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* In the case of [[Drop List#Limited Time Drops|limited time drops]] on normal maps, they usually overlap or replace existing drop rates.
* In the case of [[Drop List#Limited Time Drops|limited time drops]] on normal maps, they usually overlap or replace existing drop rates.
* Some individual drop rates might also be affected by [[#Drop Caps]], proportionally increasing the rest of the drop rates of the list.
* Some individual drop rates might also be affected by [[#Drop Caps]], proportionally increasing the rest of the drop rates of the list.
+
* Some ships are affected by [[scrap]]ping, notably all DE and some limited ones (''see [[#Scrap Locking|bellow]]'').
* The difficulty ([[event]] only) changing the enemy formations, with better drops being limited to higher difficulties' formations.
* The difficulty ([[event]] only) changing the enemy formations, with better drops being limited to higher difficulties' formations.
**Casual & Easy: limited "rare drops" available,
**Casual & Easy: limited "rare drops" available,
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*Some "mercy/pity mechanic", improving the odds of dropping something after a given amount of attempts.
*Some "mercy/pity mechanic", improving the odds of dropping something after a given amount of attempts.
*Any direct effect of HQ level is currently unproven. However HQ level has an indirect effect as it affects enemy formation.
*Any direct effect of HQ level is currently unproven. However HQ level has an indirect effect as it affects enemy formation.
−
*The fact that a ship was [[scrap]]ped recently.
−
**''See "Scrap Locking" bellow
−
;"Scrap Locking"
+
=Drop Caps=
−
*It is currently believed that a hidden system is put in place to prevent higly active/commited players from obtaining a disproportinately high amount of rare ships, be it for their use or the equipment they provide.
+
The "drop cap" (only applicable for few ships), is when some "rarer/valuable" ships are limited in how many copies can be obtained. It is believed to be mostly node-based, but some reports suggest it can be also world-wide, or even game-wide. It can take the form of a "'''Dupe Cap'''" or an "'''Overfishing Cap'''".
−
*This system targets ships that specifically grant desirable equipment such as Prinz Eugen, Fletcher-class Destroyers, American Battleships, and ships that have other desirable uses such as Destroyer Escorts and Maruyu, replacing them with "alternative drop slots" instead.
+
*This way, the majority of ships can be dropped an infinite amount of times (certain players have 200+ copies of a ship), but certain ships will have an arbitrary limit.
−
*This system's inner workings are not fully understood, however there is substantial evidence of its existence [https://x.com/zekamashinet/status/1713210060938379475] through statistical feasibility.
+
*Ships affected by a cap are notably replaced with "alternative drop slots" instead (''see [[#Drop Theory|below]].
−
*Currently, it is believed the system works in 2 different possible ways:
−
**Scrapping a ship will trigger a flag for a specific node which prevents said node from dropping the ship (i.e. multiple users reported that scrapping Johnston made it impossible for them to obtain Johnston from the 2-3 map boss specifically, whereas she would drop normally from other nodes). This flag is supposedly cleared after an arbitrary time has passed, allowing the ship to be obtained again.
−
**Scrapping a ship would not decrease the "dupe count" of a specific node, meaning that scrapping ships to enjoy a higher drop rate wouldn't be possible (i.e. Iowa drops during the Winter 2018 Event, where no more than a total of 2 Iowas would be obtainable from the last boss node, whether you still had them or not). There are also reports of Destroyer Escort drops behaving in a similar way (i.e. Destroyer Escort drops are limited to a finite number, for example 8).
−
=Drop Caps=
+
The "'''Dupe Cap'''" is for how many duplicates of a ship can be '''possessed at once'''.
−
The "drop cap" (only applicable for few ships), is when some "rarer/more valuable" ships are limited in how many copies can be owned at once ("dupe cap") or on how many can be dropped in a certain period of time ("overfishing cap"). This way, the majority of ships can be dropped an infinite amount of time (certain players have 200+ copies of a ship), but certain ships will have an arbitrary limit:
+
*This can also come in a diminishing drop rate as the amount of duplicates increases, with their drop rate falling to zero when this cap is reached, and being reseted back if the duplicates are "removed" (scrapped, fodder uses, sunk...), unless it is also affected by some "[[#Scrap Locking|Scrap Locking]]".
−
*Unlikely, for [[Akashi]] on [[2-5]], she will drop '''only''' if currently not possessed, meaning that duplicates cannot be dropped here (dupes are still possible on any other location).
