Icebreaker - Wikipedia

Shipping Traffic on Northern Sea Route Grows by 30 Percent

Ural (icebreaker) - Wikipedia

HMS Endurance (A171) - Wikipedia

Viktor Chernomyrdin (icebreaker) - Wikipedia

Moskva (2007 icebreaker) - Wikipedia

File:Icebreaker Nathaniel B Palmer.jpg - Wikipedia

Polar-class icebreaker - Wikipedia

Malygin (1912 icebreaker) - Wikipedia

Sampo (1960 icebreaker) - Wikipedia

Vladimir Ignatyuk (icebreaker) - Wikipedia