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→Fleet Anti-Air Defense (new formula)
*Fighters {{GreenPlane}} are not subject to AA fire from ships.
*Fighters {{GreenPlane}} are not subject to AA fire from ships.
*The ship performing AA fire is not necessarily the same ship that the bomber will attack; the ship performing AA fire may not even be a surface ship.
*The ship performing AA fire is not necessarily the same ship that the bomber will attack; the ship performing AA fire may not even be a surface ship.
The defending ship's '''weighted anti-air value''' will be used in calculations for two types of anti-air shootdowns: ''percentage shootdown'' and ''fixed shootdown''.
The defending ship's '''weighted anti-air value''' and the fleet's total '''fleet anti-air value'''' are calculated and used in the formula for the two types of anti-air shootdowns: ''percentage shootdown'' and ''fixed shootdown''.
*Fleet anti-air value is only used in calculation for fixed shootdown.
*Both shootdowns have 50% chance to succeed; failing means no planes are shot down for that part of the calculation.
*Both shootdowns have 50% chance to succeed; failing means no planes are shot down for that part of the calculation.
*Percentage shootdown will be done prior to anti-air cut-in and fixed shootdown calculation.
*Percentage shootdown will be done prior to anti-air cut-in and fixed shootdown calculation.
''There was a bug causing the formation anti-air modifier and fleet anti-air bonus to not function; this was fixed on June 26, 2015.''<br>
''There was a bug causing the formation anti-air modifier and fleet anti-air bonus to not function; this was fixed on June 26, 2015.''<br>
For each ship, the formula for its weighted anti-air value is calculated as follows:
For each ship, the formula for its weighted anti-air value is calculated as follows:
|-
|-
! scope="col" style="text-align:center;" |Equipment Type
! scope="col" style="text-align:center;" |Equipment Type
! scope="col" style="text-align:center;" |Equipment Modifier
! scope="col" style="text-align:center;" |Equipment Multiplier
|-
|-
| High-Angle Gun Mount {{GreenGunDP}}<br>(Both Main and secondary)
| High-Angle Gun Mount {{GreenGunDP}}<br>(Both Main and secondary)
| Anti-Aircraft Fire Director {{AntiAircraftFireDirector}}
| Anti-Aircraft Fire Director {{AntiAircraftFireDirector}}
| style="text-align:center;" |x4
| style="text-align:center;" |x4
|}
The fleet's fleet anti-air value is calculated as follows:
<center><math>\text {Fleet Anti-Air Value} = \text {Floor( Formation Modifier} \times \sum^\text{All ships} \text{Ship's Fleet Anti-Air Bonus)} \times 2,</math></center>
where
<center><math>\text {Ship's Fleet Anti-Air Bonus} = \text {Floor( }\sum^\text{All equipment slots} \text {Equipment's Anti-Air Value} \times \text{Equipment Modifier )}</math></center>
The Formation Modifier and the Equipment Modifier are shown below:
{| class="wikitable"
|-
! scope="col" style="text-align:center;" |Formation
! scope="col" style="text-align:center;" |Formation Modifier
|-
| Line Ahead<br>Echelon<br>Line Abreast
| style="text-align:center;" |x0.77
|-
| Double Line
| style="text-align:center;" |x0.91
|-
| Diamond
| style="text-align:center;" |x1.2
|}
{| class="wikitable"
|-
! scope="col" style="text-align:center;" |Equipment Type
! scope="col" style="text-align:center;" |Equipment Modifier
|-
| High-Angle Gun Mount {{GreenGunDP}}<br>Anti-Aircraft Fire Director {{AntiAircraftFireDirector}}
| style="text-align:center;" |x0.35
|-
| All other guns {{RedGunLight}}{{RedGunMedium}}{{RedGunHeavy}}{{YellowGun}}<br>Autocannon {{GreenGunMG}}
| style="text-align:center;" |x6
|-
| Air RADAR {{Radar}}
| style="text-align:center;" |x0.4
|-
| [[Type 3 Shell]] {{GreenAmmo}}
| style="text-align:center;" |x0.6
|}
|}
Multipliers for equipment not listed are not confirmed at this time.
Multipliers for equipment not listed are not confirmed at this time.
