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=Introduction=
+
#REDIRECT [[Aerial_Combat#Stage_2_-_Fleet_Anti-Air_Defense]]
 
 
This page is to provide detail on how plane shoot down is calculated during the [[Aerial Combat#Fleet Air Defense|Fleet Air Defense]] phase of aerial combat.
 
 
 
=Fleet Air Defense=
 
===Adjusted Anti-Air===
 
There are two adjusted anti-air values that are taken into account when calculating shoot down; the ship adjusted AA and fleet adjusted AA. The following formulas only apply to '''ship girls'''. Abyssals have their own formula.
 
 
 
<math>\text{Adj AA}_\text{ship} = \text{AA}_\text{ship} + \sum_{\text{All Slots}} \left( \text{Mod}_\text{equipS} \times \text{AA}_\text{equip} \right) + \left( \text{Mod}_\text{ImprS} \times \sqrt{\bigstar} \right)</math>
 
 
 
* <math>\text{AA}_\text{ship}</math> is the base {{AA}} of the ship.
 
* <math>\text{Mod}_\text{equipS}</math> is the '''ship anti-air''' equipment modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]/[[:Category:AAFD|Anti-Air Fire Director]]: <math>4.0</math>
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]: <math>6.0</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>3.0</math>
 
** Other equipment: <math>0</math>
 
* <math>\text{AA}_\text{equip}</math> is the base {{AA}} of the equipment.
 
* <math>\text{Mod}_\text{ImprS}</math> is the '''ship anti-air''' equipment improvement modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]: <math>3.0</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>0</math>
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]: <math>4.0</math>
 
* <math>\bigstar</math> is the level of [[Improvement]].
 
 
 
<math>\text{Adj AA}_\text{fleet} = 1.54 \times \left[ \text{Mod}_\text{formation} \times \sum_{\text{All Ships}} \left( \sum_{\text{All Slots}} \left( \text{Mod}_\text{equipF} \times \text{AA}_\text{equip} \right) + \left( \text{Mod}_\text{ImprF} \times \sqrt{\bigstar} \right) \right) \right]</math>
 
 
 
* <math>\text{Mod}_\text{formation}</math> is the formation modifier.
 
** Line Ahead/Echelon/Line Abreast/Combined Fleet Cruising 2/Combined Fleet Cruising 4: <math>1.0</math>
 
** Vanguard/Combined Fleet Cruising 1: <math>1.1</math>\
 
** Double Line: <math>1.2</math>
 
** Combined Fleet Cruising 3: <math>1.5</math>
 
** Diamond: <math>1.6</math>
 
* <math>\text{Mod}_\text{equipF}</math> is the '''fleet anti-air''' equipment modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]/[[:Category:AAFD|Anti-Air Fire Director]]: <math>0.35</math>
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]/Main Guns/Secondary Guns/[[:Category:Seaplanes|Seaplanes]]: <math>0.2</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>0.4</math>
 
** [[:Category:Anti-Aircraft_Shells|Anti-Air Shells]]: <math>0.6</math>
 
* <math>\text{AA}_\text{equip}</math> is the base {{AA}} of the equipment.
 
* <math>\text{Mod}_\text{ImprS}</math> is the '''fleet anti-air''' equipment improvement modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]: <math>3.0</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>1.5</math>
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]: <math>0</math>
 
* <math>\bigstar</math> is the level of [[Improvement]].
 
 
 
===Fixed Shoot Down===
 
 
 
<math>\text{Shootdown}_\text{fixed} = \frac{ \left[ \text{Mod}_\text{equipped} \times \frac{\text{AA}_\text{ship} + \text{Adj AA}_\text{fleet}}{\text{Mod}_\text{equipped}} \right] \times \text{Mod}_\text{AACI} \times \text{Mod}_\text{CF}}{10}</math>
 
 
 
* <math>\text{Mod}_\text{equipped}</math> is the modifier if the ship has any anti-air equipment equipped.
 
** It is <math>2</math> if she is equipped with something and <math>1</math> if not.
 
* <math>\text{Mod}_\text{AACI}</math> is the anti-air cut-in modifier. See [[Anti-Air Fire#Anti-Air Cut-In|below]] for details.
 
* <math>\text{Mod}_\text{CF}</math> is the combined fleet modifier. It is <math>1</math> otherwise.
 
