for people in the water, small dinghies, and trailing ropes. When travelling at 10 knots or more you must stay at least 30m from any moored vessel. Diving activities The diver's flag -- white and blue no less than 400mm x 400mm in size -- must be shown when people are engaged in diving activities from a vessel. It is to be flown in a vertical position above the superstructure. It is recommended that this flag be shown when diving/snorkelling from shore. As divers may not always be in close proximity, it is important that as soon as you see a dive flag you slow down, keep well clear and keep a good lookout. If you are within speaking distance of the dive master, get their instructions as to a safe direction to travel to avoid any possible encounters. If there is no dive master about then it's your responsibility to keep a good lookout at all times for any divers above and below the surface and then determine a safe distance. If you see a snorkeller in the water, remember to remain a safe distance. If you are travelling at a speed of 10 knots or more, keep a minimum of 60 metres from persons in the water. When you see a diver's flag slow down, keep well clear and keep a lookout.