Navigational Warnings and Notices
Current navigational warnings (NAVWARNs), including notices to shipping, notices to mariners (NOTMAR), shoals and status of aids to navigation.
National services and information
NAVWARNs contain information about changes to navigational aids and current marine activities or hazards. Visit Navigational warnings for more information.
Provides the necessary information to update charts and nautical publications.
Provides warnings and notices for geographical sea regions known as NAVAREAs, including NAVAREA XII.
Regional services and information
Forecasts of available water depths for vessels navigating the Fraser River South Arm Channel
St. Lawrence River, St. Mary's River, St. Clair River and Detroit River.
Seaway Notices address issues specific to a given navigation season, and serve to complement the regulations found in the Seaway Handbook.
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