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Spring 2025 Event/E-3/Sandbox

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Sandbox Rules

This sandbox is to be used to construct an event guide for the above-mentioned event map. These guides are to all of the following requirements:

  • An overview of the map, including ship/equipment bonuses, Ship Locks, and special mechanics,
  • List of branching unlocking requirements (if there are multiple requirements, compositions for each path along with the below requirements will be needed to discuss the unlocking requirements in question),
  • A list of working compositions that work: (T=these must have possible alternatives for players who may or may not have all ships needed for a specific path),
    • The Paths said compositions will take (to explain each path the composition will/can take),
    • A summary or description of what kind of obstacles a composition will face.
  • A description of the boss node: what it consists of, and a descriptive guide on what the player should consider for a course of action to successfully win the battle,
  • Optional: Tips/guides to farm certain ships and/or resources (this can also require compositions, paths, and possible descriptions).

Editors are to construct their own version of the guide/part of the guide, and complete it in a timely fashion.

No editor is allowed to edit over other editors' work without the consent of the editor and his approval to do so.

Several versions will be constructed through this page and will be reviewed and approved by the staff/collaboration committee before being moved for the Spring 2025 Event, being reviewed and updated once more before it can be released.

Overall there should be 3 versions of the guide that have to be constructed, including: Preliminary > Polished > Finalized Guides

With each approval of each version of the guide, the said guide will be updated to the main page, and construction of the next version will begin.

All guides outside of the approved version will be removed and work will begin from the approved version to make it better for the next version until the finalized version is made.

Branching Table

E-3 Branching Rules ▼/▲
Nodes Rules
Start
1
  • Single Fleet
  • [Phase 2+] Amount of 104th Squadron tagged ships = 0 (Casual / Easy)
  • Spring 2025 Event Tag 3.png 5th Fleet tag only (Normal / Hard)
2
  • Single Fleet
  • At least 1 untagged ship or 104th Squadron tagged ship (Casual / Easy)
  • Spring 2025 Event Tag 1.png 104th Squadron tag only (Normal / Hard)
3
  • Combined Fleet
  • Spring 2025 Event Tag 4.png Combined Fleet tag only (Normal / Hard)


E-3 Branching Rules (Start Point 1) ▼/▲
Nodes Rules
A
B

Active Branching

C
B
B1
  • Does not meet the requirements to go to B2
B2
  • Meet ALL of the following requirements:
    • Amount of CVL = 0
    • Amount of DD ≥ 3
B2
B3

???

B4

???

C
D

Active Branching

E
D
D1
  • Does not meet the requirements to go to D3
D3
  • Meet ALL of the following requirements:
    • Amount of CVL = 0
    • Amount of historical 5th Fleet ships ≥ 0/2?/4/6
    • LoS check?
D1
D2
  • Fail the LoS check
D3
  • Pass the LoS check
E
B

???

E1
  • Fail the LoS check
E2
  • Pass the LoS check
  • Does not meet the requirements to go to F
F
  • Meet ALL of the following requirements:
    • Amount of CL ≥ 1
    • Amount of historical 5th Fleet ships ≥ 0/0/4/5 (Casual / Easy / Normal / Hard)
    • Amount of Artic Camouflage 0/0/1/3 (Casual / Easy / Normal / Hard)
    • Pass the LoS check
  • Notes:
    • Additional historical ships and Artic Camouflage appear to lower the LoS requirement
    • 6 ship fleet and Stiking Force Fleet appear to have different LoS requirements
F1
F2
  • Fail the LoS check
F3
  • Does not meet the requirements to go to G
  • Pass the LoS check
G
  • Meet ALL of the following requirements:
  • Amount of historical 5th Fleet ships ≥ 0/2/4/6 (Casual / Easy / Normal / Hard)
    • Amount of (F)BB(V) ≤ 1
    • Pass the LoS check
F3
G
  • Fixed Route

* = Rule under review

? = Ship type/amount under review

Historical Bonuses

DISCLAIMER: This information is based on user-submitted data and is subject to revisions as more data is gathered. Any version of the ship receives the bonus regardless of remodel.

Ship Bonuses

??

Equipment Bonuses

??

Debuff

??


XX's Guide

Map Overview

E3 is a single and combined fleet, three-phase map consisting of three boss phases.

  • 3 LBAS are available on this map:
    • Only 2 can be set on Sortie, the other being limited to Defense,
  • This map uses 3 locks:
    • Spring 2025 Event Tag 1.png 104th Squadron, Starting point 1 (reused from E-1)
    • Spring 2025 Event Tag 3.png 5th Fleet, Starting point 2 (reused from E-2)
    • Spring 2025 Event Tag 4.png Combined Fleet, Starting point 3

The use of Aviation PersonnelAGDP AGDPArctic Gear & Deck Personnel on CV(B/L), Ise-class Kai Ni, Akitsu Maru Kai, Kumano Maru, and Yamashio Maru, is required to sortie these ships on the map.

