Conclusion
Recommended fleet: 1 battleship, 1 standard carrier, 1 light carrier, 1 light cruiser and 2 destroyers. By the routing rules, this fleet heads for the boss with high probability whichever way the first fork sends it, with three battles before the boss.
What matters most: enough fighter power to beat the enemy carriers on the way (over 84 for Air Superiority), retreating whenever a ship is heavily damaged, and a composition the compass likes.
Why it's hard: every route makes you fight an enemy carrier group, and a fleet stacked with battleships and carriers is either sent off course or forced through an extra fight before the boss.
What You Need
The fleet
| Ship | Japanese (romaji) | Why it's here |
|---|---|---|
| Battleship ×1 | 戦艦 (Senkan) | Firepower and armor for the boss, which is up to three enemy battleships in Line Ahead. |
| Standard carrier ×1 | 正規空母 (Seiki Kūbo) | Most of your fighters and bombers. Wins the air battle against the enemy carrier groups on the way. |
| Light carrier ×1 | 軽空母 (Kei Kūbo) | Extra planes, and the key to routing: at the second fork (F) a light carrier plus two destroyers points you toward the boss, and on the other branch (I) a light carrier plus a light cruiser does the same. |
| Light cruiser ×1 | 軽巡洋艦 (Keijun'yōkan) | Needed for the routing on the southern branch (nodes I and L). |
| Destroyer ×2 | 駆逐艦 (Kuchikukan) | Two destroyers lock the southern branch onto the boss path (K → L → boss) and help at F. |
Ship levels: there's no level requirement to sortie, but the Japanese wiki notes that the flagship-class enemies that appear from this map on are hard to beat without remodeled (改, Kai) and modernized ships. Remodel your fleet before you start.
Equipment
- Carrier fighters (艦上戦闘機, Kanjō Sentōki; shown as 艦戦, Kansen) on both carriers. The highest enemy fighter power before the boss is 56, so you want more than 84 for Air Superiority (航空優勢, Kōkū Yūsei) and more than 168 for Air Supremacy (制空権確保, Seikūken Kakuho). Check your total with the Air Superiority Calculator.
- Main guns on the battleship — the biggest ones it can carry — and a reconnaissance seaplane (水上偵察機, Suijō Teisatsuki). The boss fleet has no carriers, so you'll hold the air there, which lets a battleship with a seaplane use artillery spotting (弾着観測射撃, Danchaku Kansoku Shageki).
- Radar (電探, Dentan) on a destroyer or the light cruiser if you have spares. The northern branch passes a whirlpool (うずしお, Uzushio) that drains fuel, and radar reduces how much you lose.
- Optional: Damage Control (応急修理要員, Ōkyū Shūri Yōin) saves a ship from sinking once. You don't need it if you follow the retreat rule.
Not available here: 2-4 doesn't allow support fleets or land-based air squadrons, so everything rides on your six ships.
Step by Step
- 1From the home port (母港, Bokō) open Organize (編成, Hensei) and set up the fleet above. Put the battleship in slot 1 — the flagship can't sink.
- 2Load the carriers with fighters first, then check that your fighter power is over 84 with the calculator.
- 3Resupply (補給, Hokyū) everyone and Repair (入渠, Nyūkyo) any damage. Use an Instant Repair bucket (高速修復材, Kōsoku Shūfuku-zai) if you're in a hurry. Never sortie with a damaged ship.
- 4Tap Sortie (出撃, Shutsugeki), pick sortie again, then World 2 → 2-4, named 沖ノ島海域 (Okinoshima Kaiiki). Don't confuse it with 2-5, 沖ノ島沖 (Okinoshima-oki) — the names differ by one word.
- 5Choose Line Ahead (単縦陣, Tanjūjin) against surface fleets. Against the enemy carrier groups, which come in a ring formation, Line Ahead is still a reasonable default; Diamond (輪形陣, Rinkeijin) trades firepower for anti-air.
- 6After every battle, check each ship's damage. If anyone is heavily damaged (大破, Taiha), choose Retreat (撤退, Tettai). Otherwise choose Advance (進撃, Shingeki).
- 7Skip night battle on normal nodes (追撃せず, Tsuigeki sezu). Take it at the boss (夜戦, Yasen) if the enemy flagship is still alive — your battleship and light cruiser can still land big hits at night.
- 8Win the boss battle to clear the map.
