Changes

{{EquipmentInfo|36}}

{{EquipmentInfo|36}}

==Introduction==

==Introduction==

遠距離砲撃戦における秘密兵器「九一式徹甲弾」。<br>

遠距離砲撃戦における秘密兵器「九一式徹甲弾」。<br>海中突入後急激に向きを変え、魚雷のように敵艦水線下に突き進み、喫水下を破砕する特殊徹甲弾です。<br>水中弾効果を高める形状設計のため、空気抵抗も減少して射程も延伸します。<br>戦艦・航空戦艦等が使用可能。

海中突入後急激に向きを変え、魚雷のように敵艦水線下に突き進み、喫水下を破砕する特殊徹甲弾です。<br>

水中弾効果を高める形状設計のため、空気抵抗も減少して射程も延伸します。<br>

戦艦・航空戦艦等が使用可能。

''A long-range bombardment weapon known as the secret weapon "Type 91 Armor-Piercing Shell". This type of ammunition will spin rapidly after exiting the gun's barrel, enters the water, and penetrate the target's armor below the waterline like a torpedo, crushing the hull of the ship. The shell's shape enhances underwater penetration while also improving the range by decreasing air resistance. Available for Battleship (BB), Aviation Battleship (BBV) etc.''

''A long-range bombardment weapon known as the secret weapon "Type 91 Armor-Piercing Shell".<br>This type of ammunition will spin rapidly after exiting the gun's barrel, enters the water, and penetrate the target's armor below the waterline like a torpedo, crushing the hull of the ship.<br>The shell's shape enhances underwater penetration while also improving the range by decreasing air resistance.<br>Available for Battleship (BB), Aviation Battleship (BBV), etc.''

==Notes==

==Notes==

<div class="mw-collapsible"><h3>How To Obtain</h3>

===How To Obtain===

<div class="mw-collapsible-content">

'''Buildable'''

'''Buildable'''

'''From quests: '''[[Quests#B129|B129]] (x2, choice)

'''From quests:''' [[Quests#B129|B129]] (x2, choice)

''From limited-time quests: ''[[Quests/Seasonal#SB41|SB41]] (x3, choice)

''From limited-time quests:'' [[Quests/Seasonal#SB41|SB41]] (x3, choice)

===Uses===

 

<div class="mw-collapsible"><h3>Uses</h3>

<div class="mw-collapsible-content">

'''Used to improve''' {{Equipment/Link|Type 91 Armor Piercing Shell}}, {{Equipment/Link|Type 1 Armor Piercing Shell}}

'''Used to improve''' {{Equipment/Link|Type 91 Armor Piercing Shell}}, {{Equipment/Link|Type 1 Armor Piercing Shell}}

'''Used by quests: '''[[Quests#F41|F41]]

'''Used by quests:''' [[Quests#F41|F41]]

 

 

<div class="mw-collapsible><h3>Updates History</h3>

===Updates History===

<div class="mw-collapsible-content>

* '''2013-04-23: Implemented''' with initial game release

* '''2013-04-23:''' '''Implemented''' with initial game release

* '''2014-07-28:''' Became possible to equip on [[FBB]]

* '''2014-07-28:''' Became possible to equip on [[Fast Battleship|FBB]]

* '''2014-10-10:''' [[Damage Calculations#Armour-Piercing Modifier|Armor-Piercing Modifier]] added

* '''2014-10-10:''' [[Damage Calculations#Armour-Piercing Modifier|Armour-Piercing Modifier]] added

* '''2015-01-23:''' Became '''improvable''' and '''upgradeable''' to {{Equipment/Link|Type 1 Armor Piercing Shell}}

* '''2015-01-23:''' Became '''improvable''' and '''upgradeable''' to {{Equipment/Link|Type 1 Armor Piercing Shell}}

==Akashi's Improvement Arsenal==

==Akashi's Improvement Arsenal==