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1. When a grounded or sunken vessel, a grounded assembly of floating material or an object lost by a vessel or assembly of floating material causes or threatens to cause total or partial obstruction of the fairway, the boatmaster of the vessel or assembly of floating material shall endeavour to get the fairway cleared as soon as possible.

2. A boatmaster whose vessel or assembly of floating material is in danger of sinking or becomes impossible to control is under the same obligation.