bootlegga bootlegga:
Yes, they are capable of year round operations in one metre sea ice - any guess how much of the Arctic has one metre sea ice in January? It's a far cry from the three Heavy Icebreakers (Polar class 7 or better) Harper originally promised. That means that most of the Arctic will be off limits for 4-6 months of the year.
Maybe the government chart is wrong, but according to it, PC1 is the highest rating for an icebreaker, while PC7 is the lowest.
The St. Laurent, and its replacement the... um... Diefenbaker

, are rated Polar Class 1. If we need to get a boat up that far up north, we can always use one of the big CG ships.
$1:
Maybe I'm mistaken on the size then - most OPVs other countries use are a fair bit smaller than the Halifaxes. Even if the AOPVs are bigger, they will pack far less punch than a Halifax does.
They will be OPV's in armament and crew complement, but they will be much heavier than than the frigates and destroyers. Gotta have a thick hull to break ice.
$1:
I stand by my assertion though - the RCN has no desire to patrol the Arctic whatsoever, and that, combined with their lack of heavy ice-breaking capability, will be why they will spend most of the year in the Atlantic or Pacific oceans, not the Arctic as Harper has alluded.
I imagine the lower sections of the archipelago will be accessible for most (if not all) of the year to the AOPV's given how far the sea ice is completely clearing out in the summer. If this trend continues these vessels will be able to operate farther north for longer as time goes on.
Also the Navy had no interest in PC1 class icebreakers, as these ships are not very useful to the Navy outside of the Arctic. The A/OPV's will have utility patrolling the Atlantic and Pacific EEZ's, meaning we don't have to waste more capable frigates and destroyers on that mundane task.