1. Vessels may sail abreast only if there is enough room to do so without inconvenience or danger to navigation.
2. Except when overtaking or passing, it is prohibited to sail within 50 m of a vessel, side-by-side formation or pushed convoy showing the marking referred to in article 3.14, paragraphs 2 or 3.
3. Without prejudice to the provisions of article 1.20, it is prohibited to go alongside a vessel or an assembly of floating material under way, to grapple it or to ride along in its wake, without the express permission of its boatmaster.
4. Water skiers and persons practising aquatic sports without the use of a vessel shall keep at a sufficient distance from vessels and assemblies of floating material under way and from floating equipment at work.