Map of the Kattegat
<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Maximilian Dörrbecker</a> (<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Chumwa</a>)
CC BY-SA 2.5
<span class="int-own-work" lang="en">Own work</span>, using <a href="//commons.wikimedia.org/wiki/File:North_Sea_location_map.svg" title="File:North Sea location map.svg">this file</a> by <a href="//commons.wikimedia.org/wiki/User:NordNordWest" title="User:NordNordWest">NNW</a>