Part B - Verifications and approval requirements 
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The basic documents also include meteorological and oceanographic expert opinions that 
provide the following basic data: 
• Water levels, 
• Scatter diagrams illustrating the relevant wave heights, 
• Wind, wave and poss. ice parameters, 
• Correlation of wind, waves and poss. ice drift, 
• Currents, 
• Bathymetry, 
• Sea water characteristics (density, salt content, temperature bandwidth etc.), 
• Conditions that influence scouring, 
• Growth and 
• Conditions that influence corrosion. 
The hull-retaining properties of the support structure of an offshore structure in the case of a 
collision must also be accordingly demonstrated (“collision-friendliness”). Special assess 
ment criteria apply to offshore stations with regard to ensuring the best-possible design of the 
support structure with regard to its hull-retaining properties (please refer to chapter B2.1.1). 
The design rules are defined in the design basis, whereby the design standards and regula 
tions to be applied, together with their hierarchy with respect to the final design of the offshore 
structure, shall be clearly stipulated. It should be easy to derive which code of practice should 
be applied in the case of each respective certification. The hierarchy of standards also takes 
account of the issues resulting from the implementation phase and places particular impor 
tance on the requirements posed by an “offshore” location. Furthermore, the functional spec 
ifications and requirements placed on the primary and secondary support structures of off 
shore wind turbines and offshore substations shall be defined accordingly. 
Planning results must also be presented alongside the basic documents and design rules. The 
preliminary planning results include a detailed project description. 
The project description includes the following information: 
• Preliminary wind farm layout (the locations of the offshore wind turbines, offshore station 
and all other poss. structures), 
• The approach path to the helicopter landing pad (in as far as one is planned), 
• Preliminary cable layout, 
• Basic information on the planned foundation concepts: 
- Max. required space, 
- Max. required surface area, 
- Estimate of the net flow cross-section, 
- Max. expected seabed penetration, 
• Basic system data: 
- System type (e.g. “three-rotor, windward runner, variable speed control with adjustable 
rotors”), 
- Max. hub height, max. rotor diameter, max. rated output of the offshore wind turbine, 
• Basic offshore station information: 
- Intended purpose (converter, substation, accommodation etc.), 
- Max. dimensions of the offshore station, 
- Basic information on the planned foundation concepts (please refer to the above).