Fall 2013 Event

The Fall 2013 event, 決戦！鉄底海峡を抜けて！, started on November 1^st and lasted until November 27^th 09:00 JST.

Official Twitter

Kongou Kai-2 image

Information from the official Twitter:

1. Event Name 【決戦！鉄底海峡を抜けて！】
2. Six new ships (SS I-19, SS I-8, CL Agano, CL Noshiro, CL Yahagi and BB Musashi) will be added to the game.
3. Kongou and Hiei received second remodeling at level 75. It buffs their stats a little with a new art. However, it increases their fuel consumption to be just a little higher than Nagato. 
4. Some event maps will have a day time battle after the night battle or night battle only. So be ware of enemy torpedo ships and plan your fleet accordingly.
5. Event lasts 20 days from Nov 1st, extended until 11/27.
6. Requires at least 75% sortie win ratio to participate.
   1. At least 5 free ship slots for new girls to join your fleet before sortie.
   2. At least 20 free equipment slots before sortie.
7. New Expeditions and Quests.
8. New equipment, Ju87C Kai. Obtainable from the second new submarine expedition quest (第二次潜水艦派遣作戦).
9. Type 3 sonar and depth charge effectiveness will be increased.

Map details

Before you embark on E-2 and beyond, please remember that Compass and RNG are NOT on your side. So, keep frosty and don't let frustration overcome you. Too many admirals have sunk their ships or run of resources. Rest, calm down, and plan properly if needed. Don't be one of them.

E-1 - サーモン諸島海域 (Solomon Islands)

E-1

E-1 Map

• Focused on day battle
• Boss:(Node G) Battleship Ru-Class Flagship
• Unlike regular sorties, any damage dealt to the boss will affect an overall health gauge, which requires several sorties to fully deplete it. However, you must sink the boss in order to clear the map, otherwise the health gauge will remain at zero, instead of being destroyed. Boss health of this map does not regenerate.
• Friendly for newer admirals
• Difficulty will be around that of World 2
• Rewards I-19 upon clearing

Tips

• Have at least 1 DD or 1 CL (e.g Isuzu Kai 2) fully equipped with depth charges and sonars. Node B consists of 1-3 submarines only.
• Node B has submarines while node C has light aircraft carriers. Plan accordingly.
• Recommended formation: line abreast on node B and line ahead on all other nodes.

E-2 - ルンバ沖海域 (Lunga Point)

E-2

E-2 Map

• Focused on night battle (start battle at night)
• Boss:(Node K) Anchorage Demon
• Boss health does not regenerate
• Friendly for newer admirals
• Day battle condition for node J and K (dead end and boss): enemy elite DD survived 
• Rewards CL Noshiro upon clearing

Branching rules

• B [math]\displaystyle{ \longrightarrow }[/math] E if you have 3+ BB

Tips

• Bring your entire fleet sparkling.
• Use a fleet of DD/CL/CLT/CA and equip them so that they can trigger double-attack. Many players find Double-attack more useful than cut-ins because it almost always guarantees a critical which one-hits most ships, including the boss. See combat on double-attack and cut-ins requirement.
• If you want to conserve resources, use a SS as your flagship and and equip her with 2 turbines. However, reaching the boss is difficult because enemy CL have depth charge/sonar equipped.
• Recommended Formation: line abreast on non-boss nodes and line ahead on boss node. line abreast on boss node can be useful if your ships have barely taken damage and want to reduce the likelihood of destroying the two elite DD.
• Recommended Equipment: Sets of equipment which trigger double-attack with radar/turbine on the remaining slot(s).
• If you end up at E, the ASW formation is ideal for handling the subs waiting there.

E-3 - サンタクロース諸島海域 (Santa Cruz Islands)

E-3

E-3 Map

• Focused on day battle
• Starting from this map, boss health will regenerate. E3 boss health regenerates at a rate of 1.5%/hour and complete boss kill removes 20% of the health bar.
• Boss:(Node J) Armored Carrier Princess
• Boss health will NOT stop regenerating once the bar is fully depleted. It must be killed one more time to win (if you depleted the Boss' health and you did not sink the boss during day, you can try to sink it during night battle and it will clear the stage).
• Only for experienced admirals but new admirals should still try after leveling up and saving up some resource for some time.
• Rewards equipment package (furniture craft item, emergency repair team, emergency repair goddess, 53cm oxygen torpedo)

Branching rules

• A certain fleet formation is needed in order to reach the boss (or else you'll get sent to node G, H, or I), so far the confirmed ones are:
• 「CVLx1 CVx2 BBx1 CLTx2」 
• 「BBVx1 BBx1 CVx2 CLTx2」
• 「BBVx1 BBx1 CVx2 CLTx1 DDx1」
• 「BBVx1 BBx1 CVx2 CAx1 DDx1」
• 「BBVx2 CLTx2 CVx2」
• 「DDx1 BBx1 CLTx2 CVx2」
• Possible alternative branching rules: having at least one CAV or BBV will provide a chance to jump from the north route to the south route, and vice versa.  In addition, at node E, any composition with 2 or more non-aviation battleships goes directly to I.^[1]

