Early Spring 2024 Event/Info

Early Spring 2024 EventEarly Spring 2024 Event Banner.png
Time until event's end:

Early Spring 2024 Event Hub Overview
Introduction & Overview 1st Stage Operations 2nd Stage Operation
E-1 | E-2 | E-3 E-4

The Early Spring 2024 Event, is launched on the 1st of March 2024 (1 day delay), with a delayed launch of 2 day for the 2nd half of the event. It is a "Medium Scale Event".

  • The 1st Stage Operations is titled "Commence! Operation Tatsumaki!",
    • It will involve the use of submarines, submarine tenders, and amphibious tanks.
  • The 2nd Stage Operation theme is unknown yet.

4 new ships have been added, 3 submarines and a submarine tender.

4 new equipment have also been added, with their images and fairies, drawn by Shibafu.

For additional information regarding event-related subjects and content, please refer to Mechanics.

Historical Background

Operation Tatsumaki

Copied from here:

Tatsumaki was the Japanese submarine component of the "Yu" plan (Yu-Go) to decimate the US Fast Carrier Task Force in the lagoon of Majuro atoll in the Marshall islands group (May 1944).

  • It involved the use of a 5 submarines attack force to deliver the main blow to the US stationary forces.
    • Each submarine would carry two "Type 4 Ka-Tsu amphibious landing craft", with each craft specially modified to carry 2 torpedoes.
  • One additional submarine was used for reconnaissance
  • 7 more submarines were positioned to intercept any potential fleeing target.
  • The submarine force was supported by one submarine tender.

This would have been like a "Second Pearl Harbor Attack", a surprise attack supposed to deal a decisive blow to the American Navy.

  • More information on the "Yu" plan here
    • IJN 2nd Torpedo Squadron's vessels Apr.1st 1944; near Operation Yu-Go's commence: Japanese source
    • IJN 3rd Fleet, 10th Squadron's vessels Apr.1st 1944; near Operation Yu-Go's commence: Japanese source

Involved Forces

Operation YU-GO
IJN Force Operation Tatsumaki
SS attack force
I-36, I-38, I-41, I-44, I-53
Amphibious Tanks
Type 4 Ka-Tsu (2 per sub)
SS recon
I-10
SS intercepting force
Ro-104, Ro-105, Ro-106, Ro-107, Ro-108, Ro-112, Ro-116
AS
Tsukushi Maru
IJN Mobile Force for YU-GO
(F)BB(V)
 
Yamato Kai Ni Juu
 
Musashi Kai Ni
 
Nagato Kai Ni

 
Kongou Kai Ni C
 
Haruna Kai Ni C
CV(B)
 
Taihou Kai
 
Shoukaku Kai Ni A
 
Zuikaku Kai Ni A
CVL/CVE
 
Junyou Kai Ni
 
Hiyou Kai
 
Zuihou Kai Ni B

 
Ryuuhou Kai Ni
 
Chitose Kou Kai Ni
 
Chiyoda Kou Kai Ni

 
Taiyou Kai Ni
 
Unyou Kai Ni
 
Shinyou Kai Ni


and Kaiyo
CA(V)
 
