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GFCS Mk.37

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No.307 GFCS Mk.37
Radar.png Small Radar (Air Radar)
Effects: Firepower+2 AA+7 Armor+1 Accuracy+9 Evasion+2 LoS+6 RangeMedium
Scrap value: Steel 20 Bauxite 24 (Unbuildable)

Equipment Card GFCS Mk.37.png

Equipment Character GFCS Mk.37.png

Equipment Item GFCS Mk.37.png

Equipment Full GFCS Mk.37.png

Refittable Ship Types
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 gun-firing control system developed and deployed in the US.
It has a mechanical computer and possibilities of gun-firing control with a radar, and it was widely deployed not only small warships like destroyers, but also large warships like battleships and cruisers.
Its retrofuturistic and unique look is also its charm.


RADAR Radars are used to provide boosts to LoS Line of Sight and accuracy Accuracy. They are additionally used for:

"Dual Purpose Radars" are radars that are both Surface Radars and Air Radars.
Surface RADARSurfaceSurface Radars are radars that:

Air RADARAir Air Radars are radars that:

  • Must have 2 or more AA Anti-Air,
  • Increase the Anti-Air of the fleet,
  • Are required to trigger most AACI.
  • Is required for AACI n° 36 & 40.


How To Obtain

From quest: B185 (choice)

From limited-time quest: SB32 (choice), 2404 B4 (★+3, choice)

Ranking reward for:

  • Aug 2018: 1-5, 6-20, 21-100

Event reward for:

Choice from 2021 Xmas present (★+2)


Used to improve: 5inch Single Gun Mount Mk.30 Kai5inch Single Gun Mount Mk.30 Kai

Updates History

  • 2018-09-28: Implemented as ranking reward

Fit Bonuses

GFCS Mk.37 Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
United States Navy Vessels - +1 +1 +1

Additional synergy with: 5inch Twin Gun Mount (Secondary Armament) Concentrated Deployment5inch Twin Gun Mount (Secondary Armament) Concentrated Deployment, 14inch/45 Twin Gun Mount14inch/45 Twin Gun Mount, 14inch/45 Triple Gun Mount14inch/45 Triple Gun Mount

Air Radar Type Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
Shigure Kai SanShigure Kai San
Amatsukaze Kai NiAmatsukaze Kai Ni
Akigumo Kai NiAkigumo Kai Ni
Okinami Kai NiOkinami Kai Ni
- +1 +2 +3 One-time[1]
Kiyoshimo Kai Ni /DKiyoshimo Kai Ni
Kiyoshimo Kai Ni D
- +2 +1 One-time[1]
  1. 1.0 1.1 Shared with all RADARAir Radars


Improvement Improved effects
Small RADARSmall 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
[math]\displaystyle{ \text{AdjAA}_\text{fleet} }[/math] 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.25 1.76 2.16 2.50 2.79 3.06 3.30 3.53 3.75 3.95
Accuracy Day 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Night 1.60 2.26 2.77 3.20 3.58 3.92 4.23 4.53 4.80 5.06

See Also