Gearbox for a dredging vessel

A manoeuvrable trailing dredging vessel comprising;

• a vessel propulsion member coupled with a propulsion shaft provided with a single gear for driving the propulsion member,
• a drive system having a central drive shaft coupled with the vessel propulsion member for providing power to the vessel propulsion member,
• a transmission device having at least a trailing transmission shaft provided with a trailing pinion and a sailing transmission shaft provided with a sailing pinion, the trailing pinion having a higher gear ratio than the sailing pinion;
• wherein the central drive shaft is coupled with the single gear of the propulsion shaft through one of the trailing transmission shaft and the sailing transmission shaft;
• and wherein the central drive shaft, the trailing transmission shaft and the sailing transmission shaft extend above the propulsion shaft,
• wherein the central drive shaft, the trailing transmission shaft and the sailing transmission shaft extend in one shaft plane such that a divisible shaft housing may have a dividing line extending in said shaft plane;
• wherein the trailing transmission shaft and the sailing transmission shaft each are provided with a respective clutch device for uncoupling and coupling with the central drive shaft in a driving manner;
• and
• wherein the respective clutch devices of the trailing transmission shaft and the sailing transmission shaft are arranged outside a shaft housing.