Mogami Kai Ni
 
Suzuya Kai Ni
 
Kumano Kai Ni

 
Takao Kai
 
Atago Kai
 
Choukai Kai Ni

 
Maya Kai Ni
 
Myoukou Kai Ni
 
Haguro Kai Ni

 
Tone Kai Ni
 
Chikuma Kai Ni
CL
 
Noshiro Kai Ni
 
Yahagi Kai Ni B
DD
 
Shiratsuyu Kai Ni
 
Shigure Kai San
 
Harusame Kai

 
Samidare Kai
 
Michishio Kai Ni
 
Asagumo Kai

 
Yamagumo Kai
 
Nowaki Kai
 
Isokaze B Kai

 
Hamakaze B Kai
 
Urakaze D Kai
 
Tanikaze D Kai

 
Yukikaze Kai Ni
 
Akigumo Kai Ni
 
Naganami Kai Ni

 
Okinami Kai Ni
 
Kishinami Kai
 
Asashimo Kai Ni

 
Fujinami Kai
 
Hayanami Kai
 
Tamanami Kai

 
Hamanami Kai
 
Kazagumo Kai Ni
 
Akizuki Kai

 
Suzutsuki Kai
 
Hatsuzuki Kai
 
Shimakaze Kai


and Wakatsuki
USN Fifth Fleet at Majuro
FBB
 
Iowa Kai
 
South Dakota Kai
 
Massachusetts Kai


and New Jersey, North Carolina, Alabama, Indiana
CV
 
CV-12 Hornet


and 6 more CV
CVL
 
Langley Kai


and 7 more CVL
CVE
4 CVE
CA
8 CA
CL
9 CL
DD
79 DD/DE

Information

Quick Info Table

Classification Map Name Fleet Type LBAS Friendly Fleet Fleet Tags Notes
1st Stage Operations E-1 Towards the Q-Base Single Yes TBA   ·   ·  
E-2 Operation Tatsumaki Single
Striking Force
Combined Fleet
Yes TBA   ·   ·  
E-3 Break into the Anchorage! Operation Tatsumaki (Expanded) TBA No TBA   ·   ·   ·  
2nd Stage Operation E-4 TBA TBA TBA TBA TBA Lock limited to Hard Only
  • Once E-4 is cleared, tag restrictions stop getting enforced on every map!

Fleet Locking Table

Tags E-1 E-2 E-3 E-4
(Hard Only)
  1st Fleet
  2nd Fleet
  5th Fleet
  Task Force
  6th Fleet
  3rd Fleet Advance Force
  Vanguard Fleet

Event-Wide Bonus

Soon™

New Mechanics

  • Uniquely on "atoll nodes", it is possibly to deploy the new   Ka-Tsu  and Ka-Tsu Kai 
    • On those nodes, regular oTorp will not work,
    • This can only be deployed by SS, SSV, and the AV Mikuma Kai Ni Toku, Nisshin A, and Mizuho Kai fast,
    • They must carry at least one Ka-Tsu tank,
    • On the "atoll node", ships meeting those requirements will carry out a special opening torpedo attack,
    • In night battle, those ships will additionally trigger the same attack as a cutin,
    • Using several Ka-Tsu tanks on a same ship will make it carry out several of those attacks in a row (day and night),
      • This attack utilizes a new special animation, with the tank climbing the atoll's soil.

New Ships

  SS Drum E-3 Reward
  SS I-41 E-4 Reward
  SSV I-36 E-1 drop
  AS Heian Maru E-2 drop

Returning Ships

A non-exhaustive list of "notable returning ships". Please refer to drop table of each individual map for more complete lists.

  • See below for the full list of returning "Event Only Drops",
  • See uptodate drop database via KCnav, or via Discord bots.
Notable returning ships
[Toggle Names]
(F)BB
 
South Dakota
E-2
 
Washington
E-2 E-2
CV(B/L)
 
Taihou
E-2
 
Intrepid
E-2
 
Saratoga
E-2
 
Hornet
E-2 E-2 E-2
CA/CL
 
Tuscaloosa
E-3
 
Houston
E-3
 
Northampton
E-3
 
Atlanta
E-3 E-3 E-3
DD
 
Fletcher
E-2
 
Johnston
E-2
 
Heywood L. Edwards
E-2
SS
 
Salmon
E-2
 
I-400
E-2
 
Maruyu
E-3
 
I-14
E-3
 
Scamp
E-3 E-3
Aux
 
Jingei
E-1
 
Chougei
E-1
 
Hayasui
E-1
 
Souya
E-1
 
Nisshin
E-2 E-2

New Equipment

  Type 0 Small Reconnaissance Seaplane  Recon Seaplane Recon E-2
  Type 0 Small Reconnaissance Seaplane (Skilled)  Recon Seaplane Recon ?
  Special Type 4 Amphibious Tank   Special Amphibious Tank E-1 & E-2
  Special Type 4 Amphibious Tank Kai   Special Amphibious Tank E-1 & E-2

New Enemy Vessels

Soon™

New Enemy Equipment

Soon™

Friendly Fleets

Friendly Fleets (FF) come with a function that allows players to choose if they want to use a FF to aid them in battle or not. It is possible to choose between using "normal only" or "normal and powerful" FF. Powerful FF have an additional cost of 6 Instant Constructions   for each time they are deployed in a battle (the blowtorches won't be consumed unless a powerful FF appears).

