View source for Summer 2024 Event/E-4

{{:{{ROOTPAGENAME}}/Hub}}
{{EventInfoBox
|title_en= Biak Island Engagement
|title_jp= ビアク沖遭遇戦
|tag= [[File:{{ROOTPAGENAME}} Tag 5.png]]
|tag2= [[File:{{ROOTPAGENAME}} Tag 6.png]]
|header_thumb=[[File:{{ROOTPAGENAME}} E-4 Boss Thumb.png]]
|tag_text= {{Shiplock|{{ROOTPAGENAME}} Tag 5}} '''Operation Kon Fleet'''<br>{{Shiplock|{{ROOTPAGENAME}} Tag 6}} '''Operation Kon Reinforcement'''
|map_1=[[File:{{ROOTPAGENAME}} E-4 Map Phase 3.png|450px]]
|map_1_text=Map
|map_2=[[File:{{ROOTPAGENAME}} E-4 Map Phase 1.png|450px]]
|map_2_text=Phase 1
|map_3=[[File:{{ROOTPAGENAME}} E-4 Map Phase 2.png|450px]]
|map_3_text=Phase 2
|map_4=[[File:{{ROOTPAGENAME}} E-4 Map Phase 2.5.png|450px]]
|map_4_text=Phase 2.5
|map_5=[[File:{{ROOTPAGENAME}} E-4 Map Phase 3.png|450px]]
|map_5_text=Phase 3
|map_6=[[File:{{ROOTPAGENAME}} E-4 Map LBAS Range 1.png|450px]]
|map_6_text=LBAS 1
|map_7=[[File:{{ROOTPAGENAME}} E-4 Map LBAS Range 2.png|450px]]
|map_7_text=LBAS 2
|boss_hard= 4750 HP + 700 TP + 5880 HP
|boss_medium= 4750 HP + 600 TP + 5880 HP
|boss_easy= 4750 HP + 550 TP + 5390 HP
|boss_casual= 4750 HP + 500 TP + 5390 HP
|phase_1_boss= {{EnemyLink|New Southern Battleship Princess}}
|phase_2_boss= {{EnemyLink|Abyssal Stranded Landing Princess}}
|phase_3_boss= {{EnemyLink|New Battleship Princess}}
|rewards = E-4
}}

{{center|[[File:{{ROOTPAGENAME}} E-4 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-4 Branching Rules (Start Points) ▼/▲
|id = 59-4a
|0 -> 1 = * Single Fleet
* [[File:Summer_2024_Event_Tag_5.png]] Operation Kon Fleet  only ('''Normal / Hard''')
|0 -> 2 = * Combined Fleet
* [[File:Summer_2024_Event_Tag_6.png]] Operation Kon Reinforcement only ('''Normal / Hard''')
}}

{{MapBranchingTable
|title = E-4 Branching Rules (Start Point 1) ▼/▲
|id = 59-4b
|order = 1,A2,D,F,G,C,I,J,M,Q
|1 -> A/battle = * Meet '''ALL''' of the following requirements:
** Amount of SS(V) = 0
** Amount of DD ≥ 2
** If Slow Fleet:
*** Amount of (F)BB(V) = 0
*** Amount of CV(B/L) + Akitsu Maru ≤ 1
*** Amount of CL ≥ 1
|1 -> A1/red/darkblue = * Does not meet the requirements to go to A
|A2/empty -> B/battle, C/battle = Active Branching
|D/empty -> E/battle, F/pink = Active Branching
|F/pink -> F1/battle = * Pass the LoS check
|F/pink -> F2/empty = * Fail the LoS check
|G/pink -> H/battle = * Pass the LoS check
|G/pink -> K/empty = * Fail the LoS check
|C/battle -> I/pink = * Does not meet the requirements to go to L or M
|C/battle -> L/battle = * Meet '''ALL''' the following requirements:
** Amount of (F)BB(V) + CV(B) ≤ 2
** Amount of CV(B) ≤ 1
** Amount of CV(B/L) ≤ 2
** Amount of DD ≥ 2
** Pass the LoS check
** Does not meet the requirements to go to M
|C/battle -> M/empty = * Route to M is unlocked
* Meet '''ALL''' of the following requirements:
** Amount of CV(B) ≤ 1
** Fleet contains 1CL/AV 2DD '''OR''' 3DD
** If Striking Force Fleet, then amount of (F)BB(V) = 0
** If Single Fleet (6 ships), then amount of (F)BB(V) ≤ 1
** If amount of (F)BB(V) = 1, then amount of CL ≥ 1
|I/pink -> J/battle = * Does not meet the requirements to go to L
|I/pink -> L/battle = * Meet '''ALL''' of the following requirements:
** Amount of Yamato class ships ≤ ?
** Amount of CV(B) ≤ 1
** Pass the Los check
|J/battle -> K/empty = * ???
* Fail the Los check
|J/battle -> L/battle = * ???
* Pass the Los check
|M/empty -> N/red/darkblue = * Does not meet the requirements to go to O
|M/empty -> O/pink = * Meet '''ALL''' of the following requirements:
** Amount of CV(B) = 0
** Amount of CVL ≤ 1
** Fleet contains at least 1CL 2DD '''OR''' 4DD
|Q/resource -> R/empty =  * Fail the LoS check
|Q/resource -> S/battle = * Pass the LoS check (Cn3 = 53~58 '''Hard''')
}}

