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Type 21 Air Radar Kai Ni

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No.410 21号対空電探改二
Radar.png Large Radar (Air Radar)
Effects: AA+7 Accuracy+4 Evasion+4 LoS+7
Scrap value: Steel 21 Bauxite 22 (Unbuildable)

Equipment Card Type 21 Air Radar Kai Ni.png

Equipment Character Type 21 Air Radar Kai Ni.png

Equipment Item Type 21 Air Radar Kai Ni.png

Equipment Full Type 21 Air Radar Kai Ni.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



An improved version of an early ship-borne radar.
Although it was designed for anti-air, it can also be used as a surface radar.
Though the smaller and easier to handle Type 13 RADAR was more widely used amongst small ships, the Type 21 RADAR was installed on the aviation cruiser Mogami and the Akizuki-class.
This is a what-if upgrade of that RADAR.


How To Obtain

Upgradeable from: Type 21 Air RadarType 21 Air Radar

From quest: G11

Updates History

  • 2021-03-30: Implemented

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Mogami Kai/Ni/TokuMogami Kai
Mogami Kai Ni
Mogami Kai Ni Toku

+1 +5 +2 +1 +4 Non-stackable between itself and Type 21 Air Radar


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
RADAR Type 21 Air Radar Kai Ni 0 -
Improvement Improved effects
Large RADARLarge 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Anti-Air Fleet 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Line of Sight 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42
Accuracy 1.70 2.40 2.94 3.40 3.80 4.16 4.50 4.81 5.10 5.38

See Also