*Available as reward from the [[Spring 2015 Event]] for clearing E-4.
*Available as reward from the [[Spring 2015 Event]] for clearing E-4.
*Was available between December 8th and 29th, 2015 as a limited time drop at 4-5 Node H, I, and J.
*Was available between December 8th and 29th, 2015 as a limited time drop at 4-5 Node H, I, and J.
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*As of February 24th, 2016, Italia, [[Roma#Upgrade|Roma Kai]], and [[Zara#Upgrade|Zara Kai]] have been given the ability to use seaplane bombers. They will utilize the bombers in the same fashion as aviation battleships and aviation cruisers, but the bombers will not be launched against enemy submarines (i.e. '''no ASW capability''' while equipped by these three ships).
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*As of February 24th, 2016, Italia, [[Roma#Upgrade|Roma Kai]], and [[Zara#Upgrade|Zara Kai]] have been given the ability to use seaplane bombers. They will utilize the bombers in the same fashion as aviation battleships and aviation cruisers, but the bombers will not be launched against enemy submarines (i.e. '''these three ships still have no ASW capability even while equipping seaplane bombers''').