I have been told that Ice Breakers make for uncomfortable ocean voyages because of the design compromises need to break ice. They don't so much smash ice with

I have been told that Ice Breakers make for uncomfortable ocean voyages because of the design compromises need to break ice. They don't so much smash ice with the bow of the vessel but instead use their powerful engines to push the ship onto the ice, which then breaks under the weight of the ship. This means they require a relatively flat bottomed hull, which doesn't make for a nice ride in blue water with swell. Newer designs travel through the ice in reverse so that more suitable bows for oceans voyages can be used. https://en.wikipedia.org/wiki/Double_acting_ship https://en.wikipedia.org/wiki/Double_acting_ship