Winter 2019 Event/Info

English	Assault! Buin Defense Operation[Edit]
Japanese	邀撃！ブイン防衛作戦
Romaji	Yōgeki! Buin bōei sakusen
Start	December 26th, 2018	End	January 22nd, 2019 (extended)
Scale	Small	New Content	4 ships, 2 equipments, 3 abyssals
Maps	2 MO + 1 EO	Duration	4 weeks

Template:Please Read

Important Notice for all Players before Event Start

Before you start the Event

• A friendly reminder that once you clear a map — destroying the gauge by sinking the boss on her final form — at your chosen difficulty, there is no going back to change it.
• Please read the mechanics tab first - especially 'Ship locking' and 'Difficulty selection' — or the Info tab to plan before starting. Consider asking the Discord channel for help.
  • Anyone who wishes to tackle Medium+ should not rush into the map. Check other maps and see their requirements unless you wish to fight later maps
• Remember that under normal circumstances your final objective of every map is sinking the boss. You only need to deplete the gauge and sink boss one last time in order to clear a map; sinking any escort ships is optional.

Classification Clarification

In the guide, you may see the following: CA(V), CV(L/B), (f)BB(V). These parentheses mean that the following sub-class also satisfy the branching rule requirements. For example, CV(L) means that both aircraft and light-aircraft carrier are acceptable while CV(L/B) also include armored-aircraft carrier into the requirement.

Winter 2019 Event Historical Ships with Bonus

There are specific ships with Bonus Damage against the Bosses of each Map. Please look through the list to plan out the Fleet you will use for each respective Maps.

• Certain Ships have Bonus in multiple Maps
  • Unless you are doing Casual/Easy Mode, please make sure to check the Ships who has Bonus on multiple maps so that you choose a specific map to use her.

• E-1
• E-2
• E-3

Ship	Damage Bonus	Ship	Damage Bonus
Destroyer (DD)
Murasame	1.50	Minegumo	1.50
Shiratsuyu-class	1.30	Asashio-class	1.30
Light Cruiser (CL)
Jintsuu	1.44	Yura	1.25
Non-Stackable Radar Bonus
Requires 2 Gun + 1 Radar setup			1.15

Ship	Damage Bonus	Sample Size	Ship	Damage Bonus	Sample Size
Destroyer (DD)
Akatsuki	1.53 ~ 1.55	26	Ayanami	1.64 ~ 1.63	39
Fubuki	1.48 ~ 1.6	8	Inazuma	1.3 ~ 1.31	11
Makigumo	1.5 ~ 1.51	13	Murakumo	1.26 ~ 1.32	9
Naganami	1.28 ~ 1.32	15	Ushio	1.33 ~ 1.34	22
Verniy	1.25 ~ 1.32	7	Yuudachi	1.54 ~ 1.54	53
Yuugumo	1.29 ~ 1.32	15
Light Cruiser (CL)
Jintsuu	1.91 ~ 1.9	73	Naka	1.31 ~ 1.36	5
Sendai	1.52 ~ 1.52	17	Yura	1.47 ~ 1.43	49
Heavy Cruiser (CA)
Furutaka	1.34 ~ 1.37	67
Battleship (BB)
Hiei	1.43 ~ 1.43	66	Kirishima	1.43 ~ 1.42	134

Ship	Damage Bonus		Ship	Damage Bonus
Destroyer (DD)
	Base	With ZZ		Base	With ZZ
Isokaze   Arashi Hagikaze Hatsukaze	1.75	2.0125	Kawakaze	1.45	1.6675
Mutsuki Class Other Kagerou Class Shigure Nenohi Samidare Shiratsuyu Naganami Yuugumo Hatsushimo	1.3	1.495	Other DDs	1.15	1.3225
Light Cruiser (CL)
Sendai	1.25
Heavy Cruiser (CA)
Myoukou	1.25		Haguro	1.25
Seaplane Tender (AV)
Nisshin	1.75	2.275	Other AVs	1.15	1.495
ZZ Bonus (Does NOT apply to E3S)
Destroyers (DD)	1.15		Seaplane Tender (AV)	1.3

Surface Radar Requirement

The Winter 2019 Event has implemented a new requirement where the player's fleet must have a certain amount of Ships who each respectively has a "Surface Radar" equipped for Branching Rules.