  • Friendly Fleets have not been released yet.

Voice Lines

Soon™

Mechanics

Participation requirements

To take part in any event, a player MUST HAVE at least:

  • A 75% sortie win ratio.
  • 5 empty ship slots.
  • 20 empty equipment slots.

Special Mechanics

In addition to regular Sortie mechanics, events often involve some specific or rarer mechanics :

Map Clearing Medals
Hard
 
Medium
 
Easy
 
Casual
 

Depending of the HQ level, it is possible to choose between:

  • Hard ("operation A", ), at HQ 80+
  • Medium ("operation B", ), at HQ 35+
  • Easy ("operation C", ), at HQ 1+
  • Casual ("operation D", ), at HQ 1+

The map difficulty will directly affect the enemy encounters, making them more numerous, with higher stats, or even replacing weaker ships with stonger ones. Additionaly, will vary:

  • The maps' phases' gauges (HP/TP),
  • The amount of map gimmicks to complete,
  • The LoS requirements,
  • The maps' rewards,
  • The ship Drops.

Changing difficulty is possible but limited:

  • When switching from any "lower" difficulty to any "higher" difficulty, the map will fully be reset.
  • When switching from any "higher" difficulty to any "lower" difficulty, the map will stay in the very same state it was previously, with only +25% of TP/HP being reset on the current phase's TP/HP bar.
    • Gimmicks might also be reset when applicable, notably the debuffs.

Beginning with the second map, difficulty progression rules apply.

  • In order to play a map on Hard difficulty, the prior map must have been completed on either Medium or Hard.
  • In order to play a map on Medium difficulty, the prior map must have been completed on either Easy, Medium, or Hard.

To simulate simultaneity of battles in different locations, Fleet Tags conditions & deployment restrictions are employed.

  • Ships not already tagged will be tagged with the associated tag of the map phase when deployed. This tag will be applied regardless of the difficulty and can't be removed by any measure before the end of the event.
  • One map can use multiple tags, usually separated by phases or fleets.
  • Several maps can share one or more tags.
  • On Medium or Hard difficulty, ships must have either the same tag as the map/phase they are being deployed to, or have no tag at all.
    • This requirement is sometimes waived on certain maps, mostly on the last map of the event where tags only matter on Hard.
    • Once the event is cleared (last map of the EO), all tag restrictions stop getting enforced on every map (tag routing will still apply).

The Combined Fleet (CF), a fleet assembling both the 1st and 2nd fleets, may come back.

  • The CF is only available for the two 1st fleets, where the 2nd fleet can be merged with the 1st one in the "Fleet menu".
  • The CF cannot be used in anything outside of event sorties.
  • 3 different types of CF are available, depending on the map requirements and the current fleet setup.
  • CF with a flagship that carries the  Fleet Command Facility , will be able to make use of the Evacuation mechanic.
    • The evacuation requires an escort destroyer.
    • Only one ship can be evacuated per battle.
The Flagship of the Escorting fleet cannot sink!

The Striking Force Fleet (SF), a fleet with seven ships, may come back.

  • The SF is only available for the 3rd fleet, where an extra 7th ship can be added in the Fleet menu.
  • The SF cannot be used in anything outside of event sorties.
  • A SF with a flagship that carries the  Striking Force Fleet Command Facility , will be able to make use of the Evacuation mechanic.
    • Only one ship can be evacuated per battle.

The Vanguard Formation  can be used.

  • This formation will organize the fleet such that the 2 to 3 last ships protect the 2 to 4 first ships of the Fleet.
  • This formation is available for single and Strike Force fleets made of 4 to 7 ships.
    • The formation makes ships way more evasive in combat, especially DD, and more accurate against DD, especially PT Imps.
    • This formation is available only during the duration of the event, on the event's maps as well as on the regular maps.

NPC Friendly Fleets (FF) may be introduced to the event.

  • FFs act as another unit that appears in particular battles to help aid the fleet when attacking the enemy.
  • It is possible to choose between using "normal only" or "normal and powerful" FF in the main menu.
    • Powerful FFs have an additional cost of 6 Instant Constructions   for each time they are deployed in a battle.
      • The blowtorches won't be consumed unless a powerful FF appears.
    • If activated, one FF is randomly selected from a preset list of fleets to help the fleet.
    • Which ships are in the fleet will influence which FF can help, excluding the FFs containing ships also in the main fleet.
    • The FF will appear at the start of either day or night battle, depending on the node.
  • FFs are usually available sometime after the start of the event, to help Admirals facing difficulties clearing the maps.

