One of the options for the development of ecotourism on the Danube. Construction of a small fleet, with the ability to use at shallow depths. The crew is two people, tourists up to 10 people. On board a device for living drinking water, devices for bioresonance diagnostics and therapy, all kinds of health programs. Diagnostics before and after the flight. Eco food. Can be viewed as an office vacation or combine vacation with work. Individually ready to make an office afloat, while traveling along the Danube, you keep on working. Three options: diesel fuel efficient, hybrid and electric.