Paragraph 7 Swimming
No person shall swim on the surface or underwater within—
(a)
100 metres of the walls, slipways or boundaries of Her Majesty’s Dockyards or other Crown Establishments;
(b)
150 metres of any of Her Majesty’s vessels;
(c)
any area where anchorage is prohibited under regulation 22,
save with the permission of the Queen’s Harbour Master.