It's a coastal icebreaker. Heavy-weather seakeeping is not so critical as it would be in a blue-water navy ship that does not necessarily have the option to heave to and keep steerage when the going gets foul.
OK, thanks for clearing that up.
So all that DTIC study was saying, in essence, is that you shouldn't try grafting brown-water bows on blue-water ships, icebreaking or not...
Apparently that needed spending computer modelling time on