An aircraft instrument system comprising: an input device configured to receive an input command; a display screen configured to display information on a sliding scale including a first flight parameter value associated with a first flight parameter; and a processing device coupled to said input device and said display screen, said processing device configured to: determine at least one parameter limit (60, 62) for the first flight parameter, wherein the at least one parameter limit comprises a minimum value and a maximum value; provide the parameter limit (60,62) to said display screen for display on the sliding scale; receive an adjustment signal from said input device that corresponds to a manual adjustment of the parameter value from the first flight parameter value to a second flight parameter value; provide the second flight parameter value to said display screen for display on the sliding scale; wherein the vehicle instrumentation system further comprises at least one sensor coupled to the processing device and configured to provide sensor data signals to the processing device, wherein the sensor data signals correspond to measurements of airspeed, altitude, geographical location, aircraft component status, aircraft component operating conditions, weather conditions or any other measurable flight condition of the vehicle, wherein the processing device is configured to apply the sensor data signals in the determining of the at least one parameter limit; characterized in that said processing device is configured to: prohibit adjustment of the first flight parameter value to a value greater than the maximum value or less than the minimum value, wherein the first flight parameter value and the second flight parameter value are not greater than the maximum value and are not less than the minimum value. an input device configured to receive an input command; a display screen configured to display information on a sliding scale including a first flight parameter value associated with a first flight parameter; and a processing device coupled to said input device and said display screen, said processing device configured to: determine at least one parameter limit (60, 62) for the first flight parameter, wherein the at least one parameter limit comprises a minimum value and a maximum value; provide the parameter limit (60,62) to said display screen for display on the sliding scale; receive an adjustment signal from said input device that corresponds to a manual adjustment of the parameter value from the first flight parameter value to a second flight parameter value; provide the second flight parameter value to said display screen for display on the sliding scale; wherein the vehicle instrumentation system further comprises at least one sensor coupled to the processing device and configured to provide sensor data signals to the processing device, wherein the sensor data signals correspond to measurements of airspeed, altitude, geographical location, aircraft component status, aircraft component operating conditions, weather conditions or any other measurable flight condition of the vehicle, wherein the processing device is configured to apply the sensor data signals in the determining of the at least one parameter limit; determine at least one parameter limit (60, 62) for the first flight parameter, wherein the at least one parameter limit comprises a minimum value and a maximum value; provide the parameter limit (60,62) to said display screen for display on the sliding scale; receive an adjustment signal from said input device that corresponds to a manual adjustment of the parameter value from the first flight parameter value to a second flight parameter value; provide the second flight parameter value to said display screen for display on the sliding scale; wherein the vehicle instrumentation system further comprises at least one sensor coupled to the processing device and configured to provide sensor data signals to the processing device, wherein the sensor data signals correspond to measurements of airspeed, altitude, geographical location, aircraft component status, aircraft component operating conditions, weather conditions or any other measurable flight condition of the vehicle, wherein the processing device is configured to apply the sensor data signals in the determining of the at least one parameter limit; prohibit adjustment of the first flight parameter value to a value greater than the maximum value or less than the minimum value, wherein the first flight parameter value and the second flight parameter value are not greater than the maximum value and are not less than the minimum value.