Arctic patrol ships and the case for a heavier gun

Should Canada's Arctic offshore patrol vessels carry heavier guns?

A 57 mm gun would add useful deterrence and limited air defence without imposing a serious weight penalty, but heavier combat systems could undermine the economical patrol-ship role.

The ship's long-range patrol qualities are strong, but its 25 mm gun is lighter than the hull can reasonably support. A 57 mm weapon could add visible and practical deterrent value when Arctic patrols bring Canadian ships near Russian forces. Weapon additions can also drive larger crews and broader mission requirements, quickly turning an economical offshore patrol vessel into an expensive frigate.