Abstract: A control device for a vessel, the control device comprises: an operation monitoring unit configured to monitor presence or absence of a supply of first electric power supplied from a power supply to an operation display unit for operating the vessel; a drive monitoring unit configured to monitor presence or absence of a supply of second electric power supplied from the power supply to a drive source of the vessel; and a caution control unit configured to cause a caution output device to output a caution based on information indicating the presence or the absence of the supplies of the first electric power and the second electric power that have been respectively acquired from the operation monitoring unit and the drive monitoring unit.

Abstract: In a cogeneration apparatus having a power generation unit equipped with a power generator, an internal combustion engine, and a hot water tank connected to the engine through a heat exchanger, there are provided a first pump provided at a flow channel connecting the engine to the heat exchanger and a second pump provided at a second flow channel connecting the heat exchanger to the hot water tank. A temperature of the engine cooling water heated by the engine and a temperature difference between the temperature and a temperature of the engine cooling water cooled by the heat exchanger is determined and based on the determined values, flow rates of the first and second pumps are controlled.

Abstract: In a cogeneration apparatus having a power generation unit equipped with a power generator, an internal combustion engine, and a hot water tank connected to the engine through a heat exchanger, there are provided a first pump provided at a flow channel connecting the engine to the heat exchanger and a second pump provided at a second flow channel connecting the heat exchanger to the hot water tank. A temperature of the engine cooling water heated by the engine and a temperature difference between the temperature and a temperature of the engine cooling water cooled by the heat exchanger is determined and based on the determined values, flow rates of the first and second pumps are controlled.