Construction

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).

• For a more comprehensive list of construction recipes and rates, please see PoiDB's construction page.

Constructing a girl costs a selectable amount of the 4 main Resources as well as "development materials" . It will also take a variable amount of time unless instant constructions 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

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 we call [math]\displaystyle{ ID }[/math] which can go from 1 to 100. It is calculated by substating two random value [math]\displaystyle{ Rand_1 }[/math] and [math]\displaystyle{ Rand_2 }[/math].

[math]\displaystyle{ ID }[/math] Calculation
[math]\displaystyle{ ID=Rand_1-Rand_2 }[/math] With [math]\displaystyle{ Rand_1 }[/math] a random number between 0 and 100, [math]\displaystyle{ Rand_2 }[/math] a random number generated between 0 and [math]\displaystyle{ Res-1 }[/math]. In case value ID becomes 0 or negative, the value will be converted back into a positive value and incremented by 2:
Note Every random function here give a random whole number between A and B with A and B included
Which resources that are used to increment value [math]\displaystyle{ Res }[/math] is dependent on the pool that has been selected: Pool 1: [math]\displaystyle{ Res=MAX \Bigg( abs \Big( \Bigg\lceil \frac{Steel-400}{25} \Bigg\rceil + \Bigg\lceil \frac{Baux-300}{20} \Bigg\rceil \Big); 51\Bigg) }[/math] Pool 2: [math]\displaystyle{ Res=MAX \Bigg( abs \Big( \Bigg\lceil \frac{abs(Ammo-400)}{25} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-600)}{30} \Bigg\rceil \Big); 51\Bigg) }[/math] Pool 3: [math]\displaystyle{ Res=MAX \Bigg( abs \Big( \Bigg\lceil \frac{abs(Ammo-200)}{13} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-200)}{20} \Bigg\rceil \Big); 51\Bigg) }[/math] Pool 4: [math]\displaystyle{ Res=MAX \Bigg( abs \Big( \Bigg\lceil \frac{abs(Fuel-100)}{10} \Bigg\rceil + \Bigg\lceil \frac{abs(Steel-30)}{15} \Bigg\rceil \Big); 51\Bigg) }[/math] With [math]\displaystyle{ Res }[/math] a number that can be incremented by having low/high resource inputs of certain types, 51 is its maximum possible value. The resources used to increment this value depend on the pool that has been selected. [math]\displaystyle{ \lceil x \rceil }[/math] is the function ceiling which round decimals upwards [math]\displaystyle{ abs }[/math] is the function absolute, which always return the number positive. [1]

Pratical conclusion

• Only 2 resource will have an effect depending of the pool. Changing the two other will ahve no effect as long as it doesn't change the pool.
• On the two resource that have an effect one have a bigger effect than the other.
  • the effect is capped, above a certain threshold increasing the resources further won't have any effect.
• The effect of changing resources will increase the drop of some ship 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 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.

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

• 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.

See Also

• Poi-Statistics Database
• Common Recipes