Paragraph 12 Use of whistle
A whistle shall not be used within the limits of the Dockyard Port except—
(a)
in accordance with the Rules contained in Schedule 2 to this Order;
(b)
as a signal of distress;
(c)
to prevent collision;
(d)
in any condition affecting visibility;
(e)
to test the whistle, provided that permission to do so has first been obtained from the Queen’s Harbour Master.