Mackerel

Mackerel (Saury, 秋刀魚, さんま, Sanma, or "fish") is an item that can be obtained during Mackerel seasonal mini-events (based on Pacific saury festival). It is obtainable as a map drop, can be exchanged for various items, and is required for completing the events' limited quests. The events usually happen in October - November:
 * 2015 Mackerel Event: October - October  (duration: 3 weeks)
 * 2016 Mackerel Event: October - November  (duration: 2 weeks)
 * 2017 Mackerel Event: September - October  (duration: around 3 weeks)
 * 2018 Mackerel Event: October - ??? (duration: around 2 weeks)

How to Obtain
Known drop conditions:


 * Can be obtained only from specific map nodes. A notification will appear on a drop (see the gallery above).
 * Can drop only on A and S ranks, with a higher drop rate for S ranks.
 * Can drop even when you have no ship slots left.
 * Doesn't prevent normal ship drops. Also can drop without a ship drop.
 * You can't have more than 99 fishes at the same time during the event.

The following two mechanics are likely to affect the drop rates (note that the following info is partially speculative and wasn't properly tested ):


 * Overfishing reduces the drop rates, getting too many fishes within a specific time interval decreases the chances to obtain new fishes.
 * Each node, map and world may have an independent limit. Can be time-dependent.
 * For example, within a short period of time with a given equipment setup 1-5-I can drop 6 fishes at 40-80% rate, than 6 more fishes at 10-30%, after which the rate reduces to 0-20%. Possible countermeasures in this case: 1) farming other 1-5 nodes (F and G), other maps (e.g. 1-1), maps in other worlds (e.g. 3-3), 2) waiting on the node/map "morale".
 * Coastal Defense Ships can be used to increase effectiveness of drop chances.

Special Equipment for Fishing

 * Having the following Special equipment can be used to increase the drops rates of the Mackerel.
 * Combo effects from equipping different pieces of special equipment in one ship does exist, e.g. Searchlight + Sonar + Skilled Lookouts + Type 0 Recon Seaplane on one ship.
 * An official tweet hinted that using [[File:DepthCharge.png]] Depth Charges will cause Overfishing more quickly.

Drops
All listed nodes drop on S ranks, red nodes are known to drop on A ranks (usually at a lower rate). 5-1 I (Boss) has also been reported.
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 * -|2017=
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Exchange

 * Mackerel can be exchanged ("cooked") for items via three different options (cooking styles)
 * You must have the Mackerel available in your Inventory in order to complete the Limited-time Mackerel Quests. DO NOT use your Mackerel before you complete your Quests!

Quests

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