8inch Triple Gun Mount Mk.9
|Coastal Defense Ship||Destroyer|
|Light Cruiser||Torpedo Cruiser|
|Heavy Cruiser||Training Cruiser|
|Aviation Cruiser||Fast Battleship|
|Light Carrier||Standard Aircraft Carrier|
|Submarine||Aircraft Carrying Submarine|
|Repair Ship||Amphibious Assault Ship|
Developed by the United States Navy as the main gun of their treaty heavy cruisers, it was equipped on them in a triple mount. It possesses great firepower even though it is just a basic mounting of three 20cm guns in a single turret. It was used as the main gun of the USN's Pensacola and Northampton-class treaty heavy cruisers.
- August 2019 Ranking reward for all tiers (received 2 copies which came improved to ★+3 for ranks 1-20, received 2 copies (one of which came improved to ★+3) for ranks 21-100).
- Fall 2019 Event E-4 Medium/Hard reward (came improved to ★+2 on Medium, ★+4 on Hard).
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