Gimmick 1 - Unlock

To unlock the 1st boss, the following steps have to be performed:

B4 D3 E2
Hard S x2 S x2 S x2
Medium ? ? ?
Easy ? ? ?
Casual ? ? ?
Node B4
Fleet Info
Single Striking: 0-1 FBB, 1-2 CA, 0-1 CLT, 1-2 CL, 4-5 DD Spring 2025 Event Tag 3.png
LoS Any
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
1 A B B2 B4
Air State (C / E / M / H)
AD AP AS AS+
0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0
LBAS
Range AS Sortie AS Defense
Node B4: 8 0 / 0 / 0 / 0 158 / 209 / 230 / 281
Fleet Notes
The enemy is a surface fleet.
  • PT Imp Packs and submarines are on the route, it is therefore advised to bring some ASW and anti-PT setups:
Anti-PT boat
Unlike most standard Abyssals, "PT boats" (PT Imp PackPT Imp Pack & Schnellboot Imp PackSchnellboot Imp Pack) are "very small and fast".
  • All ship types suffer a severe Accuracy accuracy and Firepower firepower penalty against PT boats.
  • Attacking them with larger guns is not very effective, smaller guns being recommended instead.
  • Support Expeditions are not affect by any of the following[1].
Attack formula against PT boats
The Attack formula against PT boats:[2][3]
Jet Assault & Airstrike
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.5 ; 0.8] }[/math]


LBAS[4]
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.4 ; 0.7] }[/math]


Shelling
  • [math]\displaystyle{ \text{Damage}_\text{PT}= ( 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 ) \times \prod^{All Equipment}{\text{Mod}_\text{EquipmentAtk}} }[/math]


Opening & Closing Torpedo Salvos
  • [math]\displaystyle{ \text{Damage}_\text{PT}= 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 }[/math]


Night Battle
  • Night Battle data are unclear yet.


With
  • [math]\displaystyle{ \text{Atk}_\text{post-cap} }[/math] the post cap attack power defined here,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math] the bonuses given by equipment, described below.
Accuracy formula against PT boats
The Accuracy formula against PT boats:[5][6][7][8]
[math]\displaystyle{ \text{Hit Rate}_\text{vs.PT} \text{%} = \Big\lfloor ( 0.3 \times \text{Accuracy}_\text{Atk} + \sqrt{\text{Accuracy}_\text{Atk}} + 15 ) \times 1.2 \times \text{Mod}_\text{Ship} \times \Big( \prod^{All Equipment}{\text{Mod}_\text{EquipmentAcc}} \Big) \times \text{Mod}_\text{Night} \Big\rfloor - \text{EVA}_\text{PT} + 1 }[/math]
With
  • [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math] the standard accuracy described here
    • PT boats are "DDs" in the game, so the [math]\displaystyle{ \text{Mod}_\text{formation} }[/math] for vanguard is 1.1 during shelling, and 1.2 during the torpedo phase.
    • Historical accuracy bonuses during Events are included in the Standard Accuracy Term, i.e. it is affected by the [math]\displaystyle{ \text{Mod}_\text{PT} }[/math] modifier.
  • [math]\displaystyle{ \text{EVA}_\text{PT} }[/math] the PT estimated evasion Evasion described bellow,
PT boats stats
Type Luck Luck Eva Evasion [math]\displaystyle{ \text{EVA}_\text{PT} }[/math]
Line AheadLineAhead.png EchelonEchelon.png Line AbreastLineAbreast.png
PT Imp PackPT Imp Pack ? ? 81? 87? ?
PT Imp Pack IIPT Imp Pack II 60 220 80 87 85
PT Imp Pack IIIPT Imp Pack III 60 250 82 89 88
PT Imp Pack IVPT Imp Pack IV ? ? ? 84? ?
Schnellboot Imp PackSchnellboot Imp Pack ? ? ? ? ?
Schnellboot Imp Pack IISchnellboot Imp Pack II ? ? ? ? ?
Schnellboot Imp Pack EliteSchnellboot Imp Pack Elite ? ? ? ? ?


The main Accuracy modifiers are
  • [math]\displaystyle{ \text{Mod}_\text{Amagiri} }[/math] being include in [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math]:
  • [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math] the bonus given by ship types, described below,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] the bonuses given by equipment, described below,
  • [math]\displaystyle{ \text{Mod}_\text{Night} }[/math] being 0.7 during night battle, 1 during day battle.


Amagiri Kai Ni/DAmagiri Kai Ni
Amagiri Kai Ni D
has the ability to prioritize focusing on attacking PT imps with significantly increased accuracy if any are present.

  • DD placed in the composition slots above and below her will gain a noticeable accuracy boost and will prioritize attacking PT boats if any are present.
  • The PT boat targeting rate is 100% for all affected ships [9].

During Events, some special bonuses may be added, with "historical" ships and equipment gaining some accuracy bonuses[10].

