I'll ask Pat to speak to the specifics of the ships, but as a former commissioner of the Coast Guard, I'm happy to answer. The AOPS vessels are not icebreakers, they're ice capable. An icebreaker has a different design in terms of its stern and the bow specifically, to allow it to manoeuvre around vessels and cut a track in ice. These vessels will be able to operate in significant ice, up to a metre thick, and they'll be able to operate in the Arctic. They would be able to ice break in an emergency, but as a routine function, that's not what they're designed to do.
On March 20th, 2018. See this statement in context.