出現場所	パターン	出現艦船	陣形
A： 敵護衛空母群	Pattern 1	CVL nu-class elite、CVL nu-class elite、CVL nu-class elite、CA ri-class flagship、DD ro-class flagship、DD ro-class flagship	輪形
	Pattern 2	CVL nu-class elite、CVL nu-class elite、CA ri-class elite、CL he-class flagship、DD ro-class flagship、DD ro-class elite	輪形
	Pattern 3	CVL nu-class elite、CVL nu-class elite、CL ho-class flagship、DD ha-class flagship、DD ro-class elite、DD ro-class elite	輪形
B： 敵巡洋戦隊	Pattern 1	CA ri-class elite、CA ri-class、CL he-class elite、DD ni-class、DD ha-class、DD ha-class	単縦
	Pattern 2	CA ri-class elite、CA ri-class、CA ri-class、CL to-class elite、DD ha-class、DD ha-class	単縦、複縦
C： 敵前衛艦隊	Pattern 1	CL he-class flagship、CA ri-class elite、CA ri-class elite、CL ho-class elite、DD ha-class elite、DD ha-class elite	単縦
	Pattern 2	CA ri-class flagship、CA ri-class elite、CL he-class flagship、DD ha-class elite、DD ha-class elite、SS ka-class elite	単縦、複縦
D： 敵迎撃艦隊	Pattern 1	CL he-class flagship、CA ri-class elite、CA ri-class、CA ri-class、DD ha-class、DD ha-class	単縦
	Pattern 2	CL ho-class flagship、CA ri-class、CA ri-class、DD ha-class elite、DD ro-class、DD ro-class	単縦
E： 敵任務部隊	Pattern 1	CV wo-class elite、BB ru-class elite、CL ho-class flagship、DD ni-class、DD ha-class、DD ha-class	輪形
	Pattern 2	CV wo-class elite、CA ri-class elite、CL ho-class flagship、DD ni-class、DD ha-class、DD ha-class	輪形
	Pattern 3	CV wo-class elite、CA ri-class、CL ho-class flagship、DD ni-class、DD ha-class、DD ha-class	輪形
F：	Pattern 1	No battle
G： 敵増援任務部隊	Pattern 1	CV wo-class flagship、BB ta-class elite、BB ta-class、CL he-class flagship、DD ha-class elite、DD ro-class elite	輪形
	Pattern 2	CV wo-class flagship、BB ta-class elite、CL(t) chi-class elite、CL(t) chi-class、DD i-class elite、DD i-class elite	輪形
H： 敵増援任務部隊	Pattern 1	CV wo-class flagship、BB ru-clas elite、BB ru-class、CL he-class flagship、DD ro-class elite、DD ro-class elite	輪形
	Pattern 2	CV wo-class flagship、BB ta-class elite、CL(t) chi-class elite、CL(t) chi-class、DD i-class elite、DD i-class elite	輪形
	Pattern 3	CV wo-class flagship、BB ta-class elite、BB ta-class elite、CL he-class flagship、DD ha-class elite、DD ro-class elite	輪形
I： 敵機動部隊支援群	Pattern 1	Armored Carrier Demon、CV wo-class elite、CV wo-class elite、BB ta-class flagship、DD ro-class elite、DD ro-class elite	輪形
	Pattern 2	Armored Carrier Demon、CV wo-class flagship、CV wo-class flagship、CL he-class flagship、DD ni-class、DD ni-class	輪形
	Pattern 3	Armored Carrier Demon、CVL nu-class elite、CVL nu-class elite、BB ta-class flagship、DD ha-class flagship、DD ro-class elite	輪形
J：敵機動部隊主力群	Pattern 1	Armored Carrier Princess、CVL nu-class elite、CVL nu-class elite、BB ta-class flagship、DD ha-class elite、DD ha-class elite	輪形
	Pattern 2	Armored Carrier Princess、CV wo-class elite、BB ta-class elite、CL ho-class flagship、DD ni-class elite、DD ni-class elite	輪形
	Pattern 3	Armored Carrier Princess、CV wo-class flagship、BB ta-class elite、CL he-class flagship、DD ni-class elite、DD ni-class elite	輪形

Tips

• ​Recommended Formation:
  • ​If your fleet has high AA, line abreast on node C (enemy SS) and line ahead on all other nodes.
  • If your fleet has low AA, use ring formation on node A, E, G, H, and I because there are CV and CVL. Line ahead for boss node J.
• Recommended Equipment:
  • For CV/CVL: air superiority fighter (green) planes for AA. Dive bomber (red) planes are better than torpedo bomber (blue) planes because it deal more damage against BB and CV. A recon (yellow) plane is enough in your fleet, but not really necessary.

