View source for World 1/1-3

{{World/Hub}}
==World 1-3: 製油所地帯沿岸 Coastal Refinery Zone==
{{LabSortieworld
| page = World 1/1-3
| difficulty = ☆ ☆
| item = {{Fuel}}
| exp = Varies
| code = 海上護衛作戦 (Maritime Escort Operation)
| jptext = 製油所地帯沿岸部の海上輸送ラインを防衛せよ！
| entext = Protect the supply lines around our coastal refineries!
}}
===Map Unlocking & Progression===
'''1-3''' is unlocked after clearing [[1-2]].

To clear the map, the boss's flagship must be sunk once.

===Stage Guide===
{{MapBranchingTable
|title = 1-3 Branching Rules
|id = 1-3
|0 -> A/empty, C = 
*Go to A if fleet contains AO or AV
*Go to C if fleet contains CV(L)
*Otherwise, random routing

|A/empty -> D/resource, E = 
*Meet '''ANY''' of the following to go to D
**Fleet contains AO
**DE ≥ 4
*Go to E if fleet only contains SS(V)
*80% to D if fleet contains AV and DD+DE ≥ 4
*Otherwise, random routing

|F -> H/storm, J = 
*Go to H if fleet contains any CV(B), slow BBs (BBV doesn't count)
*Meet '''ANY''' of the following to go to J
**DD ≥ 4
**Fleet contains CL and DD+DE ≥ 4
*Otherwise, random routing (The more CV(L/B) you bring, the higher chance you will go to node H)

|H/storm -> G/resource, I/empty, J = 
*Go to G if fleet contains AO
*Go to J if fleet contains CL and DD ≥ 2, or fleet contains AV
*Otherwise
**If DD ≥ 3, random routing (Very small chance for I)
**If DD ≤ 2, random routing (Very small chance for G)
}}

===Recommended Fleet===
'''2XX, 4DD'''
*{{MapRoute|C|red|F|red|J|red}}
*{{MapRoute|A|blue|D|green|B|blue|E|red|F|red|J|red}}
*XX cannot be (F)BB or CV(B)
* BBV, CVL, CA(V), CL, and AV are recommended for the XX.

===Resource Nodes===
{{MapRoute|D|green|G|green}} are "Normal Resource Nodes" rewarding both Fuel {{Fuel}}.
*''See [[Resource Node|here]] for more details.
{{Gain Modifier}}

====Fuel Farming====
Node {{MapRoute|D|green}} is a good spot to farm fuel {{fuel}}. The recommended fleet is as follows:
*'''[[Kamoi]]/[[Souya]], 4-5DD, 0-1SS(V)'''
*1AV/AO, 4-5DD, 0-1SS(V) (if lacking those AO)
*Route = {{MapRoute|A|blue|D|green|B|blue|E|red}}
The base gain is '''10/15/20''' {{fuel}}.
*As many {{LandingCraft}} [[Landing Craft]] and {{Amphibious Tank}} {{EquipmentLink|Special Type 2 Amphibious Tank|text=Amphibious Tanks}} should be equipped as possible to maximize fuel gain (+3 per craft).
**{{Drum}} {{EquipmentLink|Drum Canister (Transport Use)|text=Drums}} works as an inferior substitute (+2 per drum). 
**Using the aforementioned equipment in the fleet is necessary to outweigh the resource cost of the fleet.
*If lacking enough Amphibious Tanks for SS(V), Drum-capable SS are recommended as a substitute.
*When using an AO, the reach rate is 100%, but is only 80% when using an AV instead.
*Once the first battle is complete, "retreat" and "[[resupply]]" before going back out.

If done correctly, this can result in an outstanding fuel gain that can surpass [[expedition]] gains.
*Using "cheap" ships to refuel in the fleet (such as {{Class|Kamikaze}} and {{Class|Mutsuki}}) will optimize the fuel consumption/farming.
*Alternatively, it is possible to use throwaway DDs with Drums that are never refueled until they are ''critically damaged'', and then scraped to save on resources (do not forget to swap their drums with the new ones before doing this).

{{Map/Footer|1-3|

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}}