Combat/Artillery Spotting

Artillery Spotting, commonly referred to as ArtySpot, Daytime CI, or simply Spotting, is a series of special attacks that allow ships with specific equipment setups to perform Cut-in attacks during the Day Battle. These attacks grant post-cap damage bonuses as well as increased shelling accuracy.

The Carrier-equivalent for Artillery Spotting is Aircraft Carrier Cut-in (CVCI). Mechanically, they share the same core mechanics, but have different trigger conditions.

Artillery Spotting

Artillery Spotting is a feature for ships that can launch Seaplanes. Using special equipment setups, those ships may perform one of multiple special attacks. These attacks are often referred to as Cut-ins due to the way the equipment is displayed in the screen before the attacks are performed. Particular Cut-ins are often referred to by their acronym, such as APCI for Main AP Shell Cut-in, Sec CI for Secondary Gun Cut-in, etc.

Cut-ins may be activated during a ship's turn and will override its normal shelling attack. Do note that the specific equipment being shown during the Cut-ins have no influence on the damage output.

Trigger Conditions

The fleet attains Air Supremacy. Artillery Spotting and Aircraft Carrier Cut-ins can now be performed

• The fleet must have attained Air Superiority (AS) or Air Supremacy (AS+) Air State.
  • For details on Air State, please refer to Aerial Combat - Stage 1
• The ship must be equipped with at least one ReconSeaplane Recon or BomberSeaplane Bomber on a slot with size higher than 0.
  • Seaplane Fighters or Reconnaissance Aircraft do not enable Artillery Spotting.
  • Main Suisei Cut-in specifically ignores this condition.
• The ship must be equipped with at least one Main Main Gun.
• The ship must target another ship and attack it with Surface Shelling.
  • ASW shelling has no Artillery Spotting setups.
• The ship must not be Heavily damaged (大破)

Setups and Attack Types

Musashi performing Main AP Shell Cut-in (APCI)

Different setups have different conditions, trigger rates, damage, and number of hits. Cut-ins are determined by the attack's prerequisites as well as the previously stated trigger conditions.

For a given Cut-in, any other equipment can be added on the remaining slots. Be wary that adding certain equipment may change the Cut-in that will be rolled. Meeting prerequisites for multiple Cut-ins grants each a chance to be activated: in this case, the Cut-ins will be rolled in order of priority from top to bottom.

For clarity purposes:

• is used to indicate a Main Gun of any size,
• is used to indicate a "Seaplane" (Recon or Bomber),
• is used to indicate a Secondary Gun of any size,
• is used to indicate an AP Shell,
• is used to indicate a Radar of any type,
• is used to indicate any "634 Air Group" Suiseis
  
  .
• is a custom icon used to indicate any Zuiun variant:

Zuiuns
Zuiun Zuiun (631 Air Group) Zuiun (634 Air Group) AAR Zuiun Model 12 AAR Zuiun Model 12 (634 Air Group) AAR Zuiun (634 Air Group/Skilled) AAR Zuiun Kai 2 (634 Air Group) AAR Zuiun Kai 2 (634 Air Group/Skilled) AAR Prototype Night Zuiun (Attack Equipment) AAR

Attack Type	Prerequisites	Post-cap Damage Modifier	Accuracy Modifier	Hits	Notes
Main Zuiun Cut-in (Zuiun CI)		1.35	?	1	Ise-class Kai Ni only
Main Suisei Cut-in (Suisei CI)		1.3	?	1
Main AP Shell Cut-in (APCI)		1.5	1.2	1
Secondary AP Shell Cut-in (Sec APCI)		1.3	1.3	1
Secondary Radar Cut-in (Radar CI)		1.2	1.5	1
Secondary Cut-in (Sec CI)		1.1	1.3	1
Double Attack (DA)		1.2	1.1	2

• If all rolls fail or the ship meets no Cut-in requirements, then it'll perform a Single Attack: a default 1 hit, no damage modifier shelling attack.
• If an Artillery Spotting attack is evaded, it will deal chip damage instead.
• If valid set-ups for both Suisei-CI and Zuiun-CI are used, only the Zuiun-CI may trigger.

Aircraft Carrier Cut-In

Aircraft Carrier Cut-in, or CVCI for short, is a feature for ships that can launch Carrier-based planes. Similar to Artillery Spotting, using special equipment setups, those ships may perform one of multiple special attacks.

CVCI may be activated during a ship's turn and will override its normal shelling attack.

Trigger Conditions

• The fleet must have attained Air Superiority (AS) or Air Supremacy (AS+) Air State.
  • For details on Air State, please refer to Aerial Combat - Stage 1
• The carrier must fulfill one of the equipment setups.
• The carrier must be shelling a surface ship.
  • Installations cannot be attacked by CVCI.

Setups and Attack Types

Zuihou performing Fighter-Bomber-Attacker Cut-in (FBA)

Different setups have different conditions, trigger rates, damage, and number of hits. Cut-ins are determined by the attack's prerequisites as well as the previous state trigger conditions.

For a given Cut-in, any other equipment can be added to the remaining slots. Be wary that adding certain equipment may change the Cut-in that will be rolled. Meeting prerequisites for multiple Cut-ins grants each a chance to be activated: in this case, the Cut-ins will be rolled in order of priority from top to bottom.

