This is the engjne/boiler room of that old dredger in the Gloucester Dicks, featuring our lovely lady engineer. There is not a lot of room and shovelling coal into the boiler, the other side of the engine, must have been hell with the heat and noise. The boiler was converted to burning diesel years ago and an air fan fitted.
There are two large (and long) belts, one each side, going to the top of the bucket chain tower, big gearbox up there actually driving the chain. Those belts are made from six thicknesses of buffalo hide (much tougher than cowhide it seems) rivetted together. They are praying these do not break, there aren't many buffalo on the vast plains of Gloucestershire these days!
The big wheel is the forward/reverse selector and the lever top right is the regulator. Well, there are only two choices to "regulate", stop and go.