Ship Type [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math]
DD & DE 1.0
CL, CLT, & CT 0.82
All other types 0.7
Equipment [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math]
1st equipped 2nd equipped 1st equipped 2nd equipped
Small Caliber Main GunSmall Caliber Main High-angle GunSmall Small Caliber Main Guns[11] 1.3 1.15 1.5 2.11.5×1.4
Secondary GunSecondary High-angle GunSec Secondary Guns[12] 1.55 1 1.3
Anti-Aircraft Gun Anti-Aircraft Guns 1.45 1.35 1.2 1.441.2×1.2
Lookout Skilled LookoutsSkilled Lookouts
Torpedo Squadron Skilled Lookouts
1.75 1 1.1
Landing CraftArmed Soukoutei (Armored Boat Class)Soukoutei (Armored Boat Class) 1.45 1.3 1.2 1.1
Armed DaihatsuArmed Daihatsu 1.45 1.3 1.2 1.1
Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
Special Type 4 Amphibious Tank Kai
[13][14]
1 1.3 1 1.1
Seaplane BomberBomberSeaplane Fighter Seaplane Bombers & Seaplane Fighters 1.5 1 1.2
Dive BomberJetFighterBomber1.pngJetFighterBomber2.png Dive Bombers & JetsKikka Kai
Jet Keiun Kai
1.375 1.2 1.4 1.821.4×1.3
All other equipment 1 1
Notes
  • It is recommended to use anti-PT setups on DDs only, such setups compromising overall combat effectiveness.
  • Having a Reinforcement Expansion is important because it can save a ship slot by containing a machine gun or skilled lookouts.
  • Combining equipment is recommended to see significant boosts to accuracy.
  • The Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
    Special Type 4 Amphibious Tank Kai
    bonus does not stack with the Landing Craft Armed BoatsSoukoutei (Armored Boat Class)
    Armed Daihatsu
    ones.
  • Using other setups improving accuracy is also advisable:
References:
[edit]
LBAS Notes
All LBAS should be sent on the node.
Node D3
Fleet Info
Single Striking: 0-1 FBB, 1-2 CA, 0-1 CLT, 1 CL, 4 DD Spring 2025 Event Tag 3.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
1 A C D D3
Air State (C / E / M / H)
AD AP AS AS+
0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0
LBAS
Range AS Sortie AS Defense
Node D3: 4 0 / 0 / 0 / 0 158 / 209 / 230 / 281
Fleet Notes
The enemy is a submarine node, it is therefore advised to ging ASW.
LBAS Notes
All LBAS can be sent on ASW duty on the node, or be mixed with node D.
Node E2
Fleet Info
Single Striking: 0-1 FBB, 1-2 CA, 0-1 CLT, 1 CL, 4 DD Spring 2025 Event Tag 3.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
1 A C E E2
Air State (C / E / M / H)
AD AP AS AS+
56 / 56 / 56 / 59 84 / 84 / 84 / 88 189 / 189 / 189 / 198 378 / 378 / 378 / 396
LBAS
Range AS Sortie AS Defense
Node E2: 6 198 / 200 / 200 / 209 158 / 209 / 230 / 281
Fleet Notes
The enemy is a strong surface fleet.
LBAS Notes
All LBAS should be sent on the node.

Phase 1 - Boss

Light Fleet
Fleet Info
Single Striking: 0-1 (F)BB(V), 0-2 CA(V), 1 CL, 0-1 CLT, 4-5 DD Spring 2025 Event Tag 3.png
LoS Cn3: ? / ? / ? / ? (C/E/M/H)
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
1 A C E F F1 G
Air State (C / E / M / H)
AD AP AS AS+
24 / 70 / 70 / 80 36 / 105 / 105 / 120 81 / 236 / 236 / 269 162 / 472 / 472 / 538
LBAS
Range AS Sortie AS Defense
Boss G: 6 83 / 237 / 237 / 312 158 / 209 / 230 / 281
Fleet Notes
The shortest route to the boss, but requires a relatively light fleet.
  • If the fleet is slow, it will pass though node F3.
  • Bringing an AACI is recommended.
LBAS Notes
All bases should be sent on the boss.
Heavy Fleet
Fleet Info
Single Striking: 1-2 FBB, 0-1 CA, 1 CL, 0-1 CLT, 3-4 DD Spring 2025 Event Tag 3.png
LoS Cn3: ? / ? / ? / ? (C/E/M/H)
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
1 A C E F F1 F3 G
Air State (C / E / M / H)
AD AP AS AS+
24 / 70 / 70 / 80 36 / 105 / 105 / 120 81 / 236 / 236 / 269 162 / 472 / 472 / 538
LBAS
Range AS Sortie AS Defense
Boss G: 6 83 / 237 / 237 / 312 158 / 209 / 230 / 281
Fleet Notes
A stronger fleet that cal allow 2 FBB, but that route through extra node F3 witch contains a sub loli.
  • The Fleet only needs to be fast when using 2 FBB, else, it can be slow.
  • Bringing ASW is recommended.
  • Bringing an AACI is recommended.
LBAS Notes
All bases should be sent on the boss.

To route E F, the Medium ArmorMedium Arctic Camouflage (+ Arctic Equipment)Arctic Camouflage (+ Arctic Equipment) must be equipped in the fleet:

  • On 3+ ships in hard,
  • On 1+ ships in medium,
  • On 0+ ships in easy/casual.

