1. Underwater diving shall be prohibited, without a special permission, in areas where navigation might be hindered, particularly:
(a) On the normal course of vessels showing the marking referred to in article 3.16;
(b) At entrances to and in harbours;
(c) Near and on berthing areas;
(d) In areas reserved for water skiing or similar activities;
(e) On fairways;
(f) In ports.
2. All vessels shall keep at a sufficient distance from a vessel showing the marking referred to in article 3.36.