<math>\text {Percentage Shootdown (in # of planes)} = \text{Floor(Weighted Anti-Air Value} \times 0.9 \text{)} \div 360 \times \text{Number of Planes in Slot}</math><br>
<math>\text {Fixed Shootdown (in # of planes)} = \text {Floor[(Weighted Anti-Air Value + Fleet Anti-Air Value)} \div 10 \text{]}</math>
<math>\text {Fixed Shootdown (in # of planes)} = \text {Floor(Weighted Anti-Air Value} \div 10 \text{)}</math>
====Example of shootdown calculation====
====Example of shootdown calculation====
[[Akizuki]] (Innate AA value of 116, equipped with two [[10cm Twin High-angle Mount + Anti-Aircraft Fire Director|10cm HA+FD *+6]] and an [[Type 13 Air RADAR Kai]]) is defending against [[Aircraft Carrier Princess]]'s torpedo bomber slot (with 56 planes). Ignoring all other contributing factors such as Anti-Air Cut-In, fighter combat, and bonus from other members in fleet,<br>
[[Akizuki]] (Innate AA value of 116, equipped with two [[10cm Twin High-angle Mount + Anti-Aircraft Fire Director|10cm HA+FD *+6]] and an [[Type 13 Air RADAR Kai]]) is defending against [[Aircraft Carrier Princess]]'s torpedo bomber slot (with 56 planes). Assuming the formation is Line Ahead and no other AA factors such as Anti-Air Cut-In, fighter combat, and bonus from other members in fleet,<br>
<math>\text {Akizuki's Weighted AA Value} = 116 + 4 \times (10 + 0.7 \times \sqrt{6} ) \times 2 + 3 \times 4 = 221</math><br>
<math>\text {Akizuki's Weighted AA Value} = 116 + 4 \times (10 + 0.7 \times \sqrt{6} ) \times 2 + 3 \times 4 = 221</math><br>
<math>\text {Akizuki's Fleet AA Bonus} = \text{Floor(} 10 \times 0.35 \times 2 + 4 \times 0.4 \text{)}= 8</math><br>
<math>\text {Fleet AA Value} = \text {Floor(} 0.77 \times 8 \text{)} \times 2 = 12</math>
Thus, the values for the shootdown are calculated as follows:<br>
Thus, the values for the shootdown are calculated as follows:<br>
<math>\text {Akizuki's percentage shootdown} = 221 \div 400 = 0.55 = 55 \%</math><br>
<math>\text {Akizuki's percentage shootdown} = 221 \times 0.9 \div 360 \times 56 = 30</math><br>
<math>\text {Akizuki's fixed shootdown} = \text{Floor(} 221 \div 10 \text{)} = 22</math><br>
<math>\text {Akizuki's fixed shootdown} = \text{Floor[(} 221 + 12 \text{)} \div 10 \text{]} = 23</math><br>
The shootdown takes place in the order of percentage, then fixed, then guaranteed, so there are 4 possible outcomes:
The shootdown takes place in the order of percentage, then fixed, then guaranteed, so there are 4 possible outcomes:
{| class="wikitable"
{| class="wikitable"
|-
|-
| Both Percentage and Fixed Shootdown
| Both Percentage and Fixed Shootdown
| style="text-align:center;" |56x50% (percentage) + 22 (fixed) + 1 (guaranteed)<br>= 30 + 22 + 1 = 53
| style="text-align:center;" |30 (percentage) + 23 (fixed) + 1 (guaranteed) = 54
| style="text-align:center;" |3
| style="text-align:center;" |2
|-
|-
| Percentage Shootdown Only
| Percentage Shootdown Only
| style="text-align:center;" |56x50% (percentage) + 1 (guaranteed)<br>= 30 + 1 = 31
| style="text-align:center;" |30 (percentage) + 1 (guaranteed) = 31
| style="text-align:center;" |25
| style="text-align:center;" |25
|-
|-
| Fixed Shootdown Only
| Fixed Shootdown Only
| style="text-align:center;" |22 (fixed) + 1 (guaranteed) = 23
| style="text-align:center;" |23 (fixed) + 1 (guaranteed) = 24
| style="text-align:center;" |33
| style="text-align:center;" |32
|-
|-
| Neither
| Neither