Otherwise, the fleet with pass through extra node E2

Using Boss support is recommended.

PT Imp Packs are on the route, it is therefore advised to bring some anti-PT setups:

Anti-PT boat
Unlike most standard Abyssals, "PT boats" (PT Imp PackPT Imp Pack & Schnellboot Imp PackSchnellboot Imp Pack) are "very small and fast".
  • All ship types suffer a severe Accuracy accuracy and Firepower firepower penalty against PT boats.
  • Attacking them with larger guns is not very effective, smaller guns being recommended instead.
  • Support Expeditions are not affect by any of the following[1].
Attack formula against PT boats
The Attack formula against PT boats:[2][3]
Jet Assault & Airstrike
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.5 ; 0.8] }[/math]


LBAS[4]
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.4 ; 0.7] }[/math]


Shelling
  • [math]\displaystyle{ \text{Damage}_\text{PT}= ( 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 ) \times \prod^{All Equipment}{\text{Mod}_\text{EquipmentAtk}} }[/math]


Opening & Closing Torpedo Salvos
  • [math]\displaystyle{ \text{Damage}_\text{PT}= 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 }[/math]


Night Battle
  • Night Battle data are unclear yet.


With
  • [math]\displaystyle{ \text{Atk}_\text{post-cap} }[/math] the post cap attack power defined here,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math] the bonuses given by equipment, described below.
Accuracy formula against PT boats
The Accuracy formula against PT boats:[5][6][7][8]
[math]\displaystyle{ \text{Hit Rate}_\text{vs.PT} \text{%} = \Big\lfloor ( 0.3 \times \text{Accuracy}_\text{Atk} + \sqrt{\text{Accuracy}_\text{Atk}} + 15 ) \times 1.2 \times \text{Mod}_\text{Ship} \times \Big( \prod^{All Equipment}{\text{Mod}_\text{EquipmentAcc}} \Big) \times \text{Mod}_\text{Night} \Big\rfloor - \text{EVA}_\text{PT} + 1 }[/math]
With
  • [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math] the standard accuracy described here
    • PT boats are "DDs" in the game, so the [math]\displaystyle{ \text{Mod}_\text{formation} }[/math] for vanguard is 1.1 during shelling, and 1.2 during the torpedo phase.
    • Historical accuracy bonuses during Events are included in the Standard Accuracy Term, i.e. it is affected by the [math]\displaystyle{ \text{Mod}_\text{PT} }[/math] modifier.
  • [math]\displaystyle{ \text{EVA}_\text{PT} }[/math] the PT estimated evasion Evasion described bellow,
PT boats stats
Type Luck Luck Eva Evasion [math]\displaystyle{ \text{EVA}_\text{PT} }[/math]
Line AheadLineAhead.png EchelonEchelon.png Line AbreastLineAbreast.png
PT Imp PackPT Imp Pack ? ? 81? 87? ?
PT Imp Pack IIPT Imp Pack II 60 220 80 87 85
PT Imp Pack IIIPT Imp Pack III 60 250 82 89 88
PT Imp Pack IVPT Imp Pack IV ? ? ? 84? ?
Schnellboot Imp PackSchnellboot Imp Pack ? ? ? ? ?
Schnellboot Imp Pack IISchnellboot Imp Pack II ? ? ? ? ?
Schnellboot Imp Pack EliteSchnellboot Imp Pack Elite ? ? ? ? ?


The main Accuracy modifiers are
  • [math]\displaystyle{ \text{Mod}_\text{Amagiri} }[/math] being include in [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math]:
  • [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math] the bonus given by ship types, described below,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] the bonuses given by equipment, described below,
  • [math]\displaystyle{ \text{Mod}_\text{Night} }[/math] being 0.7 during night battle, 1 during day battle.


Amagiri Kai Ni/DAmagiri Kai Ni
Amagiri Kai Ni D
has the ability to prioritize focusing on attacking PT imps with significantly increased accuracy if any are present.

  • DD placed in the composition slots above and below her will gain a noticeable accuracy boost and will prioritize attacking PT boats if any are present.
  • The PT boat targeting rate is 100% for all affected ships [9].

During Events, some special bonuses may be added, with "historical" ships and equipment gaining some accuracy bonuses[10].

