An icebreaker is a ship specially designed to force its way through ice-covered waters. Whether powered by gas turbines, diesel-electric power, or nuclear energy, icebreakers are expensive to build, very expensive to run, and uncomfortable to travel in on the open sea because they roll easily. Nevertheless, icebreakers are needed to keep trade routes open where there exist seasonal or permanent ice conditions. What three features must a ship possess in order to be considered an icebreaker? Discuss
Source: The Free Dictionary