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=Battle Opening Breakdown=
Battle Opening is one of the ''daytime combat'' intermediary phases, taking place immediately before the First shelling starts. In this phase, allied and enemy fleets launch attacks with the intent to disable or remove enemy targets before the combat proper starts. This grants either fleet substantial advantages by possibly disabling key ships on the opposing side.
Battle Opening has the following structure:
* Opening ASW Shelling (OASW)
* Opening Torpedo Salvo
In case neither fleets meet the requirements, the sub-phase will be skipped.
=Opening ASW Shelling (OASW)=
Commonly referred to as ''OASW (opening ASW)''. All eligible ships will perform a regular ASW Shelling attack, following range order in the same fashion as the First Shelling Phase. As these opening attacks happen before the Opening Torpedo Salvo, they may disable or even sink enemy submarines before they have a chance to attack.
OASW has the following trigger conditions:
* The ship must be able to perform ASW shelling.
* Meet their specific ASW stat threshold and requirements:
{|class="wikitable" style="width:1050px; text-align: center; margin-left: auto; margin-right: auto; vertical-align: middle;"
!style="width: 25%;"|OASW Ship
!ASW Stat Required
!Equipment Required
!Notes
|-
! Any Destroyer/Light Cruiser/Torpedo Cruiser/Fleet Oiler/Training Cruiser
| '''100+ ASW'''
| {{Sonar}} '''1 Sonar Equipped'''
| ASW Stat Required '''does''' include<br>[[Equipment_Bonuses|visible equipment bonuses]]
|-
! rowspan="2"| Any Coastal Defense Ship
| '''60+ ASW'''
| {{Sonar}} '''1 Sonar Equipped'''
|-
| '''75+ ASW'''
| Total of '''4+ ASW''' from equipment.
|ASW Stat Required '''does''' include<br>[[Equipment_Bonuses|visible equipment bonuses]]<br><br>[[Equipment_Bonuses|Visible equipment bonuses]] <br>don't count as equipment ASW.
|-
! {{Ship/Banner|Isuzu/Kai Ni|small=true}}<br />{{Ship/Banner|Tatsuta/Kai Ni|small=true}}<br />{{ItemStack|item={{Ship/Banner|Yuubari/Kai Ni D|small=true}}|text=Kai Ni D}}<br />{{Ship/Banner|Jervis/Kai|small=true}}<br />{{Ship/Banner|Janus/Kai|small=true}}<br />{{Ship/Banner|Fletcher|small=true}}<br />{{Ship/Banner|Johnston|small=true}}<br />{{Ship/Banner|Samuel B. Roberts/Kai|small=true}}
| '''Can OASW innately'''
| '''N/A'''
|-
! Any Light Aircraft Carrier<!--<br/>(Except {{ShipLink|Suzuya Carrier Kai Ni|text=Suzuya}}/{{ShipLink|Kumano Carrier Kai Ni|text=Kumano}}) NEEDS SOURCE-->
| '''50+ ASW'''
| {{Sonar}} '''+''' {{BluePlane}} {{ASWPlane}} {{Autogyro}}<br />'''SONAR''' + Any with '''7+ ASW'''
| rowspan=2 | ASW Stat Required '''does''' include<br>[[Equipment_Bonuses|visible equipment bonuses]]<br><br>[[Equipment_Bonuses|Visible equipment bonuses]] <br>don't count as equipment ASW.
