River Clyde Fisheries Management Trust Ltd.
 

• Boats under power give way to sail.

• Boats under power approaching head-on should turn to starboard. 

• (Green to green, red to red, perfect safety, go ahead.)

• Boats under power crossing, the vessel with the other on her starboard
  side should keep clear. 
  (If to starboard red appear, 'tis your duty to keep clear.)

• An overtaking vessel must keep clear of the vessel being overtaken.

Traffic Separation Schemes

• Small craft should, whenever possible, use the Inshore Traffic Zones.

• If small craft have to use a traffic lane, they must follow the correct direction
  for the lane and they must not impede larger vessels.

• If it is necessary to cross a traffic lane make sure your heading is at
  right angles to the lane.