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Appendices 
Standby Power Supply 
When standby power is being used, standby power units replace the general electric power 
grid (onshore grid connection) in order to ensure the power requirements of the offshore sub 
station are met. Furthermore, if the power units are suitably designed, it may also be possible 
to supply standby power to all the wind turbines. The power units regulate the grid autono 
mously in the “isolated operation” mode. Standby power operation is a normal mode of ope 
ration so that it is not necessary to supply safety-significant devices with emergency power. 
State of Current Scientific and Technical Progress 
The state of current scientific and technical progress is the stage of development of the most 
advanced processes, facilities, and operating methods that, according to the opinion of lea 
ding science and technology experts, and on the basis of new, scientifically supportable 
knowledge with regard to the statutory objective, are considered as being necessary. 
State of The Art 
The state of the art is the stage of development of advanced processes, facilities, or operating 
methods whereby the practical adequacy of a measure to ensure installation safety generally 
appears to have been confirmed. 
Static Loads or Quasi-Static Loads on the Subsoil 
These result from impacts which principally have magnitudes with a monotonic structure and 
only change insignificantly or which only occur rarely (as maximum magnitude). 
Status Report 
Report concerning the condition of offshore structures, including the monitoring report from 
the periodic inspections of the offshore structures. 
Subsoil 
System composed of one or multiple layers of soil or rock, including all substances (for ex 
ample ground water and contaminations) in and on which the structures are or are to be foun 
ded or embedded and which will be influenced by the construction project (DIN 4020). 
Subsoil Model 
The subsoil model is the simplified geometrical model of the subsoil conditions at the location 
of a structural facility, defined as a geometrical formation of homogeneous areas (layers) for 
which uniform characteristic values of the geotechnical parameters are indicated in order to 
design the foundation elements of the structural facility. 
Substructure 
Part of the support structure above the foundation elements and underneath the tower (off 
shore wind turbine) or the top deck (offshore substation), please refer to B1.1. 
Suction Bucket Foundation 
The suction bucket foundation was developed on the basis of the suction caisson foundation 
frequently used in offshore technology. This is a combination of pile foundation and heavy 
weight foundation.