This article is an attempt to interest the subjects associated with maritime technology — in the possibilities of increasing the safety of Polish Navy ships (or civilian ships), which may be threatened by attacks of maneuvering missiles and drones moving at low altitude at high speed. The concept proposed by the team was initially verified in simulation tests and the obtained results of these studies indicate that the automated missile self-defence system based on guided and unguided missiles with caliber 40 mm and 70 mm, can be an effective means of self-defence (even the smallest vessels). Small dimensions and mass as well as simplicity of use and reliability of this weapon system allow to believe that 40 mm MLRS