Ship Type [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math]
DD & DE 1.0
CL, CLT, & CT 0.82
All other types 0.7
Equipment [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math]
1st equipped 2nd equipped 1st equipped 2nd equipped
Small Caliber Main GunSmall Caliber Main High-angle GunSmall Small Caliber Main Guns[11] 1.3 1.15 1.5 2.11.5×1.4
Secondary GunSecondary High-angle GunSec Secondary Guns[12] 1.55 1 1.3
Anti-Aircraft Gun Anti-Aircraft Guns 1.45 1.35 1.2 1.441.2×1.2
Lookout Skilled LookoutsSkilled Lookouts
Torpedo Squadron Skilled Lookouts
1.75 1 1.1
Landing CraftArmed Soukoutei (Armored Boat Class)Soukoutei (Armored Boat Class) 1.45 1.3 1.2 1.1
Armed DaihatsuArmed Daihatsu 1.45 1.3 1.2 1.1
Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
Special Type 4 Amphibious Tank Kai
[13][14]
1 1.3 1 1.1
Seaplane BomberBomberSeaplane Fighter Seaplane Bombers & Seaplane Fighters 1.5 1 1.2
Dive BomberJetFighterBomber1.pngJetFighterBomber2.png Dive Bombers & JetsKikka Kai
Jet Keiun Kai
1.375 1.2 1.4 1.821.4×1.3
All other equipment 1 1
Notes
  • It is recommended to use anti-PT setups on DDs only, such setups compromising overall combat effectiveness.
  • Having a Reinforcement Expansion is important because it can save a ship slot by containing a machine gun or skilled lookouts.
  • Combining equipment is recommended to see significant boosts to accuracy.
  • The Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
    Special Type 4 Amphibious Tank Kai
    bonus does not stack with the Landing Craft Armed BoatsSoukoutei (Armored Boat Class)
    Armed Daihatsu
    ones.
  • Using other setups improving accuracy is also advisable:
References:
[edit]
Northern Water Princess

Gimmick 2 - Unlock

To unlock the 2nd boss, the following steps have to be performed:

H3 I1 I3 K2 M1 M2
Hard S x2 S x2 S x2 A+ x2 S AS
Medium ? ? ? ? ? ?
Easy ? ? ? ? ? ?
Casual ? ? ? ? ? ?
Node H3
Fleet Info
Single Striking: 0-1 (F)BB(V), 0-1 CV(B/L), 0-2 CA, 1 CL, 2-6 DD, 0-2 DE Spring 2025 Event Tag 1.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
2 H H1 H3
Air State (C / E / M / H)
AD AP AS AS+
0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0
LBAS
Range AS Sortie AS Defense
Node H3: 1 0 / 0 / 0 / 0 158 / 209 / 230 / 281
Fleet Notes
The enemy is a submarine fleet and requires proper ASW.
  • Bringing an AACI can be useful.
LBAS Notes
All LBAS should be sent on the node.
Node I1
Fleet Info
Single Striking: 0-1 (F)BB(V), 0-1 CV(B/L), 0-2 CA, 1 CL, 2-6 DD, 0-2 DE Spring 2025 Event Tag 1.png
LoS Any
Speed Slow
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
2 H I I1
Air State (C / E / M / H)
AD AP AS AS+
0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0
LBAS
Range AS Sortie AS Defense
Node I1: 4 0 / 0 / 0 / 0 158 / 209 / 230 / 281
Fleet Notes
The enemy is a submarine fleet and requires proper ASW.
LBAS Notes
All LBAS should be sent on the node.
Node I3
Fleet Info
Single Striking: 0-1 (F)BB(V), 0-1 CV(B/L), 0-2 CA, 1 CL, 2-6 DD Spring 2025 Event Tag 1.png
LoS Any
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
2 H I I2 I3
Air State (C / E / M / H)
AD AP AS AS+
11 / 56 / 48 / 59 16 / 84 / 71 / 88 36 / 189 / 159 / 198 72 / 378 / 318 / 396
LBAS
Range AS Sortie AS Defense
Node I3: 3 41 / 197 / 165 / 222 158 / 209 / 230 / 281
Fleet Notes
The enemy is a surface fleet.
  • Bringing an AACI can be useful.
LBAS Notes
All LBAS should be sent on the node.
Node K2
Fleet Info
Single Striking: 0-1 (F)BB(V), 0-1 CV(B/L), 0-2 CA, 1 CL, 2-6 DD, 0-2 DE Spring 2025 Event Tag 1.png
LoS Cn3: ? / ? / ? / ? (C/E/M/H)
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
2 H I J K K2
Air State (C / E / M / H)
AD AP AS AS+
0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0 0 / 0 / 0 / 0
LBAS
Range AS Sortie AS Defense
Node K2: 5 0 / 0 / 0 / 0 158 / 209 / 230 / 281
Fleet Notes
The fleet must either:

2 submarine nodes are on the route, so ASW is advised.

LBAS Notes
All LBAS should be sent on the node.
Nodes M1 & M2 - STF
Fleet Info
Main 2 (F)BB(V), 1-2 CVL, 1-2 CAV, 1-2 CL, 0-1 AV Spring 2025 Event Tag 4.png
Escort 1 CL, 1 CLT, 4 DD Spring 2025 Event Tag 4.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
2 H I J K L M M1

2 H I J K L M M2

Air State (C / E / M / H)
AD AP AS AS+
31 / 43 / 45 / 57 46 / 64 / 67 / 86 102 / 144 / 150 / 192 204 / 288 / 300 / 384
LBAS
Range AS Sortie AS Defense
Node M1: 2 ; Node M2: 4 102 / 144 / 150 / 192 158 / 209 / 230 / 281
Fleet Notes
Same comp as for the following boss phase.
LBAS Notes
All LBAS can be sent on node M1, but might not be needed for M2.

