A floating structure has a hull and a propeller propulsion system having a gear arrangement that is connected via a first intermediate shaft to at least one electromotor, the electromotor being arranged onboard the floating structure, and via a second intermediate shaft to a propeller. The gear arrangement has an angular gear. The first intermediate shaft forms an angle relative to the second intermediate shaft. The gear arrangement is arranged as a separate unit in an appendage or addition to the hull of the floating structure. The appendage or addition is designed to allow an interior thereof to be accessed from within the vessel, whereby maintenance, replacement, or repairs of the gear arrangement can be carried out. The angular gear has at least one angled gearwheel set and one cylindrical gearwheel set.