There is an ongoing discussion on grey zone deterrence and how states should deal with grey zone situations. Most studies are based around Russian actions in Crimea and Chinas actions in the East and South China Sea. The objective of this paper is to create a better understanding of the grey zone deterrence and the handling of grey zone situations by the Swedish navy. The method for achieving this is a text analysis of Swedish strategic, operative, and tactical doctrines. The result of the analysis shows that there is a discussion of grey zone deterrence on the operative level in the Swedish armed forces, where the Swedish navy can assist the police, coast guard, customs et.al. There is only a limited and implicit discussion on the tactical level specifically for naval units.  The conclusion of this paper is that the Swedish navy can work with other governmental departments to handle grey zone situations, however the Swedish navy is limited in the ability to handle grey zone situations independently.