Until 1941, SVK was charged with the development of all German Naval mines, includ-ing aircraft types. The specifications and requirements for the mines were laid down by the General Staff, after consultation with SVK. If, during the progress of the work, it was found that original requirements could not be met, the specifications were modified ac-cordingly. In addition, SVK furnished first drafts of instructional and operational pam-phlets, as required by Mine Inspection SI (Sperrwaffeninspektion), and made manufactur-ing drawnings of the mines and mine components for contracting firms.