4.—(1) Vessels restricted in their ability to manoeuvre and vessels constrained by their draught within the meaning of the Collision Regulations shall not operate in the Dockyard Port without the permission of the Queen’s Harbour Master.
(2) Vessels of 20 metres or more in overall length shall—
(a)enter or leave the Harbour only under the direction of the Queen’s Harbour Master;
(b)obtain permission from the Queen’s Harbour Master to sail or move within the Harbour before leaving their mooring or berth or weighing anchor; and
(c)when inward bound obtain permission from the Queen’s Harbour Master to enter the Harbour before passing the Saddle Buoy or entering the Swashway across Spit Sand.
(3) No vessel shall, without the permission of the Queen’s Harbour Master, navigate—
(a)save as provided for in sub-paragraph (c) below, within 50 metres of any of Her Majesty’s vessels or foreign warships or auxiliaries alongside any Crown Establishment or which is at anchor, a buoy or a mooring within the Dockyard Port;
(b)within 50 metres of the walls, slipways and boundaries of any Crown Establishment; or
(c)within 100 metres of any submarine alongside in any Crown Establishment or which is at anchor, a buoy or a mooring within the Dockyard Port.