Combat/Anti-Installation

Installations are an enemy-type representing "land-based installations", and are characterized by high armor and high HP. They are difficult to handle using normal anti-ship setups and require specific setups in order to be destroyed. Installations are typically found as bosses or as boss escorts.

General Characteristics

• Installations cannot perform or benefit from flagship protection.
• They have different damage statuses instead of the normal ones used for ships.

Ship Damage Label	Installation Damage Label
Lightly Damaged (小破)	Confused (混乱)
Moderately Damaged (中破)	Damaged (損害)
Heavily Damaged (大破)	Broken (損壊)
Sunk (撃沈)	Destroyed (破壊)

Installation Classification

Installations are classified by two categories: Ship Type (BB, BBV, CV) and Toughness (Soft Skin or Hard Skin).

Ship Type

Type	Characteristics
Battleship (BB)	Examples are Artillery Imps and Central Princess. Uses the surface shelling formula for calculating damage. Uses the shelling attack animation in day and night battle. Can continue attacking when moderately damaged.
Aviation Battleship (BBV)	Most installations fall under this category. Uses the carrier attack formula for calculating damage. Uses the shelling attack animation in day and night battle. Cannot attack during the day if moderately damaged or if there are no planes left. Forced to attack submarines if they have equipment with Anti-Submarine stat.
Carrier (CV)	Example is Lycoris Princess. Uses the carrier attack formula for calculating damage. Uses the carrier attack animation in day battle and the shelling animation at night. Cannot attack during the day if moderately damaged or if there are no planes left. Do not enable the 2nd shelling phase if there is no battleship present.

Skin Toughness

Type	Characteristics
Soft Skin	Examples are Supply Depot Princess, Harbour Princess and Northern Princess. Takes a lot of damage from AA Shells and less from other Anti-Installation equipment. This weakness allows battleships and heavy cruisers to easily deal with these installation types. Still takes a decent amount of damage from other anti-installation equipment. Supply Depot Princess has extra Post-Cap modifiers.
Hard Skin	Examples are Isolated Island Demon, Artillery Imp, and Harbour Summer Princess. Takes more damage from Anti-Installation equipment like Landing Crafts, Amphibious Tanks and Anti-ground Artillery

• Please note that event only installation might not be in one of these categories.

Attack Behavior

The targeting of installation follow some special rules.

Suport Expedition

• Shelling Support expedition can attack Instllation.
• It's unknown if torpedo support and ASW support will target installaion or not.

Air strike

• Normal dive bombers can not attack installations during the air strike phase.
• Only Anti-installation Dive Bombers can target installation.
• It's unknown if ASW plane will prioritize Submarine or installation.

Dive-Bombers that can attack installations
Carriers will only attack installations in the shelling phase if equipped with Torpedo Bombers or Anti-Installation Dive Bombers. Additionally, carriers will attack installations if equipped with non-special dive bombers AND one of the special dive bombers below. Any other dive bomber will completely disable shelling against installations even if the carrier has a torpedo bomber equipped. This can be very useful to manipulate the targeting mechanic so the carriers attack important targets.
Ju 87C Kai Prototype Nanzan F4U-1D FM-2 Ju 87C Kai Ni (w/ KMX) Ju 87C Kai Ni (w/ KMX/Skilled) Suisei Model 12 (634 Air Group w/ Type 3 Cluster Bombs) AAR Suisei Model 12 (w/ Type 31 Photoelectric Fuze Bombs) AAR Type 99 Dive Bomber Model 22 Type 99 Dive Bomber Model 22 (Skilled) SB2C-3 SB2C-5 F4U-4 AAR

Shelling

• Submarines can attack installations during shelling if equipped with a Special Type 2 Amphibious Tank.
  • They will only target instllations during the shelling phases.
  • They will be able to attack installations at night regardless of equipment.
  • Their low firepower makes them poor anti-installation ships.
• Carriers are unable to perform CVCI on installations, even if equipped with anti-installation dive bombers.
• Ise and Hyuuga can perform the suisei-CI against installation with any Dive Bomber.
• Special Attacks behave like normal against installation.

Torpedo

• Both opening and closing torpedoes can not target installations.
  • Opening and closing torpedoes will fail to trigger if only installation targets remain.

