Prototype 51cm Twin Gun Mount
[Edit]
No.128 試製51cm連装砲
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 Large Caliber Main Gun (II) (51 cm)Effects:
 +30  +5  +1  -1  Very LongScrap value:
 30  28 (Unbuildable) | |
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| Refittable Ship Types | |
| Coastal Defense Ship | Destroyer |
| Light Cruiser | Torpedo Cruiser |
| Heavy Cruiser | Training Cruiser |
| Aviation Cruiser | Fast Battleship |
| Battleship | Aviation Battleship |
| Light Carrier | Standard Aircraft Carrier |
| Armored Carrier | Seaplane Tender |
| Submarine | Aircraft Carrying Submarine |
| Submarine Tender | Fleet Oiler |
| Repair Ship | Amphibious Assault Ship |
Introduction
改「大和」型、そしてその拡大発展級である超「大和」型の主兵装として開発されている新型戦艦用大口径主砲です。
51cm砲が実現する群を抜いたその火力は、他の戦艦主砲の火力を圧倒します。46cm砲をも凌駕する大きさと重量なため、戦艦級の中でも限られた艦艇のみ、本兵装を装備することが可能です。
"Yamato" kai type, the development of a Super Yamato class main gun have been developed as one of the largest caliber gun ever to be fitted on a warship.
The 51cm guns achieved a firepower that overwhelmed the firepower of the other battleship's main guns. As the gun surpasses even the weight and size of the 46cm guns, only limited battleships are able to equip this gun.
Notes
How To Obtain
Stock equipment of Musashi Kai Ni
Upgradeable from 46cm Triple Gun Mount Kai
From quests: B181 (choice)
Event reward for:
- Winter 2015 Event E-2: Hard
- Spring 2015 Event E-1: Hard
Ranking reward for:
- Jun 2015: 1-5 (x2), 6-20
- Jul 2015: 1-5, 6-20
- Sep 2015: 1-5, 6-20, 21-100
- Oct 2015: 1-5
- Nov 2015: 1-5, 6-20, 21-100
- Jan 2016: 1-5, 6-20
- May 2016: 1-5, 6-20
- Jun 2016: 1-5, 6-20
- Nov 2016: 1-5, 6-20
Updates History
- 2015-02-06: Implemented
- 2015-05-18: Became improvable
- 2021-06-22: Became upgradeable to 51cm Twin Gun Mount
- 2022-06-08: Visible bonuses added
Fit Bonuses
| Ship | Extra Requirement | 
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Yamato-class Kai Ni (Juu) 
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+1 |  +1
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+ 15m Duplex Rangefinder Kai + Type 21 Radar Kai Ni + Skilled Fire Direction Center
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+1 | +1, One-time between Prototype 51cm Twin Gun Mount / 51cm Twin Gun Mount
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+ 15m Duplex Rangefinder + Type 21 Radar Kai Ni OR 15m Duplex Rangefinder Kai + Type 21 Radar Kai Ni + Skilled Fire Direction Center
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+1 | +2, One-time between Prototype 51cm Twin Gun Mount / 51cm Twin Gun Mount
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Other Yamato-class 
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+ 15m Duplex Rangefinder + Type 21 Radar Kai Ni OR 15m Duplex Rangefinder Kai + Type 21 Radar Kai Ni + Skilled Fire Direction Center
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+1 | +2, One-time between Prototype 51cm Twin Gun Mount / 51cm Twin Gun Mount
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Akashi's Improvement Arsenal
| Type | Name | ★ | Resource | Day | 2nd Ship | Note | ||||||||||||
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Sun | Mon | Tue | Wed | Thu | Fri | Sat | |||||
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Prototype 51cm Twin Gun Mount | 0 | 50 | 550 | 950 | 80 | 7/9 | 5/7 | 2x
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X | Y | Y | X | X | X | X | Yamato Kai
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| 6 | 10/15 | 7/10 | 3x
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| 10 | - | - | - | |||||||||||||||
| 0 | 7/9 | 5/7 | 2x
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X | M1 |
M2 |
M1 M2 |
M2 |
X | X | Musashi Kai Musashi Kai Ni
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Upgrades to 51cm Twin Gun Mount .
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| 6 | 10/15 | 7/10 | 3x
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| 10 | 28/51 | 15/18 | 1x 3x  1x 
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