Changes

''A dual-purpose gun developed and deployed by the United States combined with a fire-control RADAR that is capable of surface and anti-air combat. It is a powerful anti-aircraft weapon.<br>This equipment is a concentrated deployment of the twin-mounted 5" guns that adopted a new type of ammunition to improve fire rate.<br>Combining it with a fire-control radar has further increased its fleet air defense capabilities.<br>It was equipped on the Atlanta-class cruisers and was used in the opening brawl of the Naval Battle of Guadalcanal.

''A dual-purpose gun developed and deployed by the United States combined with a fire-control RADAR that is capable of surface and anti-air combat. It is a powerful anti-aircraft weapon.<br>This equipment is a concentrated deployment of the twin-mounted 5" guns that adopted a new type of ammunition to improve fire rate.<br>Combining it with a fire-control radar has further increased its fleet air defense capabilities.<br>It was equipped on the Atlanta-class cruisers and was used in the opening brawl of the Naval Battle of Guadalcanal.

==Notes==

==Mechanics==

* Is essential for [[AACI]] n° 40, 41.

* Is essential for [[AACI]] n° 40, 41.

* Is required for [[AACI]] n° 38, 39.

* Is required for [[AACI]] n° 38, 39.

===How To Obtain===

===How To Obtain===

''Ranking reward for:''

''Ranking reward for:''