View source for Early Spring 2023 Event/E-1

{{:{{ROOTPAGENAME}}/Hub}}
{{EventInfoBox
|title_en= Operation S21
|title_jp= S21作戦
|tag= [[File:{{ROOTPAGENAME}} Tag 1.png]]
|header_thumb=[[File:{{ROOTPAGENAME}} E-1 Boss Thumb.png]]
|tag_text= '''{{Shiplock|{{ROOTPAGENAME}} Tag 1}} '''Yokosuka Defence Squadron'''
|map_1=[[File:{{ROOTPAGENAME}} E-1 Map.png|450px]]
|map_1_text=Map
|map_2=[[File:{{ROOTPAGENAME}} E-1 Map Phase 0.5.png|450px]]
|map_2_text=Phase 0.5
|map_3=[[File:{{ROOTPAGENAME}} E-1 Map Phase 1.png|450px]]
|map_3_text=Phase 1
|map_4=[[File:{{ROOTPAGENAME}} E-1 Map.png|450px]]
|map_4_text=Phase 2
|map_5=[[File:{{ROOTPAGENAME}} E-1 Map LBAS Range.png|450px]]
|map_5_text=LBAS
|boss_hard= 470 HP + 1950 HP
|boss_medium= 280 HP + 540 HP
|boss_easy= 280 HP + 540 HP
|boss_casual= 280 HP + 390 HP
|phase_1_boss= {{EnemyLink|Light Carrier Nu-Class Kai Flagship}}
|phase_2_boss= {{EnemyLink|Submarine Princess Kai B Flagship IV}}
|rewards = E-1
}}

{{center|[[File:{{ROOTPAGENAME}} E-1 Ooyodo.png|440px]]}}

The event guides are to be constructed through the respective [[/Sandbox|Event map page guide sandbox]] and reviewed by editors before being approved here. 
*'''Do not update the guides through this page unless it is a minor fix.''' Please only update guides through their respective sandbox pages.

==Branching Table==
{{MapBranchingTable
|title = E-1 Branching Rules
|order = ???
|A/empty -> B, E/empty = Active Branching
|C/empty -> C1/pink, C3 = Active Branching
|C1/pink -> C2 = Pass the LoS check (Cn3=45 '''Hard''')
|C1/pink -> D/empty = Fail the LoS check
|C3 -> C1/pink = * Does not meet the requirements to go to O
* Pass the LoS check
|C3 -> O/empty = * Meet '''ALL''' of the following requirements:
** Amount of DE ≤ 2
** Pass the LoS check (Cn3=40~45 '''Hard''')
|C3 -> N/empty = Fail the LoS check
|F -> G/pink = * Does not meet the requirements to go to H
|F -> H/empty = *Meet '''ALL''' of the following requirements:
** Amount of (F)BB(V) ≤ ?
** Amount of CV(B) = 0
** Amount of CVL ≤ 2
** Meet '''ANY''' of the following requirements:
*** Amount of CL ≥ 1
*** Amount of DD+DE ≤ 4
*** Amount of ships ≤ 3 ?
|G/pink -> G1 = * Does not meet the requirements for G2
|G/pink -> G2 = * Meet '''ALL''' of the following requirements:
** Fast fleet
** Amount of CV(B) = 0
** Amount of DD ≥ 5
|H/empty -> H1, H2/red/darkorange = Active Branching
|H1 -> J = * Meet '''ANY''' of the following requirements:
** Amount of DD+DE ≥ 5
** Amount of DD+DE ≤ 1 ?
** Amount of (F)BB(V) ≥ 2
** Amount of LHA ≥ 1
** Amount of ships ≤ 3
** ???
|H1 -> H2/red/darkorange = * Does not meet the requirements to go to J
|H2/red/darkorange -> I/empty = * Node K is locked
* Fail the LoS check
|H2/red/darkorange -> K = * Node K is unlocked
* Pass the LoS check (Cn3=45 '''Hard''')
|K -> L = * Does not meet the requirements to go to M
|K -> M = * Meet '''ALL''' of the following requirements:
** Amount of DD+DE ≥ 2
** Pass the LoS check (Cn3=50 '''Hard''')
|P/red/darkorange -> S = * Meet '''ALL''' of the following requirements:
** Amount of DD+DE ≥ 3
** If slow, amount of CV = 0
** Pass the LoS check (Cn3=50 '''Hard''')
** ???
|P/red/darkorange -> Q/red/darkorange = * Does not meet the requirements to go to M
|Q/red/darkorange -> S = * Pass the LoS check
* ???
|Q/red/darkorange -> R = * Fail the LoS check
* ???
}}

Branching compositions were reported over the course of the event. ([https://bbs.nga.cn/read.php?pid=514129578 NGA] and [https://tsunkit.net/nav/#/ KCNav])

==Historical Bonuses==
{{/Historical_Ships}}

==Map Overview==
E-1 consists of 2 main phases and only allows the use of Single Fleets.
* This map uses 1 lock:
** [[File:{{ROOTPAGENAME}} Tag 1.png]] '''Yokosuka Defence Squadron'''
* 1 [[LBAS]] is available to sortie into this map
* A new node type is introduced in this map : 
**'''[[Early Spring 2023 Event#New Mechanics|"Airstrike Supported Battle" nodes]]''' on nodes {{MapRoute|H2|darkorange|P|darkorange|Q|darkorange}}.
* [[CT]] can be a good replacement for CL throughout the map.
** As numerous submarines are present on this map, CL/CT should be able to [[OASW]].

