A working machine (102) can be a steering system (110),a user interface (128, 150),include a detection device (126) and a control device (124). The user interface (128, 150) can generate an input signal corresponding to the operator's input. The detection device (126) can generate an identification signal corresponding to the presence of an operator in relation to the user interface (128, 150). The control device (124) may determine that the operator is not available on the basis of the identification signal and the input signal and a locking mode based on the observation that the operator is not available,Activate. The control device (124) can detect a readiness indicator in the case of activated locking mode. The readiness indicator may confirm the readiness of the operator based on the determination that the recognition signal fulfils a readiness criterion. The control device (124) may disable the locking mode based on the determination that the standby criterion is fulfilled.
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