Night Battle

• The torpedo stat is ignored when calculating night battle damage against installations. Please see Night Battle for more details.
  • This makes destroyers, light cruisers, and heavy cruisers much weaker unless equipped with anti-installation equipment.
• When targeting installation the Cut-in choice will ignore any equiped torpedo.
  • Except Special DD Cut-in that include a main gun (torpedo stat is still considered equal to 0).
• Night shelling Carrier Attacks will deal damage like they would to ships.
  • This include Ark Royal's night swordfish attack.
• Air night attacks ignore all anti-installation bonus
  • The attack can target installations even if no anti-anstallation dive bombers is equiped

Damage Calculation

• During day, damage is capped at 220 so any ship with a proper anti-installation setup will be able to hit the cap.
  • When facing hard-skinned installations, it is better for battleships to have AP shells instead of Type 3 because they will hit the day cap anyway.
• Anti-installation is very important during night battle when the cap is raised to 360.
• Torpedo stat is always counted as 0 when attacking installations. This applies to both airstrikes and night battles.
  • However improvement that give "Yasen" is taken into account.
• Supply Depot Princess is the only known installation that takes post-cap damage from anti-installation equipment.
  • This makes her vulnerable to getting one shot by nuke setups. See below for details.
• While dive bombers have a post-cap bonus during the air-strike, the low base damage means it is of limited effectiveness against high armor installations.
• The Armor Percing modifier (post-cap) is effective against installation.

Calculation

Installations generally have a lot of HP and/or armor. But multiple different cumulative bonuses exist against them, allowing for massive damage when using the right set-ups. These bonuses are divided into 5 groups and are calculated in the following order:

1. Ship type bonuses
2. General multiplicative bonuses
3. Specific equipment bonuses:
   1. 11th regiment bonuses
   2. M4A1 bonuses
   3. Ho-Ni bonuses
   4. Landing craft synergy bonuses
4. General Flat bonuses
5. Post-cap bonuses against Supply Depot Princess

• The order of bonuses is still being researched so it might change in the future

Pre-cap Shelling:

• [math]\displaystyle{ \text{Atk}_\text{pre-cap} = \Big( \big[ \big( [ ( \text{Atk}_\text{base} {\color{tomato} \times \text{A0}} {\color{DeepSkyBlue} + \text{B0}} ) {\color{tomato} \times \text{A1}} {\color{DeepSkyBlue}} ] {\color{tomato} \times \text{A21}} {\color{DeepSkyBlue} + \text{B21}} \big) {\color{tomato} \times \text{A22}} {\color{DeepSkyBlue} + \text{B22}} \big] {\color{tomato} \times \text{A23}} {\color{DeepSkyBlue} + \text{B23}} \Big) {\color{tomato} \times \text{A24}} {\color{DeepSkyBlue} + \text{B24} + \text{B1}} }[/math]

Pre-cap Carrier Shelling:

• [math]\displaystyle{ \text{Atk}_\text{pre-cap} = \Big[ \Big( \big[ \big( [ \text{Atk}_\text{base} {\color{tomato} \times \text{A1}} ] {\color{tomato} \times \text{A21}} {\color{DeepSkyBlue} + \text{B21}} \big) {\color{tomato} \times \text{A22}} {\color{DeepSkyBlue} + \text{B22}} \big] {\color{tomato} \times \text{A23}} {\color{DeepSkyBlue} + \text{B23}} \Big) {\color{tomato} \times \text{A24}} {\color{DeepSkyBlue} + \text{B24} + \text{B1}} +(\text{DB} \times 1.3) + 15 \Big] \times 1.5 +25 }[/math]

Cap

• [math]\displaystyle{ \text{Atk}_\text{cap} = \text{Cap} \times \sqrt{\text{Atk}_\text{pre-cap} - \text{Cap}} }[/math]

Post-cap:

• [math]\displaystyle{ \text{Atk}_\text{post-cap} = \text{Atk}_\text{cap} {\color{tomato} \times \text{C}} }[/math]

With:

• [math]\displaystyle{ \text{Atk}_\text{base} }[/math] the base attack deffined here,
• A & C the Multiplicative bonuses,
• B the Flat bonuses,
• A & B being pre-cap bonuses,
• C being post-cap bonuses.
• [math]\displaystyle{ \text{DB} }[/math] being the bombing stat of Anti-installation Dive Bomber only
• [math]\displaystyle{ \text{Cap} }[/math] is:
  • 220 during day,
  • 360 during night.

Bonuses

Ship type bonuses

	Ship type	Target	Bonuses
A0	DD/CL	Artillery Imp	x1.4
B0	SS/SSV	Any installation	+30

General multiplicative bonuses

These bonuses are the only ones that depend on the enemy targeted.