** Main Fleet: <math>0.72</math>
 
** Main Fleet: <math>0.48</math>
 
 
 
===Proportional Shoot Down===
 
 
 
<math>\text{Shootdown}_\text{proportional} = \frac{ \left[ \text{Mod}_\text{equipped} \times \frac{\text{AA}_\text{ship}}{\text{Mod}_\text{equipped}} \right] \times \text{Mod}_\text{CF}}{400} \times \text{N}_\text{planes}</math>
 
 
 
* <math>\text{Mod}_\text{equipped}</math> is the modifier if the ship has any anti-air equipment equipped.
 
** It is <math>2</math> if she is equipped with something and <math>1</math> if not.
 
* <math>\text{Mod}_\text{CF}</math> is the combined fleet modifier. It is <math>1</math> otherwise.
 
** Main Fleet: <math>0.72</math>
 
** Main Fleet: <math>0.48</math>
 
* <math>\text{N}_\text{planes}</math> is the current plane count of the targeted slot.
 
 
 
===Abyssal Anti-Air===
 
 
 
Abyssal anti-air is weaker than ship girl anti-air and can result in 0 shoot downs. It also takes into account adjusted ship AA and adjusted fleet AA into the fixed and proportional shoot downs. 
 
 
 
 
 
<math>\text{Adj AA}_\text{Aship} = 2 \times \sqrt{\text{AA}_\text{Aship}} + \sum_{\text{All Slots}} \left( \text{Mod}_\text{equipS} \times \text{AA}_\text{equip} \right)</math>
 
 
 
<math>\text{Adj AA}_\text{fleet} = 2 \times \left[ \text{Mod}_\text{formation} \times \sum_{\text{All Ships}} \left( \sum_{\text{All Slots}} \left( \text{Mod}_\text{equipF} \times \text{AA}_\text{equip} \right) \right) \right]</math>
 
 
 
* <math>\text{AA}_\text{Aship}</math> is the base {{AA}} of the Abyssal.
 
* <math>\text{Mod}_\text{equipS}</math> is the '''ship anti-air''' equipment modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]/[[:Category:AAFD|Anti-Air Fire Director]]: <math>4.0</math> (Only applies to Twin High-Angles for Abyssals).
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]: <math>6.0</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>3.0</math>
 
** Other equipment: <math>0</math>
 
* <math>\text{Mod}_\text{equipF}</math> is the '''fleet anti-air''' equipment modifier.
 
** [[:Category:High-Angle Mounts|High-Angle Mounts]]/[[:Category:AAFD|Anti-Air Fire Director]]: <math>0.35</math>
 
** [[:Category:Anti-Air Guns|Anti-Air Guns]]/Main Guns/Secondary Guns/[[:Category:Seaplanes|Seaplanes]]: <math>0.2</math>
 
** [[:Category:Anti-Air RADARs|Anti-Air RADARs]]: <math>0.4</math>
 
** [[:Category:Anti-Aircraft_Shells|Anti-Air Shells]]: <math>0.6</math>
 
** Other Abyssal AA equipment (CIC, high-angle single mount, etc): <math>0.2</math>
 
* <math>\text{AA}_\text{equip}</math> is the base {{AA}} of the equipment.
 
* <math>\text{Mod}_\text{formation}</math> is the formation modifier.
 
** Line Ahead/Echelon/Line Abreast/Combined Fleet Cruising 2/Combined Fleet Cruising 4: <math>1.0</math>
 
** Vanguard/Combined Fleet Cruising 1: <math>1.1</math>\
 
** Double Line: <math>1.2</math>
 
** Combined Fleet Cruising 3: <math>1.5</math>
 
** Diamond: <math>1.6</math>
 
 
 
For calculating Abyssal fixed and proportional shootdown:
 
 
 
<math>\text{Shootdown}_\text{fixed} = \frac{\text{AA}_\text{ship} + \text{Adj AA}_\text{fleet}}{10.6}</math>
 
 
 
<math>\text{Shootdown}_\text{proportional} = \frac{\text{Adj AA}_\text{Aship}}{400}</math>
 
 
 
=Anti-Air Cut-In=
 
 
 
When equipped with certain equipment setups, ships will be able to perform special anti-air cut-ins that will boost the shoot down values. With AACI and enough anti-air backing it, it is possible to completely wipe out incoming bombers resulting in no damage to the fleet. This would also mean disabling enemy carrier attacks during day combat due to having 0 planes. 
 