{{MapBranchingTable
|title = E-4 Branching Rules (Start Point 2) ▼/▲
|id = 59-4c
|order = T,W,X
|T/empty -> T1/red/darkblue = * Does not meet the requirements to go to T2
|T/empty -> T2/battle = * '''Force''' T2, if Fast+ Fleet
* Otherwise, meet '''ALL''' of the following requirements:
** Amount of (F)BB(V) ≤ 3
** Amount of CV(B) ≤ 2
** Amount of CV(B/L) ≤ 3
** Amount of CL + DD ≥ 4
** Amount of SS(V) = 0
*** If Amount of AS ≥ 1, then amount of SS(V) ≤ 2?
** If Slow Fleet:
*** Amount of (F)BB(V) ≤ 2
*** Amount of CL ≥ 2
*** Amount of DD + DE ≥ 4
|W/battle -> X/pink = * Does not meet the requirements to go to Z
|W/battle -> Z/battle =  * Force '''Z''' if fleet is Fast+ and passes the LoS check
* Otherwise, meet '''ALL''' of the following requirements:
** Pass the LoS check
** Amount of (F)BB(V) ≤ 3
** Amount of (F)BB(V) + CV(B/L) ≤ 5
** Amount of Yamato class ships = 0
|X/pink -> K/empty = * Fail the LoS check
|X/pink -> Y/red/darkblue = * Does not meet the requirements to go to Z
* Pass the LoS check
|X/pink -> Z/battle = * Meet '''ALL''' of the following requirements:
** Pass the LoS check
** If Slow/Fast Fleet, then amount of (F)BB(V) ≤ 4
** Amount of Yamato class ships ≤ 1
*** If Fast+, then amount of Yamato class ships ≤ 4*
}}
<nowiki>*</nowiki> = Rule under review

? = Ship type/amount under review

Branching compositions are reported over the course of the event. 
*Please refer to [https://tsunkit.net/nav/#/ KCNav] for up to date map content (fleets used, LoS/speed requirements/drops/LBAS ranges, ...)

{{clear}}

==Historical Bonuses==
{{/Historical_Bonuses}}

==Map Overview==
E4 is a striking force, and combined fleet three-phase map, consisting of one transport and two boss phases. 
* 3 [[LBAS]] are available to sortie on this map.
**After Phase 2, the LBAS is relocated closer to the final boss.

* This map uses 2 locks:
** [[File:{{ROOTPAGENAME}} Tag 5.png|40px]] '''Operation Kon Fleet''', Starting point 1 (striking),
** [[File:{{ROOTPAGENAME}} Tag 6.png|40px]] '''Operation Kon Reinforcement''', Starting point 2 (combined).

{{imbox|type=content|textstyle=color:red|text='''''This map is extremely hard to clear on all difficulties.<br>Please wait for information regarding compositions, historical bonuses, and friendly fleets across the event before starting it.<br>Especially in higher difficulties, advanced and exotic strategies are required and may not be available to most players.'''''}}

==Phase 1 - Boss==
"Eliminate the Enemy off the coast of Morotai"

<tabber>
|-|Light=
* Striking Force: '''1 FBB, 1 CV, 0-1 CA(V)/CLT, 1 CL, 3-4 DD, Fast [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|C|red|L|red}}

|-|Heavy=
* Striking Force: '''2 FBB, 1 CVL, 1 CA(V)/CLT, 1 CL, 2 DD, Fast [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|C|red|L|red}}

</tabber>
* LoS check: Casual/Easy/Med/Hard = '''Cn3 34/45/60/50'''
* LBAS range: 4
* Bringing 1 or 2 [[OASW]] is recommended to clear the SS on LD.
* The use of several [[Night Cut-in]]s is required to kill the boss. 
* Bringing [[AACI]] may help in the case the LBAS does not reliably clear the CVL.
* Boss Support is recommended to help finish the boss off, especially on LD.

