https://akerarctic.fi/en/arctic-passion/world-icebreakers-overview/

Finland leads the world Following World War II, Finnish companies made rapid advancements in icebreaking technology, pushing the state of the art in icebreaking design, construction, power supply, and propulsion systems. Today, Finland is a global leader in icebreaker design and construction, with most of the world’s icebreakers originating from Finnish expertise. Naturally, every single icebreaker in service in Finland has been designed and constructed locally.

Doesn’t really fully answer the question, but yeah basically we have a lot of ice and shipping routes on the coastlines both west and south