What is the speed limit in a harbour or marina?

In a harbour or marina, the speed limit is generally set at 6 knots with a "No Wash" requirement. This speed limit is designed to enhance safety for all users of the area, including other boats, swimmers, and those engaged in activities on the shore. A "No Wash" rule indicates that boat operators must ensure their vessel does not create a wash, which can cause dangerous conditions for smaller boats, reduce visibility, and damage the marina infrastructure or the environment.

This regulation is crucial in areas where the traffic is high and where many vessels are maneuvering in close quarters. Keeping the speed at 6 knots allows for better control and increases reaction time in case of any unforeseen hazards. It is particularly important in these busy and confined areas to minimize risks associated with wakes and the resultant wash that could disturb other vessels or beachgoers.

The other options represent various speeds that may apply in different contexts, but within the specific setting of harbours and marinas, the 6 knots with a "No Wash" stipulation is the standard to follow for safe navigation.