Most maps have various bonuses, coming in many shapes. Since most of those bonuses follow the historical formations/tactics used in the relevant operations, they are referred to as "Historical Bonuses". Such bonuses are also found on 7-4 and 7-5.

  • The bonuses can be given to:
    • Ships, including all remodels,
    • Ship types, with all ships of a given type sharing a bonus,
      • In those cases, types do not overlap (e.g. a CLT does not count as a CL),
    • Ships Nationalities, with foreigners (non-Japanese) sharing a bonus,
    • Equipment, with some types or specific ones giving a bonus,
      • It is only applied to the ship they are equipped on,
      • For planes, those bonuses won't work if the plane count is 0, but for the Foreign Plane Bonuses.
  • Then, bonuses can be applied:
    • Map-wide, working on all nodes
    • On some Nodes only, with usually boss or gimmick nodes having some bonuses,
      • Those node bonuses are often split following the map's phases.
    • Against some abyssals specifically,
      • Usually bosses and their escorts,
Bonuses can stack or not between each other depending on the case.
  • Bonuses are either damage, accuracy, and/or evasion,
  • Damage and evasion bonuses are "post-cap",
  • Some gimmicks like the map's phase can further affect the bonuses (usually the Debuff).

  • Completion Gimmicks might be required to further progress the map, demanding certain conditions to be accomplished on a given map to unlock several things :
    • Boss Debuffs, where once the "Last Dance" of the final boss of a given map is reached, its debuffed form can be unlocked.
    • Map phases, where some map areas need to be unlocked, like on 7-2, 7-3, and 7-5.
      • Map areas can either be a path to the next boss, an intermediate path asking for new gimmicks, or a shortcut.
    • LBAS Relocation.
    • Choosing a higher difficulty on an event map will reset it to its initial state.
    • These conditions range from reaching certain nodes, defeating specific nodes, attaining air superiority on certain nodes, and defending against Air Raids. As soon as all the given conditions are met, the map advances to the next phase. Lower difficulties may require fewer conditions to be met to complete the phase. The order in which the gimmicks are completed does not matter.
    • Completing a gimmick will play a "bell" sound once back in the main port (Play Bell Completion Sound Effect).
    • Nodes required to be visited/defeated in gimmicks are highlighted.
  • Special Nodes:
    • Emergency Anchorage Repairs:
    • Enemy Ambush Nodes, "off-route ambush nodes",
       
      Ambush
      • They serve as a "radar check", with fleets lacking enough Surface Radars being off-routed there,
      • The fleet will not be able to fight against the enemy fleet.
    • Airstrike Supported Battle Nodes, ("ASS nodes") "off-route combat nodes",
       
      ASS
      • The enemy fleet will consist of "normal surface enemies" (4-5 SS so far), followed by "air support enemies" (1-2 CVL so far), bringing air support, and that cannot be attacked,
      • By meeting certain conditions, these nodes can be evaded.
    • "Installation Nodes", being most nodes having one or more Installation in it, and were   Barrage Balloons can be deployed.
    • "Atoll Nodes", being some nodes located on atolls, and were   Ka-Tsu tanks 
       
      spacial attack can be triggered.
  • Superfortress Air-Raid Sequence, a QTE where the LBAS is attacked by bombers, and where the player must click on a button at the right moment to obtain better interception, using "Land-based high-altitude interceptors".

Bug: It is possible to save a sunk ship in events:

  • When sinking a ship on a "time-limited event map", by closing the game before the battle ends (before battle result screen is shown), and refraining from logging in until a maintenance in which the time-limited map is removed from the game occurs, upon entering the game after the map is removed, the sunken ship will remain in the game, at 0 HP and with the "Sunk" status.
  • The ship can be repaired as per normal; removing this status, and sortieing it at 0HP will cause it to return to 1HP.
  • Opening the game at any time before the map is removed, or sinking a ship in a normal map will not enact this behavior, regardless of whether a maintenance has occurred or not.
This probably comes from the fact that the game is unable to resolve the battle state due to the map the ship was sunk in, no longer existing. This presumably aborts the game's attempt to check for and delete the sunken ship in question from the roster.

