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15.5cm Triple Secondary Gun Mount
|Coastal Defense Ship||Destroyer|
|Heavy Cruiser||Training Cruiser|
|Aviation Cruiser||Fast Battleship|
|Light Carrier||Standard Aircraft Carrier|
|Armored Carrier||Seaplane Tender|
|Submarine||Aircraft Carrying Submarine|
|Repair Ship||Amphibious Assault Ship|
Although designed to be a part of the cruiser's main battery, it saw a more practical use as the battleship's secondary armament.
The Yamato-class was designed with this, for potential use as an anti-aircraft gun, however, its combined ability and performance were outstanding enough to be used as the battleship's secondary armament.
However, the turret section's armor was very thin, resulting in various rumors about it being the Yamato-class' Achilles' heel when pointed out.
How To Obtain
From quest: C66 (x2, choice)
- 2013-04-23: Implemented with initial game release
- 2017-06-23: Became improvable and upgradeable to 15.5cm Triple Secondary Gun Mount Kai
- 2022-06-01: Became possible to equip in Yamato-class Kai Ni
s expansion slots
- 2022-06-08: Visible bonuses added
|+ 15m Duplex Rangefinder + Type 21 Radar Kai Ni OR 15m Duplex Rangefinder Kai + Type 21 Radar Kai Ni + Skilled Fire Direction Center||+1||+1, One-time|
Akashi's Improvement Arsenal
|15.5cm Triple Gun Mount (Secondary)||0||10||90||120||0||2/2||2/3||-||M||X||X||X||X||Y
|Musashi Kai Ni can NOT improve this gun.|
Upgrades to 15.5cm Triple Gun Mount Kai (Secondary).
According to here, the Mogami-class and eventually the Tone-class were supposed to have the gun, but when the practical use was seen in Yamato-class and Oyodo, it then remained as part of the battleship's main weaponry. One factor for the gun design change was that the gun was supposed to have an additional 75 degrees for AA firing on top of the main 45 degrees for general firing, but this was switched to +55 degrees for the reasoning that it was too inefficient.
The "Achilles' heel" portion refers to the relatively inferior armor thickness of the turret part, albeit being colossally improved compared to casemate guns of other Japanese battleships (Fuso-class to Nagato-class).