Type 21 Air Radar

[Edit] Type 21 Air Radar No.30 21号対空電探
Large Radar (Air Radar) Effects: +4 +2 +4 Scrap value: 20 20 (Buildable)
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

Introduction

初の実用艦載電探です。
対空用ですが、対水上電探としても使用可能です。
13号電探と混載することも可能で、基本的にこの21号は大型艦に搭載されました。

The Type 22 radar was one of the first radars to be used aboard warships.
Primarily tasked for air search, it can also be used for surface search.
While this can be used in conjunction with the Type 13, the Type 21 is basically used aboard larger warships.

Mechanics

Radars are used to provide boosts to LoS and accuracy . They are additionally used for:

• Certain Artillery Spotting,
• Certain Night Cut-Ins,
• Maelstrom resource loss mitigation,

Air Air Radars are radars that:

• Must have 2 or more AA ,
• Increase the Anti-Air of the fleet,
• Are required to trigger most AACI.

Notes

How To Obtain

Buildable

Stock equipment of: Abukuma Kai, Chikuma Kai Ni, Hiei Kai Ni, Isuzu Kai Ni, Isuzu Kai, Junyou Kai Ni, Kinu Kai, Kirishima Kai Ni, Kitakami Kai Ni, Kongou Kai Ni, Maya Kai, Mikuma Kai, Naka Kai Ni, Ooi Kai Ni, Suzuya Kai, Tone Kai Ni, Yahagi Kai

From quest: C56 (choice), C66 (x2, choice)

Uses

Used to improve: Type 13 Air Radar, Type 21 Air Radar, Type 42 Air Radar, Type 21 Air Radar Kai, SK Radar, Type 21 Air Radar Kai Ni, 15m Duplex Rangefinder + Type 21 Radar Kai Ni

Updates History

• 2013-04-23: Implemented with initial game release
• 2015-06-12: Became improvable and upgradeable to Type 21 Air Radar Kai
• 2021-03-30: Became upgradeable to Type 21 Air Radar Kai Ni, build rate with Akizuki-class increased, visible bonuses added

Fit Bonuses

Ship	Extra Requirement								Note
Mogami Kai/Ni/Toku Akizuki-class				+3		+2		+2	Non-stackable between itself and Type 21 Air Radar Kai Ni

Improvement

Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	Type 21 Air Radar	0	10	0	40	50	5/6	2/3	-	I   I2	I I1 I2	X	H H1	H H1	I   I2 H	I   I2 H	Ise Ise Kai Ise Kai Ni Hyuuga Hyuuga Kai	Hyuuga Kai Ni can NOT improve this equipment. Upgrades to Type 21 Air Radar Kai.
		6					6/8	3/5	1x
		10					12/16	5/13	2x
		0					{{{Fuel:2}}}	{{{Ammo:2}}}	{{{Steel:2}}}	{{{Baux:2}}}	5/6	2/3	-	X	M MT	M	M	M MT	X	X	Mogami Mogami Kai Ni Toku	Mogami Kai Ni can NOT improve this equipment. Upgrades to Type 21 Air Radar Kai Ni.
		6									6/8	3/5	1x
		10									20/28	7/15	1x 1x

Improvement effects
Large	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
	1.40	1.97	2.42	2.80	3.13	3.42	3.70	3.95	4.20	4.42
Day	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
Night	1.30	1.84	2.25	2.60	2.91	3.18	3.44	3.68	3.90	4.11

See Also

二式二号電波探信儀一型