A1
Installation Type		Soft-Skinned
Number Equipped		Single	Multiple	Single	Multiple	Single	Multiple	Single	Multiple
	AA Shells	2.5		1.75/1.7?				1.75
	AP Shells					1.85		1.3
	WG42 (Wurfgerät 42)	1.3	1.82	1.4	2.1	1.6	2.72	1.4	1.68
	Anti-Ground Rocket Launcher	1.25	1.875	1.3/1.5?	2.145	1.5	2.7	1.25	1.75
	ASW Mortars	1.2	1.56	1.2	1.68	1.3	1.95	1.1	1.265
Landing Craft Type Multiplier		1.4		1.8		1.8		1.7
Landing Craft Improvement Multiplier		1 + (Average /50) ( 1.2x)
	Toku Daihatsu Landing Craft	1.15		1.15		1.15		1.2
	DLC + T89 tank Toku DLC + Ho-Ni tank	1.5	1.95	1.2	1.68	1.5	2.1	1.6	2.4
	DLC + Panzer	1.5		1.2		1.5		1.6
	Toku DLC + 11th Reg
	M4A1 DD	1.1		1.8		2.0		2.0
	Armed Daihatsu Soukoutei ☀ Day Only	1.1	1.21	1.3	1.43	1.3	1.56	?
	Ka-Mi tank	1.5	1.8	2.4	3.24	2.4	3.24	2.8	4.2
Amphibious Tank Improvement Multiplier		1 + (Average /30) ( 1.33x)
	Anti-Installation Dive Bombers			1.4	2.45	1.5	3.0	1.3
	Seaplane Bombers/Fighters	1.2				1.5		1.3

Notes

• The Improvement Bonus takes the average for all Landing Crafts equipped on the ship.
• The Improvement Bonus takes the average for all Kami equipped on the ship.
• The devs have mentioned that Rations
  
  consumed by a girl "affect landing crafts' morale".

Specific equipment bonuses

The following multipliers are pre-cap.

Equipment			Multiplicative bonus	Flat Bonus
Toku DLC Tank Bonus			A21	B21
Toku DLC + 11th Reg Toku DLC + Ho-Ni tank			1.8	25
Sherman Bonus			A22	B22
M4A1 DD			1.4	35
Ho-Ni Tank Regiment Bonus			A23	B23
Toku DLC + Ho-Ni tank			1.3	42
DLC Synergy Bonus			A24	B24
Armed Daihatsu Soukoutei	Group 1	Group 2	Multiplicative bonus	Flat Bonus
Only one	1 of Any		1.2	10
Both	1	0	1.32	12
	0	1	1.44	13
	2 of any		1.56	15

Flat Damage Bonuses

B1
Amount Equipped		1	2	3	4
	WG42	75	110	140	160
	Anti-Ground Rocket Launcher	55	115	160	190
	Anti-Ground Rocket Launcher CD	80	170	230	260
	ASW Mortar	30	55	75	90
	ASW Mortar CD	60	110	150	180

Post-Cap Bonus

Supply Depot Princess is currently the only installation to have post-cap bonus for shelling. These bonueses are applied after the soft damage cap. As a reminder for pre-cap bonuses she's a soft-skin installation.

C
Installation Type
Number Equipped		Single	Multiple
	WG42	1.25	1.625
	Anti-Ground Rocket Launcher	1.2	1.68
	ASW Mortars	1.15	1.38
	Landing Craft Type Multiplier	1.7
Landing Craft Improvement Multiplier		[1 + (Average /50)] N Any Landing Craft: 1 Landing Craft + Ho-Ni: 2 DLC (Panzer II/NA): 3
	Toku Daihatsu Landing Craft	1.2
	DLC + T89 tank Toku DLC + Ho-Ni tank	1.3	2.08
	DLC + Panzer	1.3
	Toku DLC + 11th Reg
	M4A1 DD	1.2
	Armed Daihatsu Soukoutei	1.5	1.65
	Ka-Mi tank	1.7	2.55
Amphibious Tank Improvement Multiplier		1 + (Average /30) ( 1.33x)

• Because the Ho-Ni isn't improvable the best improvement bonus is x1.211.1*1.1
  • This means adding a Ho-Ni with a max t89 tank doesn't affect the improvement bonus.
• The improvement bonus with Panzer needs another Landing Craft.
  • Because the panzer cannot be improved the best improvement bonus is x1.3311.1*1.1*1.1
• The bonus for the panzer against known installations is identical to the t89 tank.

Land Base Bonus

For the formula see the LBAS page. The bonuses work for all bombers on the land base (except maybe jets).

Installation Targeted
Pre-cap	Multiplicative	[math]\displaystyle{ {\color{tomato}\text{Mod}_\text{AIpre}} }[/math]		-
		1.18	1.6	-
Post-cap		[math]\displaystyle{ {\color{tomato}\text{Mod}_\text{AIpost3}} }[/math]		[math]\displaystyle{ {\color{tomato}\text{Mod}_\text{AIpost1}} }[/math]
		1.7	1.55	2.1
	Flat	-		[math]\displaystyle{ {\color{DeepSkyBlue}\text{Mod}_\text{AIpost2}} }[/math]
		-	-	100

Air strike

We are lacking information on opening air-strike.