Phase 2 - Boss

STF
Fleet Info
Main 2 (F)BB(V), 1-2 CVL, 1-2 CAV, 1-2 CL, 0-1 AV Spring 2025 Event Tag 4.png

2 (F)BB(V), 1 CV(B), 1-2 CAV, 1-2 CL, 0-1 AV Spring 2025 Event Tag 4.png

Escort 0-1 CA, 1 CL, 1-2 CLT, 3-4 DD Spring 2025 Event Tag 4.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L M M2 P O1 R

3 K L M M1 P O1 R

Air State (C / E / M / H)
AD AP AS AS+
75 / 83 / 111 / 118 112 / 124 / 166 / 177 251 / 278 / 372 / 398 502 / 556 / 744 / 796
LBAS
Range AS Sortie AS Defense
Boss R: 2 252 / 279 / 377 / 402 158 / 209 / 230 / 281
Fleet Notes
A strong fleet that can notably utilize Special Attacks.
  • The path going thought M2 is preferable when looking to reach AD, else M1 is better to reach AS.
  • Using an AACI is recomanded.
LBAS Notes
All LBAS should be sent on the boss.
TCF - Shortest Route
Fleet Info
Main 2 CAV, 4 DD Spring 2025 Event Tag 4.png
Escort 0-1 CA, 1-2 CL, 3-5 DD Spring 2025 Event Tag 4.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L N O R
Air State (C / E / M / H)
AD AP AS AS+
75 / 83 / 111 / 118 112 / 124 / 166 / 177 251 / 278 / 372 / 398 502 / 556 / 744 / 796
LBAS
Range AS Sortie AS Defense
Boss R: 2 252 / 279 / 377 / 402 158 / 209 / 230 / 281
Fleet Notes
A very light fleet that only goes through 3 battle nodes to reach the boss.
  • Using an AACI is recomanded.
LBAS Notes
All LBAS should be sent on the boss.

The boss node has several Installations, notably a Supply Depot Princess D.

Boss fleet has of two Transport Ship Wa-Class B (Landing) Elite, which has high AA strength and is armed with a Barrage Balloon Barrage Balloon, to counter damage from carriers and LBAS.

  • Be advised that if a land base is sent to R, planes and rank loss will be significantly higher.
    • It is therefore recommended to bring several Barrage Balloon Barrage Balloons in order to both mitigate these and buff allied aircraft damage.

As only the non-installation flagship needs to be killed, it is highly advised to use as much TCI as possible in the escort fleet, in order to focus on the surface ships and ignore the installation during the torpedo phases and night battle.

  • Using Boss support is recommended.
Supply Depot Princess D

Gimmick 3 - Unlock

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

U
Hard A+ x2
Medium ?
Easy ?
Casual ?
Node U STF
Fleet Info
Main 2 (F)BB(V), 1-2 CVL, 1-2 CAV, 1-2 CL, 0-1 AV Spring 2025 Event Tag 4.png
Escort 1 CL, 1 CLT, 4 DD Spring 2025 Event Tag 4.png
LoS Any
Speed Any
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L M M2 S S1 T U
Air State (C / E / M / H)
AD AP AS AS+
60 / 112 / 145 / 164 90 / 168 / 218 / 246 201 / 377 / 489 / 552 402 / 754 / 978 / 1104
LBAS
Range AS Sortie AS Defense
Boss U: 4 203 / 381 / 494 / 557 158 / 209 / 230 / 281
Fleet Notes
A fleet similar to the two other phases with this lock, that can notably utilize Special Attacks.
LBAS Notes
All LBAS should be sent on the node.
Node U CTF
Fleet Info
Main 0-1 (F)BB(V), 2 CV(B), 0-1 CVL, 2 CA, 1 CL Spring 2025 Event Tag 4.png
Escort 1 CL, 0-1 CLT, 4-5 DD Spring 2025 Event Tag 4.png
LoS Any
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L M M2 S S1 T U
Air State (C / E / M / H)
AD AP AS AS+
60 / 112 / 145 / 164 90 / 168 / 218 / 246 201 / 377 / 489 / 552 402 / 754 / 978 / 1104
LBAS
Range AS Sortie AS Defense
Boss U: 4 203 / 381 / 494 / 557 158 / 209 / 230 / 281
Fleet Notes
A fleet that can bring more air power and may utilize a Nelson-class Special Attack.
LBAS Notes
All LBAS should be sent on the node.

The enemy is an Installation

To route T U, 2 Medium ArmorMedium Arctic Camouflage (+ Arctic Equipment)Arctic Camouflage (+ Arctic Equipment) must be equipped in the fleet, else, it will pass thought extra node F3.

The node has several Installations, notably a Supply Depot Princess D.

It also has of a Transport Ship Wa-Class B (Landing) Elite, which has high AA strength and is armed with a Barrage Balloon Barrage Balloon, to counter damage from carriers and LBAS.

