Efficiently generating electric power without polluting the environment becomes increasingly important in times of high commodity prices and growing environmental awareness among consumers. Within the scope of the OGOWin research project for building up a first prototype of a jacket-construction-type offshore wind power plant, HBM supplies and installs test and measurement equipment for a test plant in Bremerhaven, Germany. The challenge is to install the equipment such that it also withstands the extreme stresses to which the production models will be subjected later when used in rough sea conditions.