Icebreakers of Russia
There is a disagreement as to whether the Russia first "true" icebreaker was Pilot (manufactured in Great Britain in 1862, whose ice-breaking capabilities were enhanced in Russia in 1864) or genuinely first 1898 Arctic ice-faring icebreaker Yermak. == Classification == In Russia, icebreakers are classified in several ways, according to different criteria: By purpose Leader icebreakers: The most powerful icebreakers that head ship caravans Line icebreakers: For guiding and towing of ships on sea routes, for freeing ice-stuck ships Auxiliary icebreakers: for work in ports, river mouths, and for emergency rescue operations By ice passability: heavy icebreakers can break through ice up to 2 m thick medium icebreakers, for ice from 1 to 1.5 m thick light icebreakers, for ice less than 1 m thick By power type: Steam engine; obsolete, unused Diesel-electric engine; the most common type Nuclear-powered icebreakers By operating method Ice-cutting.