  • Be advised that if a land base is sent to R, planes and rank loss will be significantly higher.
    • It is therefore recommended to bring several Barrage Balloon Barrage Balloons in order to both mitigate these and buff allied aircraft damage.

PT Imp Packs are on the node, it is therefore advised to bring some anti-PT setups:

Anti-PT boat
Unlike most standard Abyssals, "PT boats" (PT Imp PackPT Imp Pack & Schnellboot Imp PackSchnellboot Imp Pack) are "very small and fast".
  • All ship types suffer a severe Accuracy accuracy and Firepower firepower penalty against PT boats.
  • Attacking them with larger guns is not very effective, smaller guns being recommended instead.
  • Support Expeditions are not affect by any of the following[1].
Attack formula against PT boats
The Attack formula against PT boats:[2][3]
Jet Assault & Airstrike
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.5 ; 0.8] }[/math]


LBAS[4]
  • [math]\displaystyle{ \text{Damage}_\text{PT}= \text{Atk}_\text{post-cap} \times \text{Rand} [0.4 ; 0.7] }[/math]


Shelling
  • [math]\displaystyle{ \text{Damage}_\text{PT}= ( 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 ) \times \prod^{All Equipment}{\text{Mod}_\text{EquipmentAtk}} }[/math]


Opening & Closing Torpedo Salvos
  • [math]\displaystyle{ \text{Damage}_\text{PT}= 0.3 \times \text{Atk}_\text{post-cap} + \sqrt{\text{Atk}_\text{post-cap}} + 10 }[/math]


Night Battle
  • Night Battle data are unclear yet.


With
  • [math]\displaystyle{ \text{Atk}_\text{post-cap} }[/math] the post cap attack power defined here,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math] the bonuses given by equipment, described below.
Accuracy formula against PT boats
The Accuracy formula against PT boats:[5][6][7][8]
[math]\displaystyle{ \text{Hit Rate}_\text{vs.PT} \text{%} = \Big\lfloor ( 0.3 \times \text{Accuracy}_\text{Atk} + \sqrt{\text{Accuracy}_\text{Atk}} + 15 ) \times 1.2 \times \text{Mod}_\text{Ship} \times \Big( \prod^{All Equipment}{\text{Mod}_\text{EquipmentAcc}} \Big) \times \text{Mod}_\text{Night} \Big\rfloor - \text{EVA}_\text{PT} + 1 }[/math]
With
  • [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math] the standard accuracy described here
    • PT boats are "DDs" in the game, so the [math]\displaystyle{ \text{Mod}_\text{formation} }[/math] for vanguard is 1.1 during shelling, and 1.2 during the torpedo phase.
    • Historical accuracy bonuses during Events are included in the Standard Accuracy Term, i.e. it is affected by the [math]\displaystyle{ \text{Mod}_\text{PT} }[/math] modifier.
  • [math]\displaystyle{ \text{EVA}_\text{PT} }[/math] the PT estimated evasion Evasion described bellow,
PT boats stats
Type Luck Luck Eva Evasion [math]\displaystyle{ \text{EVA}_\text{PT} }[/math]
Line AheadLineAhead.png EchelonEchelon.png Line AbreastLineAbreast.png
PT Imp PackPT Imp Pack ? ? 81? 87? ?
PT Imp Pack IIPT Imp Pack II 60 220 80 87 85
PT Imp Pack IIIPT Imp Pack III 60 250 82 89 88
PT Imp Pack IVPT Imp Pack IV ? ? ? 84? ?
Schnellboot Imp PackSchnellboot Imp Pack ? ? ? ? ?
Schnellboot Imp Pack IISchnellboot Imp Pack II ? ? ? ? ?
Schnellboot Imp Pack EliteSchnellboot Imp Pack Elite ? ? ? ? ?


The main Accuracy modifiers are
  • [math]\displaystyle{ \text{Mod}_\text{Amagiri} }[/math] being include in [math]\displaystyle{ \text{Acc}_\text{Atk} }[/math]:
  • [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math] the bonus given by ship types, described below,
  • [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] the bonuses given by equipment, described below,
  • [math]\displaystyle{ \text{Mod}_\text{Night} }[/math] being 0.7 during night battle, 1 during day battle.


Amagiri Kai Ni/DAmagiri Kai Ni
Amagiri Kai Ni D
has the ability to prioritize focusing on attacking PT imps with significantly increased accuracy if any are present.

  • DD placed in the composition slots above and below her will gain a noticeable accuracy boost and will prioritize attacking PT boats if any are present.
  • The PT boat targeting rate is 100% for all affected ships [9].

During Events, some special bonuses may be added, with "historical" ships and equipment gaining some accuracy bonuses[10].

