意外と難しいんだね...引用・参考資料等 https://www.quora.com/Why-did-the-Royal-Navy-prefer-open-air-bridges-on-their-ships-during-the-Second-World-Warhttps://www.quora.com/Why-did-destroyers-have-open-bridges
http://www.nicovideo.jp/watch/sm44009176
