Report an obstruction in a navigable waterway in Canada

Keep clear of the hazard, mark its location as accurately as possible and notify the authority responsible for navigation safety.

A submerged object, floating debris, wreck or damaged structure can create a navigation hazard. Do not approach, move or attempt to mark the obstruction yourself if doing so could put you or others at risk.

What to include in a report

1. Give the waterbody, nearest community or landmark, and coordinates if you can obtain them safely.
2. Describe the object, approximate size, whether it is floating or submerged and any visible movement.
3. State when you observed it and whether it affects a channel, landing, bridge or marked route.
4. Share photographs only if they can be taken from a safe position without approaching the hazard.
5. Report immediate danger to the Coast Guard or emergency services; use Transport Canada’s Navigation Protection Program for questions about works or obstructions affecting navigation.
6. Keep the reference number and update the authority if the hazard moves or is removed.

Water levels, current and visibility can change quickly. Do not rely on a map or old report as confirmation that a route is safe; follow marine notices and local navigation advice.

Transport Canada: Navigation Protection Program · Canadian Coast Guard: report a marine incident or hazard

Sources and limits

Sources: Transport Canada Navigation Protection Program and Canadian Coast Guard incident information. A report does not replace navigation warnings or a mariner’s own assessment of current conditions.

General information based on federal and national rules; provincial rules may differ. Confirm with the official body before acting.