Ship Type [math]\displaystyle{ \text{Mod}_\text{Ship} }[/math]
DD & DE 1.0
CL, CLT, & CT 0.82
All other types 0.7
Equipment [math]\displaystyle{ \text{Mod}_\text{EquipmentAcc} }[/math] [math]\displaystyle{ \text{Mod}_\text{EquipmentAtk} }[/math]
1st equipped 2nd equipped 1st equipped 2nd equipped
Small Caliber Main GunSmall Caliber Main High-angle GunSmall Small Caliber Main Guns[11] 1.3 1.15 1.5 2.11.5×1.4
Secondary GunSecondary High-angle GunSec Secondary Guns[12] 1.55 1 1.3
Anti-Aircraft Gun Anti-Aircraft Guns 1.45 1.35 1.2 1.441.2×1.2
Lookout Skilled LookoutsSkilled Lookouts
Torpedo Squadron Skilled Lookouts
1.75 1 1.1
Landing CraftArmed Soukoutei (Armored Boat Class)Soukoutei (Armored Boat Class) 1.45 1.3 1.2 1.1
Armed DaihatsuArmed Daihatsu 1.45 1.3 1.2 1.1
Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
Special Type 4 Amphibious Tank Kai
[13][14]
1 1.3 1 1.1
Seaplane BomberBomberSeaplane Fighter Seaplane Bombers & Seaplane Fighters 1.5 1 1.2
Dive BomberJetFighterBomber1.pngJetFighterBomber2.png Dive Bombers & JetsKikka Kai
Jet Keiun Kai
1.375 1.2 1.4 1.821.4×1.3
All other equipment 1 1
Notes
  • It is recommended to use anti-PT setups on DDs only, such setups compromising overall combat effectiveness.
  • Having a Reinforcement Expansion is important because it can save a ship slot by containing a machine gun or skilled lookouts.
  • Combining equipment is recommended to see significant boosts to accuracy.
  • The Amphibious Vehicle Ka-Tsu TanksSpecial Type 4 Amphibious Tank
    Special Type 4 Amphibious Tank Kai
    bonus does not stack with the Landing Craft Armed BoatsSoukoutei (Armored Boat Class)
    Armed Daihatsu
    ones.
  • Using other setups improving accuracy is also advisable:
References:
[edit]

Phase 3 - Boss

STF
Fleet Info
Main Fast: 3 (F)BB(V), 2 CVL, 1 CA Spring 2025 Event Tag 4.png

Slow: 3 (F)BB(V), 1 CV(B), 2 CL Spring 2025 Event Tag 4.png

Escort 1 CAV, 1 CL, 1-2 CLT, 2-3 DD Spring 2025 Event Tag 4.png
LoS Cn3: ? / ? / ? / ? (C/E/M/H)
Speed Fast / Slow
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L M M2 S S2 V X
Air State (C / E / M / H)
AD AP AS AS+
39 / 80 / 0 / 150 58 / 120 / 0 / 224 129 / 269 / 0 / 504 258 / 538 / 0 / 1008
LBAS
Range AS Sortie AS Defense
Boss X: 8 140 / 288 / ? / 524 158 / 209 / 230 / 281
Fleet Notes
Must be fast of have 3+ CL to avoid extra node Q.
LBAS Notes
All LBAS should be sent on the boss.
CTF
Fleet Info
Main 2 (F)BB(V), 2 CV(B), 1 CVL, 1 CA Spring 2025 Event Tag 4.png
Escort 1 CAV, 1 CL, 1 CLT, 3 DD Spring 2025 Event Tag 4.png
LoS Cn3: ? / ? / ? / ? (C/E/M/H)
Speed Fast
RouteNode Types:
RED: Battle
PURPLE: Night Battle
PINK: Air Raid/Battle
ORANGE: Enemy Ambush/ASS
BLUE: Empty/Choice
Light Blue: Emergency Anchorage Repair
GREEN: Resource/TP
VIOLET: Maelstrom
3 K L M M2 S S2 V X
Air State (C / E / M / H)
AD AP AS AS+
39 / 80 / 0 / 150 58 / 120 / 0 / 224 129 / 269 / 0 / 504 258 / 538 / 0 / 1008
LBAS
Range AS Sortie AS Defense
Boss X: 8 140 / 288 / ? / 524 158 / 209 / 230 / 281
Fleet Notes
Must be fast of have 3+ CL to avoid extra node Q.
LBAS Notes
All LBAS should be sent on the boss.

Having strong AACI is recommended to reach and face the boss.

The use of a Special Attack is highly recommended.

Smoke Generator Smokes can help pass node V.

Gimmick 4 - Repair Node

To unlock the bonus Repair Node, the following steps have to be performed:

G K2 R U LBAS
Hard S? A+ S? K2? AS x2
Medium ? ? ? ? ?
Easy ? ? ? ? ?
Casual ? ? ? ? ?

LBAS AS
Hard 281
Medium 230
Easy 209
Casual 158

Gimmick 5 - Debuff

Once LD has been reached, the following steps have to be performed to debuff the boss.

B4 K2 G T U LBAS
Hard A+ x2 A+ x2 A+ x2 A+ x2 A+ x2 AS x2
Medium ? ? ? ? ? ?
Easy ? ? ? ? ? ?
Casual ? ? ? ? ? ?

LBAS AS
Hard 281
Medium 230
Easy 209
Casual 158

Once on LD, the CG will change to the following:

Non-Treaty Cruiser Water Princess

YY's Guide