System for ascertaining prediction data, wherein the system has: a floating unit, and a base unit arranged remote from the floating unit, wherein the floating unit has a buoyant or stationary coupling unit, a buoyant floating hose and a detection system, wherein a first end of the floating hose is connected to the coupling unit, wherein the detection system is designed to detect, as actual arrangement, a present geometric arrangement of the floating hose relative to the coupling unit, wherein the detection system is designed to detect and/or ascertain, as actual location, a present geographical location of the floating unit, wherein the detection system is configured to ascertain actual location data which represent the actual location and the actual arrangement, wherein the floating unit and the base unit are designed to be couplable via a signal link, wherein the floating unit is designed to transmit the actual location data via the signal link to the base unit, characterized in that the base unit is designed to receive, as actual weather data, present weather data which represent the present wind strength, the present wind direction, a prediction of the wind strength and/or a prediction of the wind direction in each case of the wind at the actual location, wherein the base unit is designed to receive, as actual sea data, present sea data which represent the present current strength, the present current direction, a prediction of the current strength and/or a prediction of the current direction in each case of the water at the actual location, and wherein the base unit is configured to ascertain prediction data on the basis of the actual location data, the actual weather data and the actual sea data, with the result that the prediction data represent a prediction of a geographical target location of the floating hose at a future, predetermined point in time and/or with the result that the prediction data represent a prediction of a geometric target arrangement of the floating hose relative to the coupling unit for the future, predetermined point in time. a floating unit, and a base unit arranged remote from the floating unit, wherein the floating unit has a buoyant or stationary coupling unit, a buoyant floating hose and a detection system, wherein a first end of the floating hose is connected to the coupling unit, wherein the detection system is designed to detect, as actual arrangement, a present geometric arrangement of the floating hose relative to the coupling unit, wherein the detection system is designed to detect and/or ascertain, as actual location, a present geographical location of the floating unit, wherein the detection system is configured to ascertain actual location data which represent the actual location and the actual arrangement, wherein the floating unit and the base unit are designed to be couplable via a signal link, wherein the floating unit is designed to transmit the actual location data via the signal link to the base unit, characterized in that the base unit is designed to receive, as actual weather data, present weather data which represent the present wind strength, the present wind direction, a prediction of the wind strength and/or a prediction of the wind direction in each case of the wind at the actual location, wherein the base unit is designed to receive, as actual sea data, present sea data which represent the present current strength, the present current direction, a prediction of the current strength and/or a prediction of the current direction in each case of the water at the actual location, and wherein the base unit is configured to ascertain prediction data on the basis of the actual location data, the actual weather data and the actual sea data, with the result that the prediction data represent a prediction of a geographical target location of the floating hose at a future, predetermined point in time and/or with the result that the prediction data represent a prediction of a geometric target arrangement of the floating hose relative to the coupling unit for the future, predetermined point in time.