Power supply and operating system for ships and offshore units, having at least one internal combustion engine (2, 3, 4), having at least one electric generator (5, 6, 7), wherein each internal combustion engine (2, 3, 4) is connected to an electric generator (5, 6, 7), having at least one electric motor (10, 11, 12, 18), which can be supplied with electrical energy by the at least one electric generator (5, 6, 7), and/or having at least one combustion engine, wherein by means of the at least one electric motor (10, 11, 12, 18) and/or the at least one combustion engine, at least one ship propeller (13, 14, 15, 19) can be driven, having a ship network, which can be supplied with electrical energy by means of the at least one electric generator (5, 6, 7), having at least one power distributor unit (8, 9), which is arranged between the at least one electric generator (5, 6, 7), on the one hand, and possibly the at least one electric motor (10, 11, 12, 18) and input-side units of the ship network, on the other, and having a control device (23, 24), by means of which as a function of operating data of each internal combustion engine (2, 3, 4), of each electric generator (5, 6, 7), of each electric motor (10, 11, 12, 18) and/or of each combustion engine, of each ship propeller (13, 14, 15, 19), of the input-side units of the ship network and of each energy distributor unit (8, 9), control signals can be used to control each internal combustion engine (2, 3, 4), each electric generator (5, 6, 7), each electric motor (10, 11, 12, 18) and/or each combustion engine, each ship propeller (13, 14, 15, 19), the input-side units of the ship network and each power distributor unit (8, 9), wherein the control device (23, 24) has a control unit and a diagnostic unit, in which the transmitted operating data and the control signals output by the control unit can be detected and saved in a storage medium, and which can be remotely accessed via the internet and/or suitable data paths, characterized in that the at least one ship propeller (13, 14, 15, 19) has propeller blades that can be adjusted by means of the control device (23, 24), in that the diagnostic unit is assigned an evaluation unit, by means of which an optimized operating procedure can be calculated for each internal combustion engine (2, 3, 4) taking into account the detected operating data and control signals and a current requirement profile for each internal combustion engine (2, 3, 4), and by means of which an optimized operating procedure can be calculated for each ship propeller (13, 14, 15, 19) taking into account the detected operating data and control signals and a current requirement profile. having at least one internal combustion engine (2, 3, 4), having at least one electric generator (5, 6, 7), wherein each internal combustion engine (2, 3, 4) is connected to an electric generator (5, 6, 7), having at least one electric motor (10, 11, 12, 18), which can be supplied with electrical energy by the at least one electric generator (5, 6, 7), and/or having at least one combustion engine, wherein by means of the at least one electric motor (10, 11, 12, 18) and/or the at least one combustion engine, at least one ship propeller (13, 14, 15, 19) can be driven, having a ship network, which can be supplied with electrical energy by means of the at least one electric generator (5, 6, 7), having at least one power distributor unit (8, 9), which is arranged between the at least one electric generator (5, 6, 7), on the one hand, and possibly the at least one electric motor (10, 11, 12, 18) and input-side units of the ship network, on the other, and having a control device (23, 24), by means of which as a function of operating data of each internal combustion engine (2, 3, 4), of each electric generator (5, 6, 7), of each electric motor (10, 11, 12, 18) and/or of each combustion engine, of each ship propeller (13, 14, 15, 19), of the input-side units of the ship network and of each energy distributor unit (8, 9), control signals can be used to control each internal combustion engine (2, 3, 4), each electric generator (5, 6, 7), each electric motor (10, 11, 12, 18) and/or each combustion engine, each ship propeller (13, 14, 15, 19), the input-side units of the ship network and each power distributor unit (8, 9), wherein the control device (23, 24) has a control unit and a diagnostic unit, in which the transmitted operating data and the control signals output by the control unit can be detected and saved in a storage medium, and which can be remotely accessed via the internet and/or suitable data paths, characterized in that the at least one ship propeller (13, 14, 15, 19) has propeller blades that can be adjusted by means of the control device (23, 24), in that the diagnostic unit is assigned an evaluation unit, by means of which an optimized operating procedure can be calculated for each internal combustion engine (2, 3, 4) taking into account the detected operating data and control signals and a current requirement profile for each internal combustion engine (2, 3, 4), and by means of which an optimized operating procedure can be calculated for each ship propeller (13, 14, 15, 19) taking into account the detected operating data and control signals and a current requirement profile.