潜水艦「せいりゅう」
<a rel="nofollow" class="external text" href="http://www.mod.go.jp/msdf/index.html">海上自衛隊</a>
CC BY 4.0
<a rel="nofollow" class="external free" href="https://www.mod.go.jp/msdf/equipment/ships/ss/souryu/#509">https://www.mod.go.jp/msdf/equipment/ships/ss/souryu/#509</a>