jääkerroin

Jääkerroin, often translated as "ice factor" or "ice coefficient," is a term used in certain contexts, particularly in some Nordic countries, to describe a rating or classification related to the ability of a ship or vessel to navigate through ice-covered waters. It is not a universally standardized term in international maritime law, but rather a system developed by specific classification societies or authorities to assess and communicate a vessel's ice-strengthening capabilities.

The concept of an ice factor typically involves a numerical or descriptive scale that indicates the thickness and type of ice a vessel is designed to withstand. Higher ice factor ratings generally correspond to greater structural reinforcement and propulsion power, allowing the vessel to operate more independently in challenging ice conditions. These factors are crucial for vessels operating in regions like the Baltic Sea, the Arctic, or other areas prone to seasonal or permanent ice formation.

Different maritime administrations or organizations might have their own specific ice classification systems, which can lead to variations in the nomenclature and the precise criteria used. However, the underlying principle remains the same: to provide a clear indication of a vessel's suitability for ice navigation and to ensure the safety of operations in frozen seas. This classification influences operational decisions, route planning, and insurance considerations for vessels operating in ice-prone areas.