{|class="wikitable"
![[New Southern Battleship Princess]]
|-
|<gallery>
Enemy Full New Southern Battleship Princess.png|Regular
Enemy Full New Southern Battleship Princess Damaged.png|Last Dance
</gallery>
|}

==Phase 2 - TP==
Phase 2 is a '''"[[Transport Operation]]"''': "Supply Transport to Sorong"

<tabber>
|-|Light (Striking)=
* Striking Force: '''1 CL, 4-6 DD, 0-1 AV [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|C|red|M|blue|O|pink|P|red|Q|green|S|red}}

|-|Heavy (Striking)=
* Striking Force: '''1 CVL, 1 CA(V)/AV, 1 CL, 4 DD [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|C|red|M|blue|O|pink|P|red|Q|green|S|red}}

|-|Lock Medium (Single)=
* Single: '''1 FBB, 1 CVL, 0-1 CA(V), 1 CL, 2-3 DD [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|C|red|M|blue|O|pink|P|red|Q|green|S|red}}
**This fleet has the advantage of being a single fleet and reusing more staged ships from the previous phase.

</tabber>
* LoS check: ?
* LBAS range: 6
*Using the {{IconText|{{CommandFacility}}|SFFCF}} {{Equipment/Link|Striking Force Fleet Command Facility|text=SFFCF}} can help increase the reach rate.
* Bringing [[ASW]] and [[AACI]] is recommended.
* The pre-boss node contains several [[PT boat]]s:
{{Anti-PT boat}}


''After clearing this phase, the [[LBAS]] is relocated closer to the final boss.

==Phase 2.5 - Gimmick==
"Unlock the Boss Node at Biak"

To unlock the last boss, the following steps have to be performed:

{|class="wikitable" 
! !! E!! H!! V
|-
| Hard|| S|| S x2|| S x3
|-
| Medium|| -|| A+ x2|| A+ x3
|-
| Easy|| -|| A+ x2 || A+ x2
|-
| Casual|| -|| A+ x2|| A+ x2
|}

<tabber>
|-|Nodes E=
* Striking Force: '''1-2 FBB, 0-1 CV, 1-2 CVL, 1 CL, 2-3 DD [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|B|red|D|blue|E|red}}
*LoS check: ?
*LBAS range: 6

* To secure the win condition for each difficulty, it is recommended that you run 2 FBB/CVL and 1-2 historical DD.
* Bringing [[Node Support]] is recommended to ensure S rank, especially on Hard.
* Using the {{IconText|{{CommandFacility}}|SFFCF}} {{Equipment/Link|Striking Force Fleet Command Facility|text=SFFCF}} can help increase the reach rate.
* Using the vanguard formation will help pass through the on-route nodes. 

|-|Nodes H=
* Striking Force: '''1-2 FBB, 0-1 CV, 1-2 CVL, 1 CL, 2-3 DD, Fast [[File:{{ROOTPAGENAME}} Tag 5.png|30px]]
* Route: {{MapRoute|1||A|red|A2|blue|B|red|D|blue|F|pink|F1|red|G|pink|H|red}}
*LoS check: ?
*LBAS range: 7

* It is recommended to run 2 FBB/CVL and 1-2 historical DD to secure the win condition for each difficulty.
** It is also possible to send LBAS to {{MapRoute|F1|red}} if the node is causing retreats. 
* Bringing [[Node Support]] is recommended to ensure S rank especially on Hard.
* Using the {{IconText|{{CommandFacility}}|SFFCF}} {{Equipment/Link|Striking Force Fleet Command Facility|text=SFFCF}} can help increase the reach rate.
* Using the vanguard formation will help pass through the on-route nodes. 

|-|Node V=
* Refer to [[#Phase 3 - Boss]]'s fleet for composition and routing.
*LBAS range: 3
</tabber>

==Phase 3 - Boss==
"Biak Island Engagement"

{{TextGlow|'''Note'''|black|text-colour=red|glow-size=2px}}: This phase is incredibly hard and there is no known reliable way to defeat it.
*The following recommended fleets require advanced equipment, ships, and the use of as many historical ships as possible.
*The use of [[Special Attack]]s is mandatory.
*Using an STF is recommended over the CTF.
*Doing the [[#Phase 3.5 - Debuff|debuff]] is highly recommended.

