[Edit]
No.281 51cm連装砲
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 Large Caliber Main Gun (II) (51 cm)Effects:
 +32  +5  +2  +1  -1  Very LongScrap value:
 30  28 (Unbuildable) | |
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| Refittable Ship Types | |
| Fast Battleship | Battleship |
| Aviation Battleship | Standard Aircraft Carrier |
| Armored Carrier | Light Carrier |
| Heavy Cruiser | Aviation Cruiser |
| Light Cruiser | Torpedo Cruiser |
| Training Cruiser | Destroyer |
| Coastal Defense Ship | Submarine |
| Aircraft Carrying Submarine | Seaplane Tender |
| Fleet Oiler | Submarine Tender |
| Repair Ship | Amphibious Assault Ship |
Introduction
大和型戦艦の発展強化型への搭載が検討されていた大口径大型用戦艦主砲、その完成版です。最大最強の艦艇搭載用砲熕兵装となる本砲は、改装強化された大和型等で運用可能です。
実戦配備されることのなかった本砲で、海原で一斉射を！
Notes
How To Obtain
Upgradeable from Prototype 51cm Twin Gun Mount
Event reward for:
- Winter 2018 Event E-7: Hard, Medium
Ranking reward for:
- Jan 2021: 1-5 (★+2)
Updates History
- 2018-02-17: Implemented
- 2018-03-23: Became improvable
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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51cm Twin Gun Mount | 0 | 100 | 700 | 950 | 200 | 20/25 | 7/8 | 4x
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✓ | X | X | X | X | ✓ | ✓ | Musashi Kai Ni | |
| 6 | 25/50 | 10/13 | 4x
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| 10 | - | - | - | |||||||||||||||