Aviation Art Poster "Aichi M6A Seiran"
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Aviation Art Poster "Aichi M6A Seiran" The Aichi M6A Seiran (晴嵐"Clear Sky Storm" ) was a submarine-launched attack floatplane designed for the Imperial Japanese Navy during World War II. It was intended to operate from I-400 class submarines whose original mission was to conduct aerial attacks against the United States.