St. Lawrence River and Gulf - Navigational Warnings and Notices

See all categories

Change data category

Canadian Coast Guard

The Canadian Coast Guard provides the following information concerning navigation hazards and notices.

Navigational Warnings (NAVWARNs)

Shoals in the waterways

St. Lawrence River, St. Mary's River, St. Clair River and Detroit River.

Notices to Mariners (NOTMAR)

The Notices to Mariners (NOTMAR) Web site provides the necessary information to update charts and nautical publications.

Date modified: