Akizuki/AACI

Akizuki-class Anti-Air Cut-In (AACI) Information

 * Akizuki-class ships have the following exclusive AACI types:
 * Two HA mounts + Radar: type 1, +7 fixed bonus per slot. This is the second strongest AACI in the game.
 * HA mount + Radar: type 2, +6 bonus. The third strongest AACI, can be used together with Night Battle equipment, such as Searchlight.
 * Two HA mounts: type 3, +4 bonus.
 * All those types, however, have the lowest priority.
 * When there are multiple ships with AACI in your fleet, for each of those ships the game checks whether it triggers AACI until one of them does. However, the order in which they are checked depends on the AACI type (i.e., priority = type). Akizuki-class exclusive AACI have the lowest priority, so for it to even have a chance to trigger, all other ships' AACI have to fail. Therefore, having another AACI ship in your fleet can be counter productive if its AACI is weaker (e.g. non-Akizuki-class DD), as it will lower the chance of Akizuki-class DD's stronger AACI from happening. The only ship that has stronger AACI is Maya Kai Ni (+8 bonus), she or another Akizuki-class DD can be freely used as a second AACI ship in the fleet (another option is a BB exclusive +6 bonus setup).
 * The AACI trigger rate depends on ship's AA value, that is, in theory, Akizuki Kai (116 AA) will perform AACI more often than Teruzuki Kai (114 AA), while Teruzuki will perform it more often than Hatsuzuki Kai (110 AA). However, the difference is thought to be small (one up to few %).
 * Akizuki-class exclusive AACI are the only AACI types that can use both Surface and Air Radars (Air Radars are preferred due to their additional AA value). Non-Akizuki-class DD can use Akizuki guns and a Surface Radar without risking to override Akizuki-class AACI.