Current navigational warnings (NAVWARNs), including notices to shipping, notices to mariners (NOTMAR), shoals and status of aids to navigation.
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.
Enhance the safety, security, and efficiency of U.S. Waterways; enable effective Coast Guard operations, and maximize the utility of GPS for its civil users.
Canadian Coast Guard is responsible for Broadcast Warning Messages in NAVAREA XVI and NAVAREA XVIII.
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.