Some error messages you may encounter before a sortie.

  • Do note that:
    • Most errors are "general" and can be seen in many situations,
    • Some errors are event only, being liked to event maps/locks/mechanics.
Original message Translation
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

Farming

LBAS Leveling

It is possible to regain Proficiency for LBAS aircraft on the following spots:

  • Soon™

Resource Farming

Resource Nodes are present on this event and can bring some substantial resources:

  • Soon™

See Also

[edit]Event Only Drops History
Legend: R = Reward, R & D = Reward & Drop, D = Drop, Empty = not implemented yet, N = not dropped
Exclusive Ships 2018 Events 2019 Events 2020 Events 2021 Events 2022 Events 2023 Events 2024 Events
Portrait Name
 
Akizuki
R N N D N D N D N N N N D D D D N N D
 
Prinz Eugen
R D N N N N N N D N D N N D D N N N D
 
U-511
R N N N D N N D D N D N D N D N D N D
 
Amagi
R N N N N D N N N N N N N D N D N N N
 
Katsuragi
R N N D N N N N N N N N D N N D N N N
 
Littorio
R D N N D N N N D N D N N N D N D N D
 
Roma
D D N N D N N N N N D N N N D N D N D
 
Teruzuki
R N D D N D N D N D N N N D N N D D D
 
Graf Zeppelin
D D N N N N N D D D D N D N D N D N D
 
Hatsuzuki
R D N N N D N D D D N N D N N D N N D
 
Iowa
R N N D N N N N N N N N D N D D N N N
 
Pola
R D N N D N N N N N D N N N D N D N D
 
Harukaze
D N N N N D N N D D N N N D N D N N N
 
Aquila
D D N N D N N N D N D N N N D N D N D
 
I-26
D D N N D D N D N D N D N N D D D D N
 
Commandant Teste
R D N D D N N N D N N D N D D N D N D
 
Matsukaze
R D N N N D N D D D N N N D N D N N N
 
I-14
R D N N N N N D N N N N N D N N D D N
 
I-13
D D N N N D N D N N N N N D N N D D N
 
Kasuga Maru
R D D D N D N D D D N D D N N N N N N
 
Gangut
R N N D N N N D D N D N N N N N N N N
 
Shimushu
D D D D N N N D D D D D N D D N D D N
 
Kunashiri
D D D D N D N D N D D D N N D N D D N
 
Etorofu
D D D D D D D D N D D D D D D N D D N
 
Hatakaze
R N N N N D N D D D N D N D N D N N N
 
Richelieu
R D N N D N D N D N D N N N D N D N D
 
Luigi Torelli
D D N D D N N D D N D N D N D N D N N
 
Matsuwa
D D N D N D D D D D D N D D D N N D N
 
Suzutsuki
R N D D N N N D N D N N D D N D D N N
 
Sado
R D N D D D D D D D D D D D D N N N D
 
Tsushima
D D D D D D D D D D N D D D D D D N D
 
I-400
D D N D N N N D N N N D N D D D N D D
 
Hiburi
R D D D D D N D D D N D D D D N N D N
 
Gambier Bay
R N N D N N D D D N N N N D D D D N D
 
Intrepid
R N N D N N N N N N N D N D D D D D D
 
Daitou
D D D D D D N D D D N D D D D N D N D
 
Jervis
D N N N D N N N D N D N D N D N D N D
 
Hamanami
D N D D D D D D D D D N D D D N N N D
 
Tashkent
D N N D D N N D D N N N N N N N N N D
 
Samuel B. Roberts
[EDT 1] N N D N N D N N N N N D D D N D D N
 
Fukae
[EDT 2] D D D D D D D N N N D D D D N N N N
 
Shinyou
R N D D D N D D N D D D D D N D N N
 
Maestrale
R N N D N N N N N D N N N D N D N D
 
Nelson
R N N D N N N D N D N N N D N D D D
 
Gotland
