A safety zone is established around each installation specified in column 1 of the table in the Schedule (being an installation to be stationed in waters to which subsection (7) of section 21 of the Petroleum Act 1987 applies) having a radius of five hundred metres, as respects that installation, from the point which has the co-ordinates of latitude and longitude according to the World Geodetic System 19843 specified in columns 2 and 3 of the table in the Schedule.