Icebreaker
An icebreaker is a specialized vessel designed for navigating ships through ice, creating channels, clearing ice from waterways, breaking up ice, towing, and performing rescue operations in icy conditions
Source: "R.035-2010. Rules for the Inspection of Vessels in Operation. Guide"
(approved by Order of the Russian River Register dated July 2, 2010 No. 38-p)
(together with "Instructions for Determining the Technical Condition of Hulls in Operation Using Calculation Method", "Methodological Guidelines for Determining the Technical Condition of Metallic Hulls", "Methodological Guidelines for Determining the Technical Condition of Mechanisms", "Methodological Guidelines for Determining the Technical Condition of Electrical Equipment"