The last word in submarine "aviation" until the inception of cruise missiles, the Aichi M6A1 "Seiran" was Admiral Yamamoto's baby, a submarine launched bomber designed to hit targets in the Americas from the IJN's hugely secret carrier submarines... attacking America from the Atlantic! Originally intended to be a floatplane, the cut-backs in the "Sen Toku" program following Yamamoto's death meant that only two I-400 class submarines were completed. That in turn meant that each submarine had to launch its three bombers together to provide any kind of credible strike force. That made launch time crucial, not only to reduce fuel wastage but also to reduce the risk of discovery. It turns out the aircraft could be handled quicker without floats- but that meant they could only be used once. Of course, the deteriorating war situation soon made a standing order of "disposable" aircraft and pilots. The two I-400s were at sea preparing for a kamikaze strike when the Emperor announced the surrender. Needless to say, the allied crews who accepted the surrender of the huge submarines were probably fairly gob-smacked by the experience! My Seiran and I400 models rendered in Vue 8 Esprit. In this case the floats have been rendered "transparent" for their single-use configuration. Comments always welcome.