 
 
 
 
===AACI Types===
 
 
 
Unless otherwise specified, any equipment that shares the same icon can be substituted.
 
 
 
{| class="wikitable"
 
|-
 
!style="text-align: center; border-radius: 6px 0 0 0; border-style: solid; border-width: 1px; background-color:#99CCFF; width:32px;"|API
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF;width:128px;"|Type
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF;width:32x;"|Fixed Shootdown
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF;width:32px;"|AACI Modifier
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF;width:32px;"|Trigger %
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF;width:64px;"|User
 
!style="text-align: center; border-radius: 0 6px 0 0; border-style: solid; border-width: 1px; background-color:#99CCFF; width:192px;|Notes
 
|-
 
| N/A
 
| -
 
| +1
 
| 1.0
 
| -
 
| Ship girls only.
 
| Triggers by default to give the minimum 1 shoot down.
 
|-
 
| 1
 
| {{GreenGunDP}}{{GreenGunDP}}{{Radar}}
 
| +8
 
| 1.7
 
| 65%
 
| [[:Category:Akizuki_Class|Akizuki-class]]
 
| Any HA mount will work.
 
|-
 
| 2
 
| {{GreenGunDP}}{{Radar}}
 
| +7
 
| 1.7
 
| 58%
 
| [[:Category:Akizuki_Class|Akizuki-class]]
 
| Any HA mount will work.
 
|-
 
| 3
 
| {{GreenGunDP}}{{GreenGunDP}}
 
| +5
 
| 1.6
 
| 50%
 
| [[:Category:Akizuki_Class|Akizuki-class]]
 
| Any HA mount will work.
 
|-
 
| 4
 
| {{RedGunHeavy}}{{GreenAmmo}}{{AntiAircraftFireDirector}}{{Radar}}
 
| +7
 
| 1.5
 
| 52%
 
| [[:Category:Battleships|Battleships]]
 
|
 
|-
 
| 5
 
| {{GreenGunDP}}{{GreenGunDP}}{{Radar}}
 
| +5
 
| 1.5
 
| 55%
 
| All
 
| Both HA guns must be a [[:Category:High-Angle + AA Fire Director|high-angle gun with built in AA fire directors.]]
 
|-
 
| 6
 
| {{RedGunHeavy}}{{GreenAmmo}}{{AntiAircraftFireDirector}}
 
| +5
 
| 1.45
 
| 40%
 
| [[:Category:Battleships|Battleships]]
 
|
 
|-
 
| 7
 
| {{GreenGunDP}}{{AntiAircraftFireDirector}}{{Radar}}
 
| +4
 
| 1.35
 
| 45%
 
| All
 
|
 
|-
 
| 8
 
| {{GreenGunDP}}{{Radar}}
 
| +5
 
| 1.5
 
| 50%
 
| All
 
| The HA gun must be a [[:Category:High-Angle + AA Fire Director|high-angle gun with built in AA fire directors.]]
 
|-
 
| 9
 
| {{GreenGunDP}}{{AntiAircraftFireDirector}}
 
| +3
 
| 1.3
 
| 40%
 
| All
 
|
 
|-
 
| 10
 
| {{GreenGunDP}}{{GreenGunMG}}{{Radar}}
 
| +9
 
| 1.65
 
| 60%
 
| [[Maya|Maya Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 11
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +7
 
| 1.5
 
| 55%
 
| [[Maya|Maya Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 12
 
| {{GreenGunMG}}{{GreenGunMG}}{{Radar}}
 
| +4
 
| 1.25
 
| 45%
 
| All
 
| One of the machine guns must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 13
 
| style="text-align: center;" colspan="6"|'''Unused'''
 
|-
 
| 14
 
| {{GreenGunDP}}{{GreenGunMG}}{{Radar}}
 
| +5
 
| 1.45
 
| ??
 
| [[Isuzu|Isuzu Kai Ni]]
 
|
 
|-
 
| 15
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +4
 
| 1.3
 
| 58%?
 
| [[Isuzu|Isuzu Kai Ni]]
 
|
 
|-
 
| 16
 
| {{GreenGunDP}}{{GreenGunMG}}{{Radar}}
 
| +5
 
| 1.4
 
| ??
 
| [[Kasumi|Kasumi Kai Ni B]]
 
|
 
|-
 
| 17
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +3
 
| 1.25
 
| ??
 
| [[Kasumi|Kasumi Kai Ni B]]
 
|
 
|-
 
| 18
 
| {{GreenGunMG}}
 
| +3
 
| 1.2
 
| ??
 