<tabber>
|-|Heavy STF=
* STF: [[File:{{ROOTPAGENAME}} Tag 6.png|30px]]
**Main: '''2 (F)BB(V), 1 CV, 1 CAV, 1 CL, 1 AO/LHA
**Escort: '''1 CA(V)/CLT, 1 CL, 4 DD
* Route: {{MapRoute|2||T|blue|T2|red|U|purple|U1|pink|U2|blue|V|red|W|red|X|pink|Y|orange|Z|red}}
*Longest route, but strongest fleet.
**Passes through the {{MapRoute|Y|orange}} ASS node.
*This fleet can be slow, even when using both {{Class|Yamato}}.
*It is recommended to try to reach AS on the boss.
*It is recommended to use an {{Supplies}} {{EquipmentLink|Underway Replenishment}} to reduce penalties.
**The AO/LHA should be either [[Kumano Maru Kai]]/[[Yamashio Maru Kai]] for fighter power, or [[Souya]] for [[Smoke]]s.
*The 1 CV + 1 CAV can be replaced with 2 CVL.
*It is possible to replace the CAV with a BB(V) (notably for fighter mule), but this will pass through an extra air raid {{MapRoute|T1|orange}}

|-|STF F+=
* STF: '''Fast+''' [[File:{{ROOTPAGENAME}} Tag 6.png|30px]]
**Main: '''4 (F)BB(V), 2 CVL
**Escort: '''2 FBB, 1 CL, 2 DD, 1 SS
* Route: {{MapRoute|2||T|blue|T2|red|U|purple|U1|pink|U2|blue|V|red|W|red|Z|red}}
*Shortest route 
*This fleet must be '''Fast+''' when using both {{Class|Yamato}} (''see [[Speed]]'').
**The SS must be a {{Type|Sentaka Type}} to be able to reach F+.
*This fleet should utilize a double touch, with a Kongou-class touch in the escort.

|-|CTF F+=
* CTF: '''Fast(+)''' [[File:{{ROOTPAGENAME}} Tag 6.png|30px]]
**Main: '''2 (F)BB(V), 3-4 CV, 0-1 CVL, 0-1 CAV
**Escort: '''2 FBB, 1 CA(V), 1 CL, 2 DD
* Route: {{MapRoute|2||T|blue|T2|red|U|purple|U1|pink|U2|blue|V|red|W|red|Z|red}}
*Shortest route
*This fleet must be '''Fast+''' when using both {{Class|Yamato}} (''see [[Speed]]'').
*This fleet should utilize a double touch, with a Kongou-class touch in the escort.

|-|Light CTF=
* CTF: '''Fast(+)''' [[File:{{ROOTPAGENAME}} Tag 6.png|30px]]
**Main: '''2 (F)BB(V), 2 CV, 1 CVL, 1 DD
**Escort: '''1 CA(V), 1 CL, 3 DD, 1 SS
* Route: {{MapRoute|2||T|blue|T2|red|U|purple|U1|pink|U2|blue|V|red|W|red|Z|red}}
*Shortest route 
*This fleet must be '''Fast+''' when using both {{Class|Yamato}} (''see [[Speed]]'').
**The SS must be a {{Type|Sentaka Type}} to be able to reach F+.
** If the fleet is not Fast+:
*** No {{Class|Yamato}} can be included
*** An AS must be included with the SS to skip {{MapRoute|T1|orange}}

|-|Light STF Short=
* STF: '''Fast(+)''' [[File:{{ROOTPAGENAME}} Tag 6.png|30px]]
**Main: '''4 (F)BB(V), 1-2 CVL, 0-1 AS
**Escort: '''1 CA(V), 1 CL, 3 DD, 1 SS
* Route: {{MapRoute|2||T|blue|T2|red|U|purple|U1|pink|U2|blue|V|red|W|red|Z|red}}
*Shortest route 
*This fleet must be '''Fast+''' when using both {{Class|Yamato}} (''see [[Speed]]'').
**The SS must be a {{Type|Sentaka Type}} to be able to reach F+.
** If the fleet is not Fast+:
*** No {{Class|Yamato}} can be included
*** An AS must be included with the SS to skip {{MapRoute|T1|orange}}
</tabber>

* LoS check: Casual/Easy/Medium/Hard = '''Cn3 ~90/85/95/110'''
* LBAS range: 6

* Bringing several [[OASW]] is recommended.
** Bringing an [[AACI]] is recommended if possible, but of a lesser significance if unavailable.
*Using CV(L)/CAV/AO/LHA as fighter mules to reach AS on the boss is recommended.
* Usage of both Node and Boss Support is needed to kill off smaller ships allowing your fleet to target bigger ships. 

