Safely navigating coastal waters, a major lake or river system is often a complex task for both recreational boaters and professional mariners. Setting a course and avoiding natural hazards is much easier with the aid of Hydrographic charts. The nautical charts detail shoreline, water depths, reefs, navigational aids and safe harbours.

The areas covered include The Great Lakes, St. Lawrence Seaway, Ottawa River, Rideau Waterway, Trent-Severn Waterway, Lake of the Woods, Rainy Lake, Winnipeg River System, Lake Winnipeg, Lake Manitoba, Lake Winnipegosis, Great Slave Lake, Great Bear Lake, Mackenzie Delta, Mackenzie River and Lake Athabasca