HSTK L Admiralty (Offshore Installations)

Name of oilfield or gasfield

Platform with designation/name

Limit of safety zone around offshore installation

Limit of development area / Limit of routeing measure

Wind turbine, floating wind turbine and wind turbine with vertical clearance

Offshore wind farm

Offshore wind farm (floating)

Wave farm, Renewable energy device

Production platform, Platform, Oil derrick

Flare stack (at sea)

Fixed Single Point Mooring, including Single Anchor Leg Mooring (SALM), Articulated Loading Column (ALC)

Disused platform, with superstructure removed

Floating Single Point Mooring, including Catenary Anchor Leg Mooring (CALM), Single Buoy Mooring (SBM)

Moored vessel associated with offshore production

Mooring ground tackle for fixing floating structures

Production well, with depth where known

Suspended well (wellhead and pipes projecting from the seabed) over which the depth is unknown

Suspended well over which the depth is known

Above-water wellhead (lit and unlit).

The drying height or height above height datum is charted if known

Underwater turbine

Subsurface Ocean (or oceanographic) Data Acquisition System (ODAS)

Submarine cable

Submarine cable area

Submarine power cable

Submarine power cable area

Disused submarine cable

Supply pipeline : unspecified, oil, gas, chemicals, water

Supply pipeline area : unspecified, oil, gas, chemicals, water

Outfall and intake : unspecified, water, sewer, outfall, intake

Outfall and intake area : unspecified, water, sewer, outfall, intake

Buried pipeline / pipe (with nominal depth to which buried)

Pipeline tunnel

Diffuser, crib (nature of obstruction may be stated)

Disused pipeline / pipe