| [[Satsuki|Satsuki Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 19
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +6
 
| 1.45
 
| ??
 
| [[Kinu|Kinu Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 20
 
| {{GreenGunMG}}
 
| +4
 
| 1.25
 
| ??
 
| [[Kinu|Kinu Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].<br>
 
The HA gun '''must not''' be a [[:Category:High-Angle + AA Fire Director|high-angle gun with built in AA fire directors.]]
 
|-
 
| 21
 
| {{GreenGunDP}}{{Radar}}
 
| +6
 
| 1.45
 
| ??
 
| [[Yura|Yura Kai Ni]]
 
|
 
|-
 
| 22
 
| {{GreenGunMG}}
 
| +3
 
| 1.2
 
| ??
 
| [[Fumizuki|Fumizuki Kai Ni]]
 
| The machine gun must be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 23
 
| {{GreenGunMG}}
 
| +2
 
| 1.05
 
| ??
 
| [[Luigi Torelli|UIT-25 and I-504]]
 
| The machine gun '''must not''' be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 24
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +4
 
| 1.25
 
| ??
 
| [[Tatsuta|Tatsuta Kai Ni]]
 
| The machine gun '''must not''' be a [[:Category:Special MG|special machine gun]].
 
|-
 
| 25
 
| {{GreenGunMG}}{{Radar}}{{GreenAmmo}}
 
| +8
 
| 1.55
 
| ??
 
| [[:Category:Ise_Class|Ise-class Kai]]
 
| The machine gun must be a [[12cm 30 Tube Rocket Launcher Kai 2]].
 
|-
 
| 26
 
| {{GreenGunDP}}{{Radar}}
 
| +7
 
| 1.4
 
| ??
 
| [[Musashi|Musashi Kai Ni]]
 
| The HA gun must be a [[10cm Twin High-angle Gun Mount Kai + Additional Machine Guns]].
 
|-
 
| 27
 
| style="text-align: center;" colspan="6"|'''Unused'''
 
|-
 
| 28
 
| {{GreenGunMG}}{{Radar}}
 
| +5
 
| 1.4
 
| ??
 
| [[:Category:Ise_Class|Ise-class Kai/Kai Ni]] and [[Musashi|Musashi Kai/Kai Ni]]
 
| The machine gun must be a [[12cm 30 Tube Rocket Launcher Kai 2]].
 
|-
 
| 29
 
| {{GreenGunDP}}{{Radar}}
 
| +6
 
| 1.55
 
| ??
 
| [[Hamakaze|Hamakaze B Kai]] and [[Isokaze|Isokaze B Kai]]
 
| Using [[:Category:High-Angle + AA Fire Director|high-angle guns with built in AA fire directors]] will have a high chance of triggering API 5 and 8.
 
|-
 
| 30
 
| {{GreenGunDP}}{{GreenGunDP}}{{GreenGunDP}}
 
| +4
 
| 1.3
 
| ??
 
| [[Tenryuu|Tenryuu Kai Ni]]
 
|
 
|-
 
| 31
 
| {{GreenGunDP}}{{GreenGunDP}}
 
| +3
 
| 1.2
 
| ??
 
| [[Tenryuu|Tenryuu Kai Ni]]
 
|
 
|-
 
| 32
 
| {{GreenGunMG}}{{RedGunHeavy}}<br>
 
{{GreenGunMG}}{{GreenGunMG}}
 
| +4
 
| 1.2
 
| ??
 
| [[:Category:Royal_Navy_Vessels|Royal Navy ships]] and [[:Category:Kongou Class|Kongou-class Kai Ni]]
 
| Only applies to combinations of [[16inch Mk.I Triple Gun Mount Kai + FCR Type 284]] OR [[20 Tube 7 Inch UP Rocket Launcher]] and [[QF 2-pounder Octuple "Pom Pom" Naval Gun Mount]].
 
|-
 
| 33
 
| {{GreenGunDP}}{{GreenGunMG}}
 
| +4
 
| 1.35
 
| ??
 
| [[Gotland|Gotland Kai]]
 
|
 
|-
 
| 34
 
| {{GreenGunDP}}{{GreenGunDP}}
 
| +8
 
| 1.1.6
 
| ??
 