+
*Famously, for [[Akashi]] on [[2-5]]'s boss node, she will drop '''only''' if currently not possessed, meaning that duplicates cannot be dropped here (dupes are still possible on any other location).
−
*For the '''"dupe caps"''', some ships will be limited on how many can be owned at once, with their drop rate falling to zero on all locations when this cap is reached.
+
*Usually, the amount of a given ship being possessed will affect the drop rate, the more ships the worse the rate, down to 0 %,
−
**Usually, the amount of a given ship being possessed will affect the drop rate, the more ships the worse the rate, down to 0 %, and being reseted back if the duplicates are "removed" (scrapped, fodder uses, sunk...).
+
*''See [[#Drop Caps List|below]] for a list of the known ships with such a cap.
−
*For the '''"[[#Overfishing Cap|overfishing cap]]"''', there might be a limit on how many of a ship type can be dropped by an account on ALL maps (normal and event) for a given amount of time or period.
+
The "'''Overfishing Cap'''" is for how many duplicates of a ship can be '''dropped in a certain limit quantity and in a certain period of time'''.
−
**''So far only observed for [[Kaiboukan]]s [https://twitter.com/Sashimi91640578/status/1852977074488897829][https://twitter.com/Sashimi91640578/status/1852977245671076129][https://twitter.com/Sashimi91640578/status/1852977384565460998].
+
*''So far only observed for some rarer ships and all [[Kaiboukan]]s [https://twitter.com/Sashimi91640578/status/1852977074488897829][https://twitter.com/Sashimi91640578/status/1852977245671076129][https://twitter.com/Sashimi91640578/status/1852977384565460998].
+
*''See [[#Overfishing Cap|bellow]] for more details.
===Drop Caps List===
===Drop Caps List===
Ships who are known to be limited in how many dupes can be obtained, as of the {{GameUpdates|2024/10/18}} update.
Ships who are known to be limited in how many dupes can be obtained, as of the {{GameUpdates|2024/10/18}} update.
*Do note that this list may be erroneous or not up to date.
*Do note that this list may be erroneous or not up to date.
−
*Some ships were known to be limited to zero dupes when they were introduced, but so far, all ships but Valiant can be duped at least once.
+
*Some ships were known to be limited to zero dupes when they were introduced, but so far, all ships except Valiant can be duped at least once.
*Some ships may also have a diminishing drop rate, but no clear drop cap.
*Some ships may also have a diminishing drop rate, but no clear drop cap.
''Are listed below only ships who have never been recorded as more than a 5th dupe.
''Are listed below only ships who have never been recorded as more than a 5th dupe.
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|}
|}
−
===Overfishing Cap===
+
==Overfishing Cap==
+
Certain ship are limited in how many duplicates can be '''dropped in a certain limit quantity and in a certain period of time'''.
+
*This cap can be further exacerbated by "Scrapping" said ships.
+
+
===Scrap Locking===
+
It is currently believed that there is a system preventing players from obtaining a disproportionately high amount of "rarer/valuable" ships.
+
*This system's inner workings are not fully understood, however, there is substantial evidence of its existence through statistical feasibility: [https://x.com/zekamashinet/status/1713210060938379475].
+
+
Currently, it is believed the system works in three different possible ways:
+
*Scrapping a ship will trigger a flag for a specific node, which prevents said node from dropping the ship (i.e. multiple users reported that scrapping Johnston made it impossible for them to obtain Johnston from the 2-3 limited boss drop specifically, whereas she would drop normally from other nodes). This flag is supposedly cleared after an arbitrary time has passed, allowing the ship to be obtained again.
+
*Scrapping a ship would not decrease the "dupe count" of a specific node, meaning that scrapping ships to enjoy a higher drop rate would not be possible (i.e. Iowa drops during the Winter 2018 Event, where no more than a total of 2 Iowas would be obtainable from the last boss node, whether still having them or not).
+
*A combination of the above-mentioned systems with some dupe. [[DE]] drops are notably suspected to behave similarly (''see [[#DE Drop Cap|below]]'')
+
+
This system seems to target ships that specifically grant desirable equipment such as [[Prinz Eugen]], {{Class|Fletcher}}, [[USN]] battleships, and ships that have other desirable uses such as [[DE]] and [[Maruyu]].
+
+
===DE Drop Cap===
So far, only [[DE]] seem to be affected by the "overfishing cap".
So far, only [[DE]] seem to be affected by the "overfishing cap".