NOVELTY - The arrangement comprises an energy source (a1) present in the form of liquid organic hydrogen carrier, which is a drive that is driven with fossil fuels or a nuclear power drive, a storage tank (b) for oxygen or air, a chemical reactor (c) for the creation of hydrogen from a substrate with an expanded pi conjugated system by chemical reaction using hydrogen, a fuel cell (d) for producing direct current and water, an electric drive (i), which converts the direct current in forward movement, and an electrolyzer for converting water from the storage tank into hydrogen and oxygen.    USE - The arrangement is useful for electrically driving submarine ships while traveling above water and for loading a storage at high energy-substrate for submarine ships while traveling above water (all claimed).    ADVANTAGE - The arrangement is capable of safely and efficiently driving the submarine ships without explosion risks by economically producing energy with high density, and enables manned or unmanned operation of the ships in a regular manner.    DETAILED DESCRIPTION - The arrangement comprises an energy source (a1) present in the form of liquid organic hydrogen carrier, which is a drive that is driven with fossil fuels or a nuclear power drive, a storage tank (b) for oxygen or air, a chemical reactor (c) for the creation of hydrogen from a substrate with an expanded pi conjugated system by chemical reaction using hydrogen, a fuel cell (d) for producing direct current and water, an electric drive (i), which converts the direct current in forward movement, an electrolyzer for converting the water from the storage tank into hydrogen and oxygen using the direct current from the energy source, and a storage for the energy-rich substrate generated in the reactor. The chemical reactor and the fuel cell are used with the storage tank to drive an electrical marine engine. The substrate, in the chemical reactor, is partially: hydrogenated at a temperature of 50-180 degrees C and at a pressure of 2-200 bar in the presence of a catalyst; and dehydrogenated at a temperature of 120-250 degrees C and at normal pressure in the presence of the catalyst. INDEPENDENT CLAIMS are included for:    (1) a method of electrically driving submarine ships; and    (2) a substrate with the expanded pi -conjugated system.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an arrangement for electrically driving submarine ships.    Energy source (a1)    Storage tank (b)    Chemical reactor (c)    Fuel cell (d)    Electric drive. (i)