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8inch Triple Gun Mount Mk.9 mod.2

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No.357 8inch三連装砲 Mk.9 mod.2
RedGunMedium.png Medium Caliber Main Gun
Effects: Firepower+12 AA+2 Accuracy+1 Evasion-1 RangeMedium
Scrap value: Fuel 1 Ammo 6 Steel 1 Bauxite 2 (Unbuildable)

Equipment Card 8inch Triple Gun Mount Mk.9 mod.2.png

Equipment Character 8inch Triple Gun Mount Mk.9 mod.2.png

Equipment Item 8inch Triple Gun Mount Mk.9 mod.2.png

Equipment Full 8inch Triple Gun Mount Mk.9 mod.2.png

Refittable Class
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



This is a late model upgrade of the gun developed by the USN for their treaty heavy cruisers that was mounted on them in triple mounts. It possesses great firepower even though it is just a basic mounting of three 20cm guns in a single turret. This refined and upgraded model was used as the main gun of the USN's Northampton-class treaty heavy cruisers.


Main GunsSmall Caliber Main GunSmall Caliber Main GunLarge Caliber Main Gun are the main armement used by surface ships. Their main stats are the "firepower" Firepower and "accuracy" Accuracy. They are notably required to trigger all Artillery Spotting attacks as well as some Night Cut-Ins, notably the "Double Attack" (DA).


How To Obtain

Upgradeable from: 8inch Triple Gun Mount Mk.98inch Triple Gun Mount Mk.9

Ranking reward for:

  • Sep 2019: 1-5 (★+4), 6-20 (★+4), 21-100 (★+2), 101-500 (★+1)
  • Jan 2020: 1-5 (★+4), 6-20 (★+4), 21-100 (★+2)

Event reward for:

Updates History

  • 2019-10-30: Implemented as ranking reward
  • 2020-01-14: Became improvable

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
HoustonHouston +2


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 Caliber Main Gun 8inch Triple Gun Mount Mk.9 mod.2 0 30 160 190 20 6/7 3/4 2xRedGunMedium.png Houston
6 9/15 5/8 1xRedGunMedium.png
10 - - -
Improvement Improved effects
Medium Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16

See Also