Interpretation
2. In these Regulations–
“associated installation” means, in relation to a riser or valve, the offshore installation served by it;
“controlled waters” means controlled waters within the meaning of section 1(4) of the 1971 Act;
“emergency shut-down system” means the system comprising mechanical, electrical, electronic, pneumatic, hydraulic or other arrangements by which the plant and equipment on an offshore installation are automatically shut down in the event of an emergency;
“emergency shut-down valve” means a valve fitted for the purposes of regulation 5 below;
“fixed installation” means an offshore installation which is not a floating installation;
“floating installation” means an offshore installation which is supported by its buoyancy in the water;
“installation manager” means the manager of an associated installation;
“manager” includes, where no manager of an associated installation is appointed pursuant to section 4 of the 1971 Act, any person made responsible by the owner for safety, health and welfare on the installation;
“offshore installation” means any offshore installation for the purposes of the 1971 Act which is maintained in controlled waters for the carrying on of any activity to which the 1971 Act applies other than an offshore installation which is–
entirely below sea-level at all states of the tide;
used exclusively for flaring; or
not normally manned and used exclusively for the loading of substances into vessels or for their reception and storage prior to such loading;
“owner”, in relation to a pipe-line in respect of which no person has been designated as its owner in pursuance of section 33(3) of the 1975 Act, means the person in whom the pipe-line is vested;
“pipe-line” means a pipe or system of pipes which is connected by means of a riser to an offshore installation and which is used for the purpose of conveying any substance which is flammable or toxic not being a pipe-line with a nominal internal diameter of less than 40 millimetres;
“quick-disconnect fittings” means fittings on a riser serving a floating installation which are designed to allow the flexible part of the riser to be disconnected quickly from the installation;
“riser” means that section of a pipe-line which connects an offshore installation to a section of the pipe-line which lies in, or in close proximity to, the sea-bed and extends outwards from the installation.