• is used to indicate a Torpedo Bomber. In the game, is referred to as Attacker.
• is used to indicate a Dive Bomber. In the game, is referred to as Bomber.
• is used to indicate a Fighter.

Attack Type	Prerequisites	Post-cap Damage Modifier	Accuracy Modifier	Hits
Fighter-Bomber-Attacker (FBA)		1.25	1.2~1.3?	1
Bomber-Bomber-Attacker (BBA)		1.2	1.2~1.3?	1
Bomber-Attacker (BA)		1.15	1.2~1.3?	1

• If all rolls fail or the ship meets no Cut-in requirements, then it'll perform a Single Attack: a default 1 hit, no damage modifier shelling attack.
• If a CVCI attack is evaded, it will deal chip damage instead.

Note: The Critical Damage modifier granted by Aircraft Proficiency works differently when performing a CVCI.

• Planes may be equipped in any order, but the plane in the First Slot is denominated the Captain (regardless of plane type), and grants bonuses based on whether or not it is present in the cut-in being performed.
  • 0.15 if the Captain is participating, 0 otherwise.
• Instead of adding the Aircraft Proficiency's Critical Damage modifiers, the average Critical Damage modifier of the participating planes is used instead.
  • 0 for no proficiency, up to ~0.106 if all participating planes are ❱❱ .

The final Critical Damage modifier is given by:

[math]\displaystyle{ \text{Critical}_\text{mod} = 1.5 \times \left(1 + \text{Proficiency}_\text{average bonus} + \text{Captain}_\text{bonus} \right) }[/math]

With a maximum value of ~1.884 (1.5 x ~1.256).

Trigger Rates

Artillery Spotting and Aircraft Carrier Cut-Ins share the same trigger rate formula. The chance of successfully rolling and triggering a cut-in is mainly affected by the Air State and the "raw LoS", as well as some other factors like the type of CI, the ship's luck, and the Recons/Bombers currently in the fleet.

Trigger Rates
Trigger rate	The chance for a ship to roll a cut-in and perform it is given by: [math]\displaystyle{ \text{Trigger %}_\text{Cut-in} = \dfrac{\text{Base}_\text{ship}}{\text{Base}_\text{attack}} \times 100 }[/math]
Base ship	[math]\displaystyle{ \text{Base}_\text{ship} = \left \lfloor 10 + \lfloor \sqrt{\text{Luck}} \rfloor + \text{Mod}_\text{AS1} + \text{Mod}_\text{Flag} + \left \lfloor \left( \text{LoS}_\text{Fleet} + \text{Mod}_\text{AS2} \times \text{LoS}_\text{Ship} \right) \right \rfloor \times \text{Mod}_\text{AS3} \right \rfloor }[/math] With [math]\displaystyle{ \text{Mod}_\text{ASx} }[/math] the Air State modifiers: Mod AS AS+ [math]\displaystyle{ \text{Mod}_\text{AS1} }[/math] 0 10 [math]\displaystyle{ \text{Mod}_\text{AS2} }[/math] 1.2 1.6 [math]\displaystyle{ \text{Mod}_\text{AS3} }[/math] 0.6 0.7 [math]\displaystyle{ \text{Mod}_\text{Flag} }[/math] being 15 if the ship is the flagship, 0 otherwise, [math]\displaystyle{ \text{LoS}_\text{Ship} }[/math] the Sum of the equipment's displayed base LoS values (excluding Visible Bonuses) on the attacking ship, [math]\displaystyle{ \text{LoS}_\text{Fleet} = \left \lfloor \sqrt{\text{Total}_\text{LoS}} + \frac{\text{Total}_\text{LoS}}{10} \right \rfloor }[/math] Where [math]\displaystyle{ \text{Total}_\text{LoS} = \sum^{\text{All ships}}\text{Base}_\text{LoS} + \sum^{\text{All Recons/Bombers}}\text{Equip}_\text{LoS} \times \lfloor\sqrt{\text{Plane}_\text{Count}}\rfloor }[/math] [math]\displaystyle{ \text{Base}_\text{LoS} }[/math] being the ships' base LoS value without any equipment, [math]\displaystyle{ \text{Equip}_\text{LoS} }[/math] being the displayed base LoS value of Recons/Bombers (excluding Visible Bonuses) currently in the fleet. [math]\displaystyle{ \text{Plane}_\text{Count} }[/math] being the count of each individual Recons/Bombers currently in the fleet.
Base attack	[math]\displaystyle{ \text{Base}_\text{attack} }[/math] is the "Value" used by each type of Cut-in: [math]\displaystyle{ \text{Base}_\text{attack} }[/math] Value % per Base Value Artillery Spotting Main Zuiun Cut-in 120 0.83% Main Suisei Cut-in 130 0.77% Main AP Shell Cut-in 150 0.66% Secondary AP Shell Cut-in 140 0.71% Secondary Radar Cut-in 130 0.77% Secondary Cut-in 120 0.83% Double Attack 130 0.77% Aircraft Carrier Cut-ins Fighter-Bomber-Attacker 125 0.86% Bomber-Bomber-Attacker 135 0.80% Bomber-Attacker 150 0.66%