Ark Royal.png
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 MaruyuMaruyu LSC
00:18:00 Destroyer Mutsuki-classMutsuki
Kisaragi
Yayoi
Satsuki
Fumizuki
Nagatsuki
Kikuzuki
Mikazuki
Mochizuki
00:20:00 Fubuki-classFubuki
Shirayuki
Hatsuyuki
Miyuki
Murakumo
Isonami
, Ayanami-classAyanami
Shikinami
Oboro
Akebono
Sazanami
Ushio
, Akatsuki-classAkatsuki
Hibiki
Ikazuchi
Inazuma
, Hatsuharu-classHatsuharu
Nenohi
Wakaba
Hatsushimo
00:22:00 Shiratsuyu-classShiratsuyu
Shigure
Murasame
Yuudachi
Samidare
Suzukaze
, Asashio-classAsashio
Ooshio
Michishio
Arashio
Arare
Kasumi
Submarine I-168I-168, I-8I-8, I-58I-58
00:24:00 Destroyer Kagerou-classKagerou
Shiranui
Kuroshio
Yukikaze
Akigumo
, Z1-classZ1
Z3
00:30:00 ShimakazeShimakaze
01:00:00 Light Cruiser Tenryuu-classTenryuu
Tatsuta
, Kuma-classKuma
Tama
Kitakami
Ooi
Kiso
, NagaraNagara, NatoriNatori, YuraYura, Sendai-classSendai
Jintsuu
Naka
Agano-classAgano
Noshiro
Yahagi
[1]
LSC
Heavy Cruiser Furutaka-classFurutaka
Kako
, Aoba-classAoba
Kinugasa
01:10:00 Training Cruiser KatoriKatori
KashimaKashima LSC
Heavy Cruiser ZaraZara LSC
01:15:00 Light Cruiser KinuKinu, AbukumaAbukuma
01:20:00 Heavy Cruiser Myoukou-classMyoukou
Nachi
Ashigara
Haguro
01:22:00 Light Cruiser YuubariYuubari
01:25:00 Heavy Cruiser Takao-classTakao
Atago
Maya
Choukai
01:30:00 MogamiMogami, SuzuyaSuzuya, KumanoKumano, Tone-classTone
Chikuma
MikumaMikuma LSC
02:00:00 Light Aircraft Carrier HoushouHoushou
02:20:00 Seaplane Tender ChitoseChitose, ChiyodaChiyoda
MizuhoMizuho LSC
Fleet Oiler KamoiKamoi LSC
02:30:00 Amphibious Assault Ship Akitsu MaruAkitsu Maru LSC
02:40:00 Light Aircraft Carrier Shouhou-classShouhou
Zuihou
02:50:00 RyuujouRyuujou
03:00:00 Hiyou-classHiyou
Junyou
03:20:00 Aircraft Carrying Submarine I-401I-401 LSC
03:40:00 Fleet Oiler HayasuiHayasui LSC
04:00:00 Fast Battleship Kongou-classKongou
Hiei
Haruna
Kirishima
04:10:00 Regular Aircraft Carrier SouryuuSouryuu, HiryuuHiryuu
Ark RoyalArk Royal LSC
04:20:00 Battleship Fusou-classFusou
Yamashiro
Regular Aircraft Carrier KagaKaga
04:30:00 Battleship Ise-classIse
Hyuuga
Regular Aircraft Carrier AkagiAkagi
04:40:00 Battleship WarspiteWarspite LSC
05:00:00 Battleship Nagato-classNagato
Mutsu
BismarckBismarck LSC
05:30:00 Regular Aircraft Carrier SaratogaSaratoga LSC
06:00:00 Regular Aircraft Carrier Shoukaku-classShoukaku
Zuikaku
06:40:00 Armored Aircraft Carrier TaihouTaihou LSC
08:00:00 Battleship Yamato-classYamato
Musashi
LSC
  1. SakawaSakawa is unbuildable

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