The winter navigation system in the Northern Baltic Sea is globally one of the largest regional arrangements to ensure year-round maritime transports in a sea area challenged by ice every year. Thousands of assistance operations, including hundreds of tows, are dependent on the regions’ relatively small amount of icebreakers’ capability to perform assistances in a safe and efficient manner. For the winter navigation system to work efficiently, high assistance speeds are necessary to release icebreakers from their previous assistance task to their next one.

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