Fleet Oilers (AO) can carry {{Item/Icon|Underway Replenishment|size=30px}} {{EquipmentLink|Underway Replenishment}}s that will restore fuel and ammo mid-sortie when consumed.
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* The cost of the resupply will be deducted from the stockpile.
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* The resupply cannot be activated when having insufficient {{Fuel}} fuel or {{Ammo}} ammo.
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* The amount of {{Fuel}} fuel and {{Ammo}} ammo resupplied depends on
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**The fleet type (single or combined)
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**How many Resupplies are carried.
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The resupply rates are as follow:
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{| class="wikitable" style="text-align: center;"
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!{{Item/Icon|Underway Replenishment|size=30px}} Used
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!Single Fleet
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!Combined Fleet
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|-
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|1
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|25 %
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|15 %
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|-
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|2
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|36 %
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|27.5 %
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|-
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|3
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|47 %
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|40 %
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|}
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Is mechanic should only be used to avoid [[Accuracy, Evasion and Criticals#Evasion_Formulas|Fuel penalty]]