BOAT CHANNEL - PORTSMOUTH HARBOUR ENTRANCE

A Boat Channel between 4 Bar buoy (50°46'·98N 1°06'·49W) and Ballast beacon (50°47'·62N 1°06'·83W), is established on the west side of the entrance. It is mandatory for all vessels under 20m in length when entering or leaving Portsmouth Harbour. All sailing vessels fitted with engines must proceed under power when in this channel. Vessels under 20m in length proceeding to and from Gunwharf Quays or the town cambers must cross the main navigation channel at right angles northward of Ballast beacon after first obtaining the permission of the King's Harbour Master. For further details see Admiralty Sailing Directions, Admiralty List of Radio Signals and local Notice to Mariners.