Paragraph 4 Exclusion Zone – Surface Vessels
The Queen’s harbour master, on any occasion when it is necessary to facilitate or ensure a clear passage for any surface vessel, may direct immediately before the vessel becomes underway that there be an exclusion zone of up to 250 metres radius in the water around the vessel.
Notice that a direction under sub – paragraph (1) above has been given shall be broadcast by the Queen’s harbour master on VHF channel 73 from time to time during the period in which the submarine is underway.
The vessel to which the exclusion zone applies shall display—
(by day) two diamond shapes vertically disposed where best seen; or
(by night) two flashing red lights at the masthead horizontally disposed.
Where a direction specified in sub-paragraph (1) above has been given and whilst the shapes or light signals specified in sub-paragraph (2) above are displayed—
no vessel underway in the dockyard port, save any vessel authorised by the Queen’s harbour master to escort the vessel to be given clear passage, shall enter the exclusion zone surrounding that vessel; and
vessels alongside, at anchor, at a buoy or at a mooring within the exclusion zone shall remain in such a position whilst the direction remains in force.
The direction shall remain in force until either—
the vessel which is to be given clear passage leaves the limits of the Dockyard Port; or
the Queen’s Harbour Master rescinds the direction and broadcasts notice of the same on VHF Channel 73.