These ships surpassed the NAGATO_CLASS. One, the SHINANO, was converted to a carrier.
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Shinano Class Carrier
SHINANO_CLASS
SHINANO
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The only ship in its class, the Shinano was a converted YAMATO class. It was sunk by a US sub.
Related Topic:
CARRIER_CONVERSIONS
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Nagato Class Battleship
NAGATO_CLASS
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42,800 tons
16" guns
They were pretty good, but older than the YAMATO_CLASS.
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Carrier Conversions
CARRIER_CONVERSIONS
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During the war, the Japanese converted three battleships to carriers. The most thorough conversion was the SHINANO; Hyuga and Ise had their rear turrets replaced with flight decks.