Equipment Setups

Below are recommended equipment setups for anti-installation. The equipment order is illustrative and does not matter much.

As a general rule if there is:

• One Anti-Ground Artillery equiped use a WG42
• Mutiple Anti-Ground Artillery equiped use Shipborne Model Type 4 20cm Anti-ground Rocket Launcher (or CD)

" Nuke setups" describe any setups using at least 1 Anti-ground Rocket Launcher

, 1 Landing Craft , and 1 Tank .

• Such setup has a powerful anti-installation power against all installations but is hampered by the daytime damage cap.
• It can be further improved by using more of those types of equipment when applicable.
• Using a Tank or a Landing Craft with specific bonus instead of a ground rocket gives better damage, however it's advised to rather distribute these assets instead.

All the "surface" anti-installation setups can be further enhanced by using them in Special Attacks, especially Nelson's Touch.

Equipment Setup	Notes
BB/FBB/BBV
	The basic battleship setup. Because they can reach the damage cap easily, they do not benefit much from anti-installation equipment. The standard artillery spotting setup will allow them to be effective against all other targets including the installation.
	This is an option when facing soft-skinned installations. Taking an AA shell will limit the battleship's effectiveness against all other targets.
	Yamato-class Kai Ni & Ise-class Kai Ni only. "Best of both worlds" for 5-slot battleships.
	Nagato-class Kai Ni & Yamato Kai Ni Juu only. The landing craft/amphibious tank will make their Special Attacks deal significantly more damage to installation enemies. Keeping the seaplane allows to still perform artillery spotting to maintain enough effectiveness against other targets.
+	" Nuke setups", Yamato Kai Ni Juu only. A proper nuke setup keeping the Double Attack and artillery spotting, that uses Yamato's ability to carry Secondary Guns in her RE, also taking advantage of her Special Attack.
CA/CAV
	The standard anti-installation setup for heavy cruisers. It allows artillery spotting and deals decent damage against installations.
	This is an alternative setup only for aviation cruisers. It removes the ability to artillery spot for much more powerful anti-installation damage at night.
+	" Nuke setups", Mogami Kai Ni Toku only. The last setup uses Mogami's ability to carry 8cm High-angle Guns in her RE, making this a true nuke setup while keeping the Double Attack.
CL
	" Nuke setup".
	A setup for 4-slot light cruisers. This preserves their ability to double attack at night while giving them significant anti-installation power.
DD
	" Nuke setup".
	" Mini-Nuke setup" Substitute nukes to use ONLY when lacking Landing Craft or Amphibious Tanks.
	Setups that keep the Double Attack while maintaining decent anti-installation power, allowing reasonable effectiveness against installation and other targets at night.
	Tashkent only. Functions much like the light cruiser setup with a powerful night battle double attack.
CV/CVB/CVL
	This is only to be used when having anti-installation dive bombers. It will allow the carrier to still perform CVCI against other targets.
	The numbers of torpedo bombers and fighters in this setup can be varied depending on the amount of fighter power required. This is the standard carrier anti-installation setup. While it does sacrifice CVCI, the carrier shelling formula, and proficiency bonuses, it still ensures that carriers will do significant damage to installations and other targets.
	Gambier Bay Mk.II & Unyou Kai/Ni only. The closest setup to a proper "CV nuke".
AV
	" Nuke setup". 4-slot AVs can also either take a 2nd anti-ground rocket, a midget sub, or a seaplane fighter in their last slot.
LHA
	" Nuke setup". LHA can carry the strongest 4 slots nukes.
+	" Mega-Nuke setup", Shinshuu Maru Kai only. Use Shinshuu Maru's unique ability to carry a Soukoutei (Armored Boat Class) in her RE to further improve the LHA setup. The other Landing Craft should be the Armed Daihatsu for optimum effectiveness.

Additional Information

Landing Craft/Amphibious Tank Capable Ships

Ships that can equip Landing Craft / Amphibious Vehicles
Type	Landing Craft		Both &		Amphibious Vehicle
DD			Kai Ni D Kai Ni D Kai Ni D Kai Ni D		Kai Ni
CL		Kai Ni D Kai Ni Toku
CAV		Kai Ni Toku
(F)BB(V)		Kai Ni Juu	Kai Ni C
CVL		Kai Ni Sen
AV		Kai Ni Toku
AO
LHA
SS(V)			All
RE	Soukoutei (Armored Boat Class): Shinshuu Maru Ka-Tsu tanks : I-36  · I-41  · I-47 Kai · I-58 Kai
[edit]

See Also

• Abyssal Land Bases List