The purpose of this cruise, led by the Institute of Marine Research (IMR) was to investigate pelagic and demersal fish, seabed, benthic habitat and physical oceanography in and outside Hywind Tampen floating wind farm. The cruise also installed the ObsFAD (FAD with sensors for monitoring the environment and fish). The observations will be used in the WindSys project to evaluate the potential impact of sea wind farms on the environment.