* Node {{MapRoute|U|purple}} is a night battle filled with [[PT boat]]s, requiring anti-PT setups for escort fleet,
**The formation should be {{ToolTip|[[Vanguard]]|[[File:Vanguard.png]]}}.
{{Anti-PT boat}}

*Using high level {{Smoke}} [[Smoke]]s is recommended to pass through node {{MapRoute|Y|orange}}.
* The [[Special Attacks#Yamato_Special_Attacks|Yamato Touch]] is the best recommended special attack.
* Including an SS in most fleets is recommended to take advantage of sub-tanking.

*It is recommended to send an ASW LBAS on node {{MapRoute|T2|red}}, and sending each of the other LBAS on nodes {{MapRoute|V|red|W|red}}.

==Phase 3.5 - Debuff==
Once LD has been reached, the following steps have to be performed to debuff the boss.
*Doing the debuff is extremely recommended.
*Do note that for the first time, debuff effects are different between difficulties, being greater in Hard notably.

{|class="wikitable" 
! !! L!! H!! S!! X!! LBAS
|-
| Hard|| S|| S|| S|| AS x2||AS x2
|-
| Medium|| S|| A+|| A+|| -|| AS x2
|-
| Easy|| A+|| A+|| A+|| -|| AS
|-
| Casual|| A+|| A+|| A+|| -|| -
|}

<tabber>
|-|Node L=
* Refer to [[#Phase 1 - Boss]]'s fleet for composition and routing.
* LBAS range: 4

|-|Node H=
* Refer to [[#Phase 2.5 - Gimmick]]'s fleet for composition and routing.
* LBAS range: 7

|-|Node S=
* Refer to [[#Phase 2 - TP]]'s fleet for composition and routing.
* LBAS range: 3

|-|Node X=
* Refer to [[#Phase 3 - Boss]]'s fleet for composition and routing.
* LBAS range: 5

{|class="wikitable" 
! !! AS
|-
| Hard|| 630
|-
| Medium|| ?
|-
| Easy|| 600
|-
| Casual|| 312
|}

|-|LBAS=
{|class="wikitable" 
! !! AS
|-
| Hard|| 725
|-
| Medium|| 639
|-
| Easy|| 582
|-
| Casual|| 468
|}

</tabber>

Once on LD, the CG will change to the following:
{|class="wikitable"
![[New Battleship Princess]]
|-
|<gallery>
Enemy Full New Battleship Princess.png|Regular
Enemy Full New Battleship Princess Damaged.png|Last Dance
Enemy Full New Battleship Princess Damaged Debuffed.png|Debuffed
</gallery>
|}

==Enemy Compositions==
{{/Enemy comps}}
==Ship Drops==
{{/Ship drops}}
{{clear}}
{{:{{ROOTPAGENAME}}/Hub}}


==Trivia==
*Starting Point 1 is from the Gulf of Davao. Davao was a major city and port in the southern island of Mindanao in the Philippines. It was one of the first cities to be attacked during the December 7, 1941 multi-target strike of the Japanese forces and one of the first major cities to fall to Japanese control in WW2. It became a staging ground for Japanese operations to Borneo, Philippine Sea, and the Marianas. 
*Starting Point 2 is from Tawi-Tawi. During WW2 it is the location of the Tawi-Tawi Naval Base of the Japanese Forces and was a major launch point for operations going into the Southern Pacific.
*Node L is off the coast of Morotai
*Node S is north of West Papua
*Node Q is in Sorong. This was occupied by the Japanese in 1942 and was the staging ground of the Japanese forces for their Western New Guinea campaign. 
*Node Z is off the coast of Biak. This was also the site of the Battle of Biak during Operation Kon. This was a landing operation by the Japanese forces that was thwarted by the American defense forces.
*The first Airbase in the Mindanao area was the location of the Matina Airfield in Davao del Sur, Mindanao, Philippines. This was used by the IJN and was home to both the 153th Kokutai and 901st Hikotai.