• This includes a new mechanic called "Radar Ambush" Nodes. Failing to avoid an ambush will have the enemy ships take free shots on your fleet without any retaliation from you. The fight functions like a day battle, therefore no cut-in will occur. If you succeed in avoiding the ambush, your fleet will not go through the ambush node in the first place.
• To avoid a Radar Ambush, you are required to bring a certain number of radars depending on the map. The game counts the number of ships with radars, not the total number of radars they have equipped.
  • EXAMPLE: E-1H Phase 2 requires 5 radars. If you have 6 ships, you must bring 5 radars on 5 different ships, not 5 radars on 2 ships.

Equipment treated as a "Surface Radar"

• Despite the name "Surface Radar", certain Air Radars are also treated as a Surface Radar under the Branching Rules due to their LOS Stat.
  • The Radar must have at least 5+ LOS Stats to fall under the category.

Radars treated as a 'Surface Radar' by the Branching Rules
※Certain Air Radars are treated as a Surface Radar for Branching Rules due to their LOS Stat. ※The Radar must have at least 5+ LOS Stats to fall under the category.
Small Surface Radars
Large Surface Radars
Small Surface + Air Hybrid Radars
Large Surface + Air Hybrid Radars
Battleship Surface + Air Hybrid Radars

Difficulty Selection

Each map in this event has four (4) difficulty levels (a.k.a. operation ranks) the player can choose from:

• Casual (丁) (Unlocks at HQ level 1)
• Easy (丙) (Unlocks at HQ level 1)
• Medium/Normal (乙) (Unlocks at HQ level 35)
• Hard (甲) (Unlocks at HQ level 80)

The operation rank affects enemy patterns, boss health and strength, the number of times the player has to sink the boss in order to clear the map and the drop rates of ships. Different ranks reward different medals, pieces of equipment and/or materials upon clearing a map. The higher the operation rank, the better the reward.

However, new ship rewards are available on all difficulty levels, and you only have to clear the final event map on Hard to get the exclusive First-class medal.

Click that option circled in as shown in red to change difficulty

You can choose the difficulty level for each individual map separately. However, you will NOT be able to select Hard for a map if you cleared the previous map on Casual/Easy. You must clear the previous map at least on Medium/Normal.

• 【NOT POSSIBLE】Casual/Easy > Hard
• 【POSSIBLE】(Medium/Normal)/Hard > Hard
• 【POSSIBLE】Casual/Easy/(Medium/Normal)/Hard > (Medium/Normal)
• 【POSSIBLE】Casual/Easy/(Medium/Normal)/Hard > Casual/Easy

Un-highlighted words indicate Current Difficulty

It is also possible to change the difficulty level afterwards, however:

• If you drop to a lower difficulty (e.g. from Hard to Normal/Easy), the current HP/TP bar value (the one you have the moment you drop down) will increase by 25% of the new maximum and you will retain ALL unlocking/phases done on the previous difficulty level.
• However, if you change to a higher difficulty (e.g. from Easy to Hard), the boss's HP/TP bar will be reset upon doing so and ALL unlocking/debuffs/phases will be reset as well. In short, you will lose your entire map progress!

Once the map is cleared (boss HP bar is depleted, boss is defeated, and the HP bar is no longer visible in the map):

• You CAN NO LONGER re-adjust the difficulty level, but can still farm the map on the difficulty you have chosen to clear the map with.
• The enemy patterns revert back to pre-final patterns.

