Does increased damage against "installation type" bosses [[Airfield Princess]], [[Isolated Island Demon]], [[Northern Princess]], and [[Midway Princess]]. All of these bosses were based on real-life airfields, which the type 3 shell was designed to destroy. This bonus seemed to be calculated by firepower*2.5.
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Does increased damage against "installation type" bosses [[Airfield Princess]], [[Isolated Island Demon]], [[Northern Princess]], and [[Midway Princess]]. All of these bosses were based on real-life airfields, which the type 3 shell was designed to destroy. With type 3 equipped, firepower * 2.5 is used for pre-cap damage calculations during night battle instead of firepower + torpedo.