Guide

Obstruction in navigable water: report it to Transport Canada

Avoid the obstruction, record its location and notify the Navigation Protection Program of a hazard or interfering work.

Navigation hazard

Slow down, keep watch and do not try to move a cable, tree, wreck or structure. For immediate distress, alert the Coast Guard or 911.

Describe the obstruction

Record its nature, apparent size, position, channel, current, tide and visibility. Distinguish a temporary obstacle from an installed dock or work.

Collect identifiers

Record the water body, municipality, coordinates, date, time and photos taken without a risky manoeuvre. State whether a vessel had to divert.

Notify the federal program

Transport Canada asks for prompt notice to the regional Navigation Protection Program office. If you are responsible for the obstruction, follow its specific duties.

Maintain caution

A report does not guarantee immediate removal. Check navigational warnings and do not place an unauthorized buoy or light yourself.

Report an obstruction to navigation — Transport Canada

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Official sources are linked in the guide. Checked August 29, 2026; confirm current rules, forms and deadlines with the responsible authority.
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