New

Ships

	DD	Minegumo	E-1 Reward
	AV	Nisshin	E-3 Reward
	DD	Johnston	E-3 Drop
	DD	Hayanami	E-2 Drop

Equipment

	5inch Single Gun Mount Mk.30 Kai	Small Caliber Main Gun (High-angle)	E-1 Hard Reward
	Type 2 Land-based Reconnaissance Aircraft (Skilled)	Land-based Reconnaissance Aircraft	E-2 Medium/Hard Reward

Abyssal

Units

File:Abyssal Nimbus Princess Damaged Banner.png	Abyssal Nimbus Princess 3 normal forms 3 damaged forms	Abyssal Destroyer	E-1 Boss
	Abyssal Sun Princess 3 normal forms 3 damaged forms	Abyssal Seaplane Tender	E-3 Boss
	Destroyer Ni-Class 1 new Kai form 1 new Kai Late Model form 1 new Kai Late Model Elite form 1 new Kai Late Model Flagship form	Abyssal Destroyer	Various encounters

Equipment

Abyssal 5inch Twin Gun Mount Model C	Small Caliber Main Gun	Abyssal Nimbus Princess equipment
Abyssal 5.5inch Twin Gun Mount Kai	Medium Caliber Main Gun	Abyssal Sun Princess equipment
Abyssal Target	Midget Submarine	Abyssal Sun Princess equipment
Abyssal 5inch Single Gun Mount Mk.30	Small Caliber Main Gun	Destroyer Ni-Class (Kai forms) equipment

Maps

E-1	E-2	E-3
Grey Tag	Green Tag and Blue Tag	Yellow Tag
Single Fleet	Single Fleet Combined Fleet	Single Fleet Combined Fleet
TP + HP Gauge	HP + HP Gauge	TP + HP Gauge
	LBAS	LBAS

Click on image of each map to jump to respective subpage directly if you don't want to use tab

HP/TP Bar Scaling
The amount of HP (or TP) required to clear a map usually varies depending on an Admiral's HQ Level (this was first observed during Summer 2015 Event). The higher the HQ Level is, the more kills (or TP) may be required to complete a map.
Casual[Edit]	E1		E2		E3
	TP	HP	HP	HP	TP	HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109
110 → 120	170	1600	1400	840	380	4000
Easy[Edit]	E1		E2		E3
	TP	HP	HP	HP	TP	HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109	165	1550	1350	830	370
110 → 120	170	1600	1400	840	380	4000
Medium[Edit]	E1		E2		E3
	TP	HP	HP	HP	TP	HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109
110 → 120	180	1600	1400	840	380	4000
Hard[Edit]	E1		E2		E3
	TP	HP	HP	HP	TP	HP
80 → 89
90 → 99
100 → 109				830
110 → 120	200	1600	1400	840	380	4000

