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Appendices 
Jacket Structure 
Support structure that is made out of a three-dimensional truss construction and which fea 
tures three or more corner piles. The foundation piles are driven through sleeves that are ar 
ranged at the lower corners. Alternatively, suction bucket foundations can be arranged at the 
corner piles. The foundation piles can also be driven into place before the jacket structure is 
erected. 
Maintenance 
Measures to delay the degradation of the existing wear margin of the respective unit during 
operation. In general, maintenance is carried out regularly according to technical rules or ac 
cording to the manufacturer’s instructions - often by trained and qualified staff. 
Manned Offshore Substation 
An offshore substation is considered as being manned, if overnight stays are planned. 
Monitoring Report 
The appointed inspector describes and evaluates the results of the tests (for example periodic 
inspections or tests during the decommissioning phase) in a monitoring report in a compre 
hensible and plausible way. 
Monopile 
Large pipe that is driven or drilled into the soil. It acts as both the foundation element and sub 
structure (resp. possibly only part of the substructure) of the offshore structure. 
Nominal Values (Design Values) of the Soil Parameters 
Values derived from the characteristic values of soil parameters, reduced (or, if necessary, in 
creased) by the partial safety factor. The use of nominal values is necessary for calculations 
where the partial safety factor is not or not exclusively applied to ground stress (calculated 
using the characteristic values of the soil parameters). These are to be fixed in consideration 
of the geotechnical engineering model in which they are to be used. 
Non-Damage-Tolerant Components 
Components that are not capable of withstanding the expected load resulting from damage 
are called non-damage-tolerant components. 
Normal Operation 
During normal operation, operation conditions remain within the normal operating parame 
ters. Normal operation also encompasses the operation conditions during a shutdown, main 
tenance, preservation and repair work. 
The electrical connection to the onshore grid is serviceable, energy can be transmitted in both 
directions and the power requirements of the offshore substation can be covered by the 
onshore grid. The substation is able to handle failures of single components according to the 
agreement. 
Offshore Station 
An offshore station or an offshore platform is an offshore structure (offshore installation). It is 
an artificial floor space in the sea which includes all the necessary infrastructural components 
and safety equipment that guarantees a safe workplace and a safe stay and also protects the 
environment at all times and under all weather conditions. Different design options are availa 
ble, depending on the use and the size of the station and the geological conditions at the 
future site.