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)

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".
 * Special equipment can be used to increase the drops rates:
 * Known equipment: [[File:Searchlight.png]] Searchlights (small or large), Sonars, [[File:Ssp_c.png]] Skilled Lookouts, [[File:DepthCharge.png]] Depth Charges.
 * Combo effects from equipping different pieces on one ship may exist, e.g. Searchlight + Sonar + Skilled Lookouts on one ship.

Drops
All listed nodes drop on S ranks, red nodes are known to drop on A ranks (usually at a lower rate). 2016= 5-1 I (Boss) has also been reported.
 * -|2015=

Exchange
Mackerel can be exchanged ("cooked") for items via three different options (cooking styles):

Quests
2016=