The controllers of these diesels do not move round in notches, so that the driver's only sure guide to the way in which he is working his locomotive is hisammeter, corresponding in a way to the steam-chest pressure gauge of a steam locomotive. When the diesel was being worked full out, theammeter normally showed about 1,500-1,600 amps, with occasional surges of current at starting or up the steepest gradients to 1,700 or even 1,800 amps.
