A regional aeromagnetic survey has been carried out in the North Sea called the Central North Sea Aeromagnetic Survey 2010 (CNAS-10). The acquisition was carried out during the period 26 May – 12 October 2010. The airborne magnetic survey was conducted with constant flight-line orientations. In-lines were running E-W-oriented with perpendicular tie-lines N-S (c. -6° off geogr. N).