http://www.ccg-gcc.gc.ca/folios/00913/docs/ice-navigation-dans-les-galces-eng.pdf The Canadian Coast Guard recently posted an updated version of its publication Ice Navigation in Canadian Waters. This 165-page document addresses: icebreaking and shipping support services; regulations and guidelines; ice climatology and environmental conditions; navigation in ice-covered waters; and ship design and construction for ice operations. (August 2012).