20 
Part B - Verifications and approval requirements 
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elements 
Figure 1-2: Components of the overall mechanical system of an “offshore station”. 
This is the case, for example, when measuring the natural frequencies and loading assump 
tions of the offshore wind turbine. 
The test procedure principally includes the following elements and steps: 
(1) Type certificate for the rotor/nacelle assembly in the case of an offshore wind turbine; in 
the case of an offshore station the functional description and design concept, 
(2) Examination of the design basis, incl. site-specific conditions, such as the subsoil proper 
ties (site assessment), 
(3) Test of the site-specific loading assumptions and the support structure as well as the 
foundation elements (site-specific design evaluation), 
(4) In the case of an offshore wind turbine: Examination to determine that the type certificate 
(1) for the rotor/nacelle assembly actually incorporates all the site-specific conditions; in 
the case of an offshore station: Update and more detailed specification of the respective 
concepts, 
(5) Certificate of conformity/verification report for the site-specific design of the offshore 
structures following completion of items (1) to (4), 
(6) Test and evaluation of the facilities for inspecting offshore wind turbines as an overall sys 
tem (Supervisory Control and Data Acquisition, SCADA, including the Condition Monito 
ring System, CMS, for the rotor/nacelle assembly);