[Edit]
No.1 12cm単装砲
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 Small Caliber Main GunEffects:
 +1  +1  ShortScrap value:
 1  1 (Buildable) | |
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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
旧型の小型砲です。
旧型駆逐艦に標準的主砲として搭載されました。
装填・操砲も人力ですが、シンプルな構造で経済性も高く、駆逐艦や海防艦等の主砲として、長く使われました。
対空射撃には不向きです。
"The older main gun for small vessels. Equipped as standard weapon on old destroyers. Both loading and rotation was hand-operated, but with its simple construction and low cost, it served a long time as main weapon of destroyers and escorts. Not intended for anti-air firing."
This gun's basic structure was based on the British QF 4.7in. Mk.IV gun, which was later produced domestically in Japan. The barrel of this gun was later mated to a high-angle mounting and served as AA guns for early Japanese heavy cruisers (ie. Furutaka-class to Takao-class. Both classes had their AA guns exchanged for 12.7cm twin afterwards, but Chokai alone was equipped with 12cm singles throughout her career).
Note
Buildable