The Rhine ferry between Plittersdorf (Germany) and Seltz (France) works on the same princinple, transporting 100,000 cars, 60,000 bicycles and 30,000 pedestrians per year.,(reply>), @M9IN0G Upstream is the direction from <br>which the water comes from, down stream <br>is where it winds up or is headed.,(reply>), He means a way to move against the current. Directly would be impossible, but with a speed reduction, at up to about a 45 Degree angle would be possible as in how a sailing boat sails into wind currents.,(reply>), What do you mean by "upstream"?,(reply>), @itsMEE1111 I don't think it actually needs to due to the river currents there, but you can as long as one anchors it on the guide rope right to stop drifting back down stream, this is basically how one sails into the wind.