| [[:Category:Fletcher Class|Fletcher-class]]
 
| Both HA guns must be [[5inch Naval Gun Mk.30 Kai + GFCS Mk.37]]s.<ref>The 5inch+GFCS can substitute for the regular 5inch Kai in all Fletcher-class AACI.</ref>
 
|-
 
| 35
 
| {{GreenGunDP}}{{GreenGunDP}}
 
| +7
 
| 1.55
 
| ??
 
| [[:Category:Fletcher Class|Fletcher-class]]
 
| One HA gun must be [[5inch Naval Gun Mk.30 Kai + GFCS Mk.37]] and the other must be [[5inch Naval Gun Mk.30 Kai]].
 
|-
 
| 36
 
| {{GreenGunDP}}{{GreenGunDP}}{{Radar}}
 
| +7
 
| 1.55
 
| ??
 
| [[:Category:Fletcher Class|Fletcher-class]]
 
| The HA guns must be [[5inch Naval Gun Mk.30 Kai]] and the radar must be [[GFCS Mk.37]]
 
|-
 
| 37
 
| {{GreenGunDP}}{{GreenGunDP}}
 
| +5
 
| 1.45
 
| ??
 
| [[:Category:Fletcher Class|Fletcher-class]]
 
| Both HA guns must be [[5inch Naval Gun Mk.30 Kai]].
 
|-
 
|}<references/>
 
{{clear}}
 
 
 
'''Important Notes'''
 
* Except API 1/2, only radars with an {{AA}} stat can trigger AACI. 
 
* If a ship fulfills multiple AACI requirements, '''the lowest API number will be triggered'''.
 
** Only a single roll is done to determine if AACI triggers.
 
** This means that an AACI with lower priority but higher trigger chance can activate when a higher priority AACI fails the roll.
 
** The exceptions where a ship can possibly trigger either AACI are: 
 
*** 7 and 8 
 
*** 19 and 20; and 8 and 20 for Kinu
 
*** 5 and 29 for Isokaze and Hamakaze
 
** The exception to this is the Fletcher-class AACI where the game will make multiple rolls to check each AACI in ascending order.
 
*** This makes the Fletcher-class AACI the most reliable AACI in the game.
 
* If multiple ships manage to activate AACI, '''the highest API number will be triggered'''.
 
** This means you need to be careful that the powerful AACI in your fleet are not being overridden by worse AACI.
 
* AACI '''will not''' change the determined air control state. It only affects the bombers in the airstrike phase.
 
 
 
===AACI Equipment Setups===
 
Below are recommended equipment setups for anti-air cut-ins. If an AACI type is not listed, it means that it is subpar and not worth considering. The order of the equipment is for illustrative purposes only. It does not matter what order the equipment are in.
 
 
 
{| class="wikitable" style="width: 100%;"
 
|-
 
!style="text-align: center; border-radius: 6px 6px 0 0; border-style: solid; border-width: 1px; background-color:#99CCFF; width:20%;" colspan="3"| Battleships
 
|-
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF; width:20%;"| '''Equipment Setup'''
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF; width:20%;"| '''AACI Type'''
 
!style="text-align: center; border-style: solid; border-width: 1px; background-color:#99CCFF; width:60%;"| '''Notes'''
 
|-
 
|{{GreenGunDP}}{{Radar}}
 
|28
 
|This is the standard setup for all battleships. It allows you to perform both the powerful AP cut-in and a double attack as backup. For battleships with 5 slots, the last equipment must not be a secondary gun or radar.
 
|-
 
|{{RedGunHeavy}}{{RedGunHeavy}}{{Seaplane}}{{GreenAmmo}}
 
|Double Attack
 
|This is reserved for anti-installation work. It will reduce a battleship's effectiveness against surface targets so keep that in mind when using this setup.
 
|-
 
|{{RedGunHeavy}}{{RedGunHeavy}}{{Seaplane}}{{RedAmmo}}{{Radar}}'''<'''{{GreenGunDP}}'''>'''
 
|Main/Main Cut-In<br>
 
Main/AP Cut-In<br>
 
Main/RADAR Cut-In<br>
 
Main/Secondary Cut-In<br>
 
Double Attack
 
|This setup is exclusive to [[Musashi|Musashi Kai Ni]] when she has the [[10cm Twin High-angle Gun Mount Kai + Additional Machine Guns]] equipped in her reinforcement expansion and an anti-air radar. This setup is to allow her to perform her special AACI.
 
|-
 
|}
 

Latest revision as of 16:40, 22 June 2021