|-
!rowspan="2"|{{Ship/Banner|Taiyou|small=true}}<br />{{Ship/Banner|Shinyou|small=true}}<br />{{Ship/Banner|Gambier Bay|small=true}}<br />{{ItemStack|item={{Ship/Banner|Zuihou/Kai Ni B|small=true}}|text=Kai Ni B}}<br />{{Ship/Banner|Ryuuhou/Kai Ni|small=true}}
| '''65+ ASW'''
| {{BluePlane}} {{ASWPlane}} {{Autogyro}}<br />Any with '''7+ ASW'''
|-
| '''100+ ASW'''
| {{Sonar}} '''+''' {{RedPlane}} {{BluePlane}} {{ASWPlane}} {{Autogyro}}<br />'''SONAR''' + Any Plane with '''1+ ASW'''
| ASW Stat Required '''does''' include<br>[[Equipment_Bonuses|visible equipment bonuses]]
|-
!{{Ship/Banner|Taiyou/Kai|small=true}}<br />{{Ship/Banner|Shinyou/Kai|small=true}}<br />{{ItemStack|item={{Ship/Banner|Kaga/Kai Ni Go|small=true}}|text=Kai Ni Go}}
| '''N/A'''
| {{RedPlane}} {{BluePlane}} {{ASWPlane}} {{Autogyro}}<br />Any Plane with '''1+ ASW'''
|-
!{{Ship/Banner|Hyuuga/Kai Ni|small=true}}
| '''N/A'''
| {{Autogyro}}{{Autogyro}}'''2 {{EquipmentLink|Ka Type Observation Autogyro|O Type Observation Autogyro Kai|O Type Observation Autogyro Kai Ni|text=Autogryos}}'''<br />-or-<br />{{Autogyro}}'''1 {{EquipmentLink|S-51J|S-51J Kai|text=Helicopter}}'''.
|-
!{{Ship/Banner|Shinshuu Maru/Kai|small=true}}<br>{{Ship/Banner|Fusou/Kai Ni|small=true}}<br>{{Ship/Banner|Yamashiro/Kai Ni|small=true}}
| '''100+ ASW'''
| {{Sonar}} '''+''' {{ItemStack|item={{Seaplane}}|text=Bomber|font-size = 9px|text-color = fff|glow-color = 000|text-position = right:0px;bottom:-12px}} {{Autogyro}}<br />'''SONAR''' + Seaplane Bomber or Autogyro.
|}
===Abyssals===
Abyssal ships do not follow these rules. The following may perform OASW unconditionally:
* [[Destroyer Ha-Class Late Model Elite]]
* [[Destroyer Ni-Class Late Model Elite]]
* [[Light Cruiser Tsu-Class Flagship]]
* [[Light Carrier Nu-Class]] (Elite III, Elite IV, all Kai Elite, all Kai Flagship)
* [[Ancient Destroyer Princess]] (all variants)
* [[Abyssal Kuriles Princess]] (all variants)
* [[Destroyer Forest Princess]] (Damaged variants unconfirmed)
Other abyssals cannot perform OASW.
=Opening Torpedo Salvo=
Commonly referred to as ''oTorp (opening torpedo)''. Eligible ships will fire an Opening Torpedo attack. This attack behaves similarly to the Closing Torpedo attack, with the difference that it will be launched regardless of the ship's damage state.
Opening Torpedo salvo has the following trigger conditions:
* If the ship is a Submarine, then it must have Lv.10 or higher.
** While other Abyssal ships are Lv.1, all Abyssal Submarines are Lv.50.
** Abyssal submarines have an additional requirement of being '''Elite''' or '''Flagship''' tier
* Otherwise, it must have a Midget Submarine equipped.
** This includes {{EquipmentLink|Type A Kouhyouteki}}, {{EquipmentLink|Type C Kouhyouteki}} and the {{EquipmentLink|Type D Kouhyouteki Kai (Kouryuu Kai)}} for the allied fleets, and {{EquipmentLink|Abyssal Cuttlefish Torpedo}} for the Abyssal fleets.
*** Other Abyssal equipment such as {{EquipmentLink|High-speed Abyssal Torpedo mod.2}}, despite being classified as Midget Submarine, do not enable Opening Torpedo
This phase follows the same rules as [[Combat/Day_Battle#Closing_Torpedo_Salvo|Closing Torpedo Salvo]], with some exceptions:
* Ships at Moderate or Heavy Damage can still fire torpedoes.
* If there are no surface ships on the opposing fleet, torpedoes will be shown targeting randomly chosen submarines. This however will never deal damage and will always display as a "miss".
After the Opening Torpedo Salvo, the Day Battle Shelling starts (if there are any remaining ships on either side left).
{{Mechanics}}
[[Category:Game Mechanics]]