is one way to satisfy the regulation. NOTAMs Because information in the CFS may be out of date, particularly with regard to such issues as runway closures and fuel availability, pilots should check NOTAMs before each flight. NOTAM information in Canada can be obtained from the Nav Canada Collaborative Flight Planning Services (CFPS) or by contacting the appropriate regional Nav Canada Flight Information Centre. Other similar publications While Nav Canada's CFS has the monopoly on paper-version airport directories in Canada, there are several competing internet publications, including the Canadian Owners and Pilots Association's Places to Fly user-editable airport directory. Nav Canada also publishes the Water Aerodrome Supplement (WAS) (French: Canada Supplément hydroaérodromes), as a single volume in English and French. This contains information on all Canadian water aerodromes as shown on visual flight rules (VFR) charts and other information such as navaids. The WAS is published on an annual basis. See also Airport/Facility Directory – U.S. publications roughly equivalent to the Aerodrome/Facility and Planning chapters of the CFS, but divided into several volumes covering different regions. References External links Aviation in Canada