E-4 - アイアンボトムサウンド (Ironbottom Sound)

E-4

E-4 Map

• 

  E-4 day battle clear

• 

  E-4 day battle clear

• 

  E-4 night battle clear

• Focused on night battle (start battle at night)
• Boss:(Node I) Airfield Princess
• Boss health regenerates at a rate of 2.1%/hour and complete boss kill removes 17.2% of the health bar.
• Boss health bar will keep regenerating even when the bar has been fully depleted.
• Only for experienced admirals
• Night battle and the following day battle is considered as ONE battle. So, don't worry if you have heavily damaged ships at night.
• Day battle won't occur if both the second and third ships in the enemy fleet are heavily damaged or sunk. In other words, at least one of these two ships must be moderately damaged at most.
• Type 3 ammo deals bonus damage against Airport Boss (Historical reference to Henderson Airfield). You WILL need it to hit above ~50 damage with BBs. Most player typically went with four type 3 ammo for the boss battle.
• Rewards I-8 upon clearing.

Branching rules

• C [math]\displaystyle{ \longrightarrow }[/math] F if you have 2 Kongou-class BBs
• D [math]\displaystyle{ \longrightarrow }[/math] G if you have 3+ BB

Tips

• To increase the chances of your ships surviving with enough health, use line abreast on non-boss nodes and line ahead on boss node.
• Armored Carrier Princess awaited you at Node H
• Recommended equipment:
  • Sets of equipment which trigger double-attack with Type 3 ammo on the remaining slots. If you don't have Type 3 ammo, use turbines/radars to improvise. 
  • For Ooi/Kitakami, equip midget sub on the last slot (even though torpedoes don't hit the boss) in order to kill other enemies if you trigger day fight.
  • For BB, equip each one with 46cm main cannon so they can hit the boss' planes if you trigger day fight.
• If you want to conserve resources or you're running out of resources, a full DD or 4DD 2CLT fleet can be used to deplete the bosses HP to 0. Equip them to trigger double-attack and use line abreast on all nodes and Line Ahead on boss nodes. Note you won't be able to use the shortcut (C -> F) with this fleet setup.
• Stay frosty. The final kill might be hard. Don't take too much risk.

E-5 - サーモン海域最深部 (Ironbottom Sound, Final Stage)

• Unlocked after clearing E-4
  

  E-5
• Boss:(Node K) Battleship Princess
• Boss health regenerates at a rate of 2.9%/hour and complete boss kill removes 14.5% of the health bar.

E-5 Map

• Boss health bar will keep regenerating even when the bar has been fully depleted.
• Focused on night battle
• Boss fight starts as normal (day + night).
• Rewards Musashi upon clearing

Branching rules

• B [math]\displaystyle{ \longrightarrow }[/math] D if your fleet has only high-speed ship (no Nagato-class, Fusou-class, etc) with 2 Kongou-class ships
• B [math]\displaystyle{ \longrightarrow }[/math] E if your fleet is only low-speed ships.
• A [math]\displaystyle{ \longrightarrow }[/math] B If your fleet is either full high-speed or low-speed.
• A [math]\displaystyle{ \longrightarrow }[/math] C If your fleet is mixed.

Tips

• Equip one of your ships with any type of Radar to lessen the effect of whirlpool at H. More radars in your fleet will further reduce the ammo drain effect, to about 12-14 ammo with 3 radars in the fleet.
• Many bosses appeared in this point. Anchorage Princess did in node A. Southern War Demon did in node E. Southern War Princess did in node I& J. Armored Carrier Demon & Armored Carrier Princess did as escort ships in the boss node.
• Boss node features A LOT of airplanes. Bring your type 3 ammo and anti-air weapons.
• 6 fast ships guarantees a boss fight after 3 battles. 
• TWO Kongou-class + 4 fast ships composition may not reach the boss but only need to fight 2 battles before boss
• A mixture of high and low speed ships is not recommended as you need to fight 3 battles while boss fight is no guranteed.
• Put your KTKM and Ooi at position 5 and 6 so that the first 4 ships can clear out the other enemies thus increasing the chance of hitting the boss at night
• Emergency repair is not necessary since one heavily damaged ship may reduce your firepower enough that you can hardly do any harm to the boss
• When in doubt, 4 SS can help to bring down the gauge before the main fleet move in for the final kill.
• Use Dual line for the 1st node and Vertical line for the 2nd node when using the two-Kongou shortcut. The added firepower of the Vertical line helps against the elite bb

More information

• Obligatory day battle advance after night battle (counted as one battle and only happen when certain conditions are met)
• Support fleet available for day battle (expedition 109,110)
• Yuugumo-class DD, Maikaze and Hatsukaze are possible to be dropped from boss node of earlier part of event map
• Suzuya, Kumano, Shoukaku, and Zuikaku are possible to be dropped from boss node of later part of event map
• Nagato, Zuihou, and Mikuma are possible to be dropped from boss node of event map (very small chance)
• Agano drops from E-3, E-4 and E-5 boss nodes. finish the boss battle with S rank for the highest chance.
• Yahagi drops at the E-5 boss nodes for A and S rating. The rate is reported to be 1% for A and 2% for S

See also

• Wikiwiki entry on event 「決戦！鉄底海峡を抜けて！」