==Phase 0.5: Unlock the first Boss Node==
The following steps have to be performed to unlock the first boss:
{|class="wikitable" 
!       !! C2!! G2!! J
|-
| Hard  || S || S || S
|-
| Medium|| ? || A+ || A+
|-
| Easy  || A+|| A+|| A+
|-
| Casual|| A+|| -||A+
|}

<tabber>
|-|Node C2=
* Single Fleet: '''0-1CV(L)/CVE, 0-1CL/CT, 5-6DD/DE''' 
* Route: {{MapRoute|1||A|blue|B|red|C|blue|C1|pink|C2|red}}
** {{MapRoute|C2|red}} is a submarine node. [[ASW]] equipment should be used for S rank.
** An LBAS figher sweep can help pass the air node {{MapRoute|C1|pink}}.
** Bringing an [[AACI]] capable ship is recommended to pass through the air node. 
** There is an LOS check to reach the node
*** LOS: Cn4 = 32/45/49/65 for Casual/Easy/Medium/Hard

|-|Node G2=
* Single Fleet: '''0-1CV(L)/CVE, 5-6DD/DE''' 
* Route: {{MapRoute|1||A|blue|E|blue|F|red|G|pink|G2|red}}
** {{MapRoute|G2|red}} is a submarine node. [[ASW]] equipment should be used for S rank.
** A 5-6DD fleet ONLY will skip node {{MapRoute|G1|red}}.
*** Otherwise, an LBAS strike can help pass node {{MapRoute|G1|red}}.
** Bringing an [[AACI]] capable ship is recommended to pass through the air node. 

|-|Node J=
* Single Fleet: '''1CL/CT, 5DD/DE'''
* Route: {{MapRoute|1||A|blue|E|blue|F|red|H|blue|H1|pink|J|red}}
** {{MapRoute|J|red}} is a Submarine node. [[ASW]] equipment should be used for S rank.
** An LBAS figher sweep can help pass the air node {{MapRoute|H1|pink}}.
** Bringing an [[AACI]] capable ship is recommended to pass through the air node. 
</tabber>

==Phase 1 - Destroy the First Boss==
* {{MapRoute|H2|darkorange}} is the new "Airstrike Supported Battle" node.
** The CVL on the node is unkillable. 

<tabber>
|-|Light Fleet=
* Single Fleet: '''1CL/CT, 5DD/DE'''
* Route: {{MapRoute|1||A|blue|E|blue|F|red|H|blue|H2|darkorange|K|red|M|red}}
** Support Expedition may be needed in this case. 

|-|Heavy Fleet=
* Single Fleet: '''1CVL/CVE, 0-1CAV, 0-1CLT, 1CL/CT, 2-4DD/DE'''
* Route: {{MapRoute|1||A|blue|E|blue|F|red|H|blue|H2|darkorange|K|red|M|red}}
** Heaviest fleet possible for this node. 
</tabber>

* AD/AP = 89/177 on '''HARD'''
* LBAS Range = 7 to {{MapRoute|M|red}}.
* Bringing an [[AACI]] capable ship is recommended to pass through the "Airstrike Supported Battle" node.
* LOS: Cn4 = 32/45/49/65 for Casual/Easy/Medium/Hard

==Phase 2 - Submerge the Submarine Princess==
<tabber>
|-|Light Fleet=
* Single Fleet: '''1CV(L)/CVE, 0-1CLT, 1CL/CT, 3-4DD/DE'''
* Route: {{MapRoute|1||A|blue|B|red|C|blue|C3|red|O|blue|P|darkorange|S|red}}
**A light fleet, limited to ships previously used on this map.

|-|Heavy Fleet=
* Single Fleet: '''1FBB, 1CV(L)/CVE, 1CL/CT, 3-4DD/DE'''
* Route: {{MapRoute|1||A|blue|B|red|C|blue|C3|red|O|blue|P|darkorange|S|red}}
**A heavier fleet, allowing for a "[[Combat/Day Battle#Second Shelling Phase|Second Shelling Phase]]".
**The fleet can be "Slow".
</tabber>

*AD/AP = 89/177 for '''HARD'''
* LBAS Range = 2
* Fleet must contain at least 1CL/CT & 3DD.
* The enemy flagship is {{Enemy/Link|Submarine Princess Kai B Flagship|Submarine Princess Kai B Flagship II|Submarine Princess Kai B Flagship III|Submarine Princess Kai B Flagship IV|text=Submarine Princess}}.
** Bringing [[ASW]] equipment should be used to focus on killing the flagship, ignoring the other ships.
* The use of [[ASW aircraft]] in the LBAS is recommended if the ships struggle to kill the boss.
* Bringing an [[AACI]] capable ship is recommended to pass through the air node and for the boss.
* {{MapRoute|P|darkorange}} is the new "Airstrike Supported Battle" node.
* LOS: Cn4: 32/44/48/65 for Casual/Easy/Medium/Hard

==Enemy Compositions==
{{/Enemy comps}}
==Ship Drops==
{{/Ship drops}}
{{clear}}
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