The Dockyard Port of Portsmouth consists of 55 Square Miles covering the eastern Solent from a line between East Cowes and Hill Head.
A 10 knot speed limit applies to all craft including PWCs within the harbour and within 0.5 nautical miles of the shore throughout the Dockyard Port, except when operating within areas designated for PWC use which are detailed further down this page. All PWC users should familiarise themselves with General Direction 7/23.