A working machine comprising: a working arm； a hitch arrangement attached to the working arm and configured to be removably secured to a working implement； one or more sensors configured to determine an orientation of a working implement secured to the hitch arrangement and to output a signal indicative of the orientation of a working implement secured to the hitch arrangement with respect to gravity； and a control module configured to receive the signal from the one or more sensors and to perform a safety function in response to receipt of the signal such that the safety function is performed if the orientation of a working implement secured to the hitch arrangement with respect to gravity is an unpermitted orientation.