Quick Notes

Event Drops

[Edit]	Press [Expand] to see the table, or [Edit] to edit it
☑ Showing old data ☒ Show old data (hidden)
Legend: R = Reward, D = Drop, Empty = not implemented yet/not yet know, N = not found (after implement)
Exclusive Ships	2014	2015 Events				2016 Events				2017 Events				2018 Events		2019 Events				2020 Events
Portrait Name	Fall	Winter	Spring	Summer	Fall	Winter	Spring	Summer	Fall	Winter	Spring	Summer	Fall	Winter	Fall	Winter	Spring	Summer	Fall	Hinamatsuri	Rainy-Summer	Fall
Akizuki	R	N	N	N	D	D	D	D	D	N	D	D	D	D	N	N	D	N	D	N	D	N
Prinz Eugen	R	N	N	N	D	D	N	D	D	N	N	D	N	N	D	N	N	N	N	N	N	D
U-511		R	D	D	D	N	D	N	N	D	N	D	N	N	N	N	N	D	N	N	D	D
Amagi		R	N	N	N	D	D	D	D	N	D	D	N	N	N	N	N	N	D	N	N	N
Katsuragi			R	N	N	N	N	D	N	N	N	N	D	D	N	N	D	N	N	N	N	N
Littorio			R	N	N	N	D	N	N	N	D	D	N	N	D	N	N	D	N	N	N	D
Roma			D	D	D	N	D	N	N	N	D	D	N	N	D	N	N	D	N	N	N	N
Teruzuki				R	N	N	D	N	N	D	N	D	D	N	N	D	D	N	D	N	D	N
Graf Zeppelin					D	D	D	N	N	N	N	D	N	D	D	N	N	N	N	N	D	D
Hatsuzuki						R	N	N	D	N	N	N	N	N	D	N	N	N	D	N	D	D
Iowa							R	N	N	N	N	N	N	D	N	N	D	N	N	N	N	N
Pola							R	N	D	N	N	D	N	N	D	N	N	D	N	N	N	N
Harukaze							D	N	D	D	D	D	D	D	N	N	N	N	D	N	N	D
Aquila								D	N	N	N	D	N	N	D	N	N	D	N	N	N	D
I-26								D	N	D	N	N	N	N	D	N	N	D	D	N	D	N
Commandant Teste									R	N	N	D	N	N	D	N	D	D	N	N	N	D
Matsukaze										R	N	N	N	D	D	N	N	N	D	N	D	D
I-14										R	N	N	N	N	D	N	N	N	N	N	D	N
I-13										D	D	N	N	N	D	N	N	N	D	N	D	N
Kasuga Maru											R	N	D	D	D	D	D	N	D	N	D	D
Gangut											R	N	N	D	N	N	D	N	N	N	D	D
Shimushu											D	N	D	D	D	D	D	N	N	N	D	D
Kunashiri											D	N	D	D	D	D	D	N	D	N	D	N
Etorofu											D	D	D	D	D	D	D	D	D	D	D	N
Hatakaze												R	N	D	N	N	N	N	D	N	D	D
Richelieu												R	N	D	D	N	N	D	N	D	N	D
Luigi Torelli												D	N	D	D	N	D	D	N	N	D	D
Matsuwa												D	D	D	D	N	D	N	D	D	D	D
Suzutsuki													R	N	N	D	D	N	N	N	D	N
Sado													R	D	D	N	D	D	D	D	D	D
Tsushima													D	D	D	D	D	D	D	D	D	D
I-400													D	N	D	N	D	N	N	N	D	N
Gambier Bay														R	N	N	D	N	N	D	D	D
Intrepid														R	N	N	D	N	N	N	N	N
Hiburi														R	D	D	D	D	D	N	D	D
Daitou														D	D	D	D	D	D	N	D	D
Jervis														D	N	N	N	D	N	N	N	D
Hamanami														D	N	D	D	D	D	D	D	D
Tashkent														D	N	N	D	D	N	N	D	D
Samuel B. Roberts															N	N	D	N	N	D	N	N
Fukae															D	D	D	D	D	D	D	N
Shinyou															R	N	D	D	D	N	D	D
Maestrale															R	N	N	D	N	N	N	N
Nelson															R	N	N	D	N	N	N	D
Gotland															D	D	D	D	N	D	N	D
Minegumo																R	N	D	D	D	D	N
Nisshin																R	N	N	N	N	D	N
Hayanami																D	D	D	D	D	D	D
Johnston																D	D	D	N	N	D	N
Giuseppe Garibaldi																	R	N	N	N	N	D
Colorado																	R	N	N	N	N	D
Hachijou																	R	N	D	N	D	N
Ishigaki																	D	N	D	N	D	N
Fletcher																	D	N	D	N	D	N
Duca degli Abruzzi																		R	N	N	N	N
Janus																		R	N	N	N	D
Mikura																		D	D	N	D	N
Grecale																		D	N	N	N	D
Perth																			R	N	D	D
Shinshuu Maru																			R	N	N	D
Atlanta																			R	N	N	N
De Ruyter																			D	N	D	N
Houston																			D	N	D	N
Hirato																			D	D	D	N
Akishimo																			D	N	D	N
Usugumo																					R	N
I-47																					R	N
Matsu																					R	N
South Dakota																					R	N
Hornet																					R	N
Jingei																					D	D
Kaiboukan No.4																					D	D
Ariake																					D	N
Helena																					D	N
Yashiro																					D	N
Washington																						R
Take																						R
Scirocco																						D
Sheffield																						D
Portrait Name	Fall	Winter	Spring	Summer	Fall	Winter	Spring	Summer	Fall	Winter	Spring	Summer	Fall	Winter	Fall	Winter	Spring	Summer	Fall	Hinamatsuri	Rainy-Summer	Fall
Exclusive Ships	2014	2015 Events				2016 Events				2017 Events				2018 Events		2019 Events				2020 Events
This table includes all ships that are currently unavailable outside of events.