N-SEA carried out geophysical and environmental survey works for the Forthwind Offshore Demonstration Array, using the survey vessel Braveheart Spirit. The scope included multibeam echosounder (MBES), side-scan sonar (SSS), magnetometer and sub-bottom profiler (SBP) acquisition, plus environmental survey activities including drop-down video and grab sampling within the offshore windfarm location and export cable route corridor area.