D D D D N D N D N N N N D N N D N D
 
Minegumo
R N D D D D N D N N N D N N N N N
 
Nisshin
R N N N N D N D N N N D N D N D N
 
Hayanami
D D D D D D D D D N D D D N N N D
 
Johnston
D D D N N D N N N N N D D D D D N
 
Giuseppe Garibaldi
R N N N N D N D N N N D N D N N
 
Colorado
R N N N N D D N N D D D N N D N
 
Hachijou
R N D N D N D D D D D D D N D N
 
Ishigaki
D N D N D N D D D D D D D N D N
 
Fletcher
D N D N D N D N D N D D D D D D
 
Duca degli Abruzzi
R N N N N N D N N N D N D N N
 
Janus
R N N N D N D N N N D N D N D
 
Mikura
D D N D N D N D D D N D N N D
 
Grecale
D N N N D N D N N N D N D N D
 
Perth
R N D D D D N D D D N D N N
 
Shinshuu Maru
R N N D D N D D N N D D N D
 
Atlanta
R N N N N N N D N N D D D D
 
De Ruyter
D N D N N N N D N N N D N N
 
Houston
D N D N D N N D N D D D D N
 
Hirato
D D D N D N D D D D D N N N
 
Akishimo
D N D N D N N N D D N D N N
 
Usugumo
R N N N D N D D D D D D
 
I-47
R N D N N D D D N N D N
 
Matsu
R N N N D D N N D D N N
 
South Dakota
R N D N N D D D D D D N
 
Hornet
R N D N N D D D D D D D
 
Jingei
D D D N N D D D D D D D
 
Kaiboukan No.4
D D D D D D D N D D N N
 
Ariake
D N D D N D D N D D N D
 
Helena
D N D N N D N D D D D N
 
Yashiro
D N D N D D D N D N D D
 
Washington
R D D N D N D D D D N
 
Take
R N N D D N N D D N D
 
Scirocco
D N D N N N D N D N D
 
Sheffield
D N D N D N D N D D D
 
Momo
R N D D N N N D N N
 
Northampton
R N N N N D N N D N
 
Honolulu
R N N N N N D D D D
 
I-203
D N D D D N D D N N
 
Makinami
D N N N D N N N N N
 
Suzunami
D D N N D D N D N D
 
Souya (AGS)
D D D D D N D D D N
 
Conte di Cavour
R N N N N N N N D
 
Victorious
R N D N N N D D D
 
Chougei
D D D D D N D D D
 
Kaiboukan No.30
D D D D N D D N N
 
Scamp
R N D N D D D N
 
Shounan
D D D D N D D D
 
Yamashio Maru
R N N D D N N
 
Fuyutsuki
R N N D D N D
 
Ume
D N N D D N N
 
Tamanami
D D N N N N N
 
Hayashio
R N N N N D
 
Maryland
R N D N N N
 
I-201
D N D N N N
 
Kurahashi
D N N N D D
 
Langley
R D N N D
 
Ranger
R D D D D
 
Jean Bart
R N D N D
 
Ukuru
D N D N D
 
Natsugumo
D N N N D
 
Brooklyn
D D D D D
 
Massachusetts
D D D D N
 
Kumano Maru
R D N N
 
Tuscaloosa
R&D D D N
 
No.101 Transport Ship
R D D D
 
Yuugure
D D N D
 
Heywood L. Edwards
D D D N
 
Noumi
D N N D
 
Inagi
R&D N D
 
Shirakumo
R D N
 
Nevada
R&D N D
 
Rodney
R N D
 
Kaiboukan No.22
D N N
 
Asahi
D D N
 
Salmon
D D N
 
C.Cappellini
D D D
 
Javelin
D N D
 
Drum
R N
 
I-41
R N
 
I-36
D N
 
Heian Maru
D D
 
Gloire
R&D
 
Lexington
R
 
Mogador
D
 
Valiant
D
 
Phoenix
D
This table includes all ships that are currently not permanently available outside of events (Limited Time Drops are still counted as "event drops").
  1. Samuel B. Roberts introduced as a quest reward from 5A05 during the Kancolle 5th Anniversary
  2. Fukae introduced as drop in (Phase 1) 2-4 & 6-3 during Spring 2018 Mini-Event
  
Time until event's end:

Early Spring 2024 Event Hub Overview
Introduction & Overview 1st Stage Operations 2nd Stage Operation
E-1 | E-2 | E-3 E-4