11.—(1) The master of a vessel navigating downstream on the river shall have precedence of passage through the same bridge arch over the masters of vessels navigating upstream.
(2) The master of a vessel navigating along the river shall keep to his or her own starboard side of the river and the masters of vessels navigating in opposite directions shall pass port side to port side.
(3) Notwithstanding any other provisions, the master of any vessel overtaking any other vessel shall keep out of the way of the vessel being overtaken. A vessel shall be deemed to be overtaking when coming up with another vessel from a direction of more than 22.5 degrees abaft the beam. If a vessel is in doubt, it shall assume that it is overtaking.
(4) The master of any vessel crossing from one side of the river to the other side shall do so at a proper time having regard to other vessels navigating up and down the river and shall navigate so as not to cause obstruction or damage to any other vessel.
(5) The master of any vessel that approaches the Lagan Weir which at that time is not ready to be navigated shall hold off a reasonable and safe distance from the weir and may use mooring facilities available upstream and downstream until the weir is ready for passage over.
(6) No master shall launch a vessel on the river except at approved public and private launching locations.