Why the compass sends you off course
The compass (羅針盤, Rashinban) isn't fully random — your fleet composition sets the odds at each fork. Node letters below follow the Japanese wiki; the game itself doesn't show them.
| Fork | What the routing data says | What it means for you |
|---|---|---|
| After the 1st battle (B) | 3+ battleships and standard carriers → node C (a whirlpool) | You'll lose some fuel. Radar reduces the loss. |
| After the 2nd battle (F) | A light carrier, or 2+ destroyers, leans toward the boss side (J). No light carrier and ≤1 destroyer → node A, the sortie ends. | The most common reason a battleship-heavy fleet never sees the boss. |
| Node J | 4+ battleships and carriers → L; exactly 3 → M; 2 standard carriers → M | Both lead toward the boss, but via different fights. |
| Node L | Exactly 4 battleships and carriers → M (an extra carrier fight). A light cruiser plus 2 destroyers, or ≤2 battleships and standard carriers, → straight to the boss. | A 2 BB + 2 carrier fleet fights at M before the boss, which is why heavy damage before the boss is so common. |
With the recommended fleet: the northern branch runs B → C → F → J → M → boss, and the southern branch B → G → H → I → K → L → boss — three battles before the boss either way. F and I each carry a small chance (roughly 5–10%) of sending you elsewhere. There's also a fixed two-battle route for 1 heavy cruiser, 1 light cruiser and 4 destroyers, but it needs well-leveled, well-equipped light ships, so it's not ideal for a first clear.
Common Mistakes
- 1Ignoring air power. Whichever route you take, you'll fight at least one enemy carrier group led by a flagship Wo-class carrier. Lose the air battle there and you reach the boss already damaged. Bring enough fighters to win that fight.
- 2Advancing with a heavily damaged ship. A heavily damaged ship other than the flagship can sink if it's hit again, and a sunk ship is gone for good with its equipment. Retreat, repair, and try again. (How sinking works)
- 3Treating the compass as pure luck. If you keep ending at the same wrong node, the fix is almost always composition — see the routing table above.
- 4Stacking every battleship and carrier you own. Without a light carrier or destroyers you're sent off course at F, and with four big ships you take an extra carrier fight at M, so raw power isn't the whole answer.
- 5Forgetting to resupply between attempts. Ships low on fuel or ammo fight worse, and the whirlpool takes fuel too.
- 6Running out of resources. A battleship-and-carrier fleet is expensive. Keep expeditions running while you repair — the Expedition Requirements page shows what you can send.
FAQ
Do I need max-level ships?
There's no level requirement, but remodeled and modernized ships make a big difference against the flagship-class enemies here. Composition, fighters and retreating at the right time matter as much as level.
Which formation should I use at the boss?
Line Ahead (単縦陣, Tanjūjin). The boss fleet is surface ships only — up to three battleships, also in Line Ahead — so anti-air formations just cost you firepower there.
Why do my attacks miss so often?
Many of the enemy escorts on this map are late-model destroyers (後期型, Kōkigata), which dodge a lot. Every miss gives the enemy another turn to shoot back, which is part of why damage piles up on the way to the boss. Higher-level ships and better guns help.
Why do my runs end after the second battle?
At that fork (node F), a fleet with no light carrier and one destroyer or fewer is sent to node A, which ends the sortie. The recommended fleet has both a light carrier and two destroyers.
How much fighter power do I need?
The strongest enemy air before the boss is 56, so aim for more than 84 (Air Superiority). More than 168 gets Air Supremacy. The boss fleet has no carriers.
Can I bring support fleets or land-based air?
No — neither can be used in World 2.
What does clearing 2-4 unlock?
It's one of the two maps (with 3-2) you need to clear before 3-3 appears, and 2-5 — an Extra Operation map — comes after it in World 2.
Is there a reason to come back after clearing it?
Yes. A quarterly quest, 沖ノ島海域迎撃戦 (Okinoshima Kaiiki Geigekisen), asks for two S-rank boss wins here and rewards a Mamiya (間宮) food supply ship item. 2-4 is also the only regular map with a node that hands out Instant Repair buckets.
What do the damage labels mean?
小破 (Shōha) light, 中破 (Chūha) moderate, 大破 (Taiha) heavy. Only heavy damage means you must retreat.
Continue reading
More KanColle guides
KanColle guide home · 1-5 Guide: Fleet and Anti-Submarine Tips · 1-6 Guide: Route and Fleet · 2-5 Guide: North and South Routes · Construction: Build Time Lookup & Recipes · Daily Quests: Full List and Routine · Dock Full? Expanding Space and What to Scrap · EXP Calculator · Equipment Development Recipes · Equipment Improvement (Akashi's Arsenal) · Event Difficulty Explained · Event Ship Locks (Tags) Explained · Exercises (PvP) Explained · Expedition Efficiency Calculator · Expedition Requirements: Every Expedition · Fatigue and Sparkling Explained · Fleet Builder · Fleet Speed: Slow, Fast, Fast+ and Fastest · Heavy Damage: When to Retreat · How to Get Akashi · How to Get Destroyer Escorts · How to Remodel (Kai, Kai Ni) · How to Unlock the 2nd, 3rd and 4th Fleet · Land-Based Air Squadrons for Beginners · Marriage (Kekkon Kakko Kari) Explained · Playing KanColle Without Japanese · Quest Not Completing? Common Reasons · Routing Explained: How the Compass Decides · Running Out of Resources? How to Recover · UI Translation: Every Menu Button Explained · Which Ships to Remodel First · Your First Event: How to Prepare · Your First Week as a New Admiral