Russia’s sideways sailing Baltika icebreaker undergoes final tests
http://voiceofrussia.com/news/2014_02_03/Russia-s-sideways-sailing-Baltika-icebreaker-undergoes-final-tests-3597/

>The icebreaker, only 20 meters wide, can make a 50-meter wide passage in the ice, enough for a big tanker,
> thanks to its capacity of operating with up to a 30° sideway angle.

幅は20mだが、50m幅の航路を作れる砕氷船を新造とか、ロシア。