An electric underwater jet propulsion system, comprising - an electric underwater jet motor, containing at least one radial stator (1.1), at least one rotor (1.2), at least two impeller blades (1.3), a magnetic bearing (1.4), at least one permanent magnet bar (1.5), at least one axial stator (1.6), hydrodynamic bearing components (1.7), a motor housing (1.8) and a motor fastener (1.9), - a hydrodynamic jet engine housing, and - a control unit including a microprocessor (3.1), software (3.2), magnetic bearing distance sensors (3.3), counter and speed measurement sensors (3.4), gyroscopic balance sensors (3.5), heat and humidity sensors (3.6), pressure measurement sensors (3.7), voltage and ampere measurement sensors (3.8), a motor drive circuit (3.9), software algorithms (3.10), an energy management system (3.11), a control panel (3.12), batteries (3.13), and battery charging components (3.14), the hydrodynamic jet motor housing comprising a flow straightener (2.2), diffuser blades (2.4), a nozzle (2.3), the nozzle (2.3) having a conical shape which increases the speed of the fluid exiting the electrical underwater jet motor by reducing its pressure, and having moving parts that regulate the output diameter of the nozzle (2.3), and a hydraulic system (2.1) which is adapted for adjusting steering, direction and the moving parts of the nozzle (2.3), the diffuser blades (2.4) being adapted for reducing the turbulence of the water jet coming out of the electric underwater jet motor and correcting the flow through the exit angle in axial direction from the impeller blades, and wherein the impeller blades (1.3) are a propeller fixed to a rotor ring (1.2) without a pivot shaft. - an electric underwater jet motor, containing at least one radial stator (1.1), at least one rotor (1.2), at least two impeller blades (1.3), a magnetic bearing (1.4), at least one permanent magnet bar (1.5), at least one axial stator (1.6), hydrodynamic bearing components (1.7), a motor housing (1.8) and a motor fastener (1.9), - a hydrodynamic jet engine housing, and - a control unit including a microprocessor (3.1), software (3.2), magnetic bearing distance sensors (3.3), counter and speed measurement sensors (3.4), gyroscopic balance sensors (3.5), heat and humidity sensors (3.6), pressure measurement sensors (3.7), voltage and ampere measurement sensors (3.8), a motor drive circuit (3.9), software algorithms (3.10), an energy management system (3.11), a control panel (3.12), batteries (3.13), and battery charging components (3.14), the hydrodynamic jet motor housing comprising a flow straightener (2.2), diffuser blades (2.4), a nozzle (2.3), the nozzle (2.3) having a conical shape which increases the speed of the fluid exiting the electrical underwater jet motor by reducing its pressure, and having moving parts that regulate the output diameter of the nozzle (2.3), and a hydraulic system (2.1) which is adapted for adjusting steering, direction and the moving parts of the nozzle (2.3), the diffuser blades (2.4) being adapted for reducing the turbulence of the water jet coming out of the electric underwater jet motor and correcting the flow through the exit angle in axial direction from the impeller blades, and wherein the impeller blades (1.3) are a propeller fixed to a rotor ring (1.2) without a pivot shaft. a flow straightener (2.2), diffuser blades (2.4), a nozzle (2.3), the nozzle (2.3) having a conical shape which increases the speed of the fluid exiting the electrical underwater jet motor by reducing its pressure, and having moving parts that regulate the output diameter of the nozzle (2.3), and a hydraulic system (2.1) which is adapted for adjusting steering, direction and the moving parts of the nozzle (2.3), the diffuser blades (2.4) being adapted for reducing the turbulence of the water jet coming out of the electric underwater jet motor and correcting the flow through the exit angle in axial direction from the impeller blades, and wherein the impeller blades (1.3) are a propeller fixed to a rotor ring (1.2) without a pivot shaft.