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8inch Triple Gun Mount Mk.9

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8inch Triple Gun Mount Mk.9

No.356 8inch三連装砲 Mk.9

Medium Main Gun Medium Caliber Main Gun

Effects: Firepower+11 Evasion-1 Anti-Air+1 Range Medium

Scrap Value: Ammunition6 Steel9

Equipment Card 8inch Triple Gun Mount Mk.9.png

Equipment Character 8inch Triple Gun Mount Mk.9.png

Equipment Item 8inch Triple Gun Mount Mk.9.png

Equipment Full 8inch Triple Gun Mount Mk.9.png

Refittable Class
Coastal Defense ShipDestroyer
Light CruiserTorpedo Cruiser
Heavy CruiserAviation Cruiser
BattleshipAviation Battleship
Fast BattleshipLight Carrier
Standard CarrierArmored Carrier
Seaplane TenderSubmarine Tender
SubmarineSubmarine Carrier
Repair ShipTraining Cruiser
Fleet OilerAmphibious 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.


How To Obtain

Stock equipment of Houston KaiHouston Kai, HoustonHouston, Northampton KaiNorthampton Kai, NorthamptonNorthampton

Event reward for:

Ranking reward for:

  • Aug 2019: 1-5 (★+3, x2), 6-20 (★+3, x2), 21-100 (★+3, x2), 101-500

Updates History

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note

Akashi's Improvement Arsenal

Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Medium Main Gun 8inch Triple Gun Mount Mk.9 0 20 120 160 10 5/6 2/3 1xRedGunMedium.png Houston Upgrades to 8inch Triple Gun Mount Mk.9 mod.2.
6 6/9 3/5 2xRedGunMedium.png
10 12/30 7/12 1xRedGunMedium.png
1xItem Icon New Model Gun Mount Improvement Material.png

See Also