Patent ID: 8907887

Claim:
A method for operating an avionics system comprising a headset and a head-up display (HUD) device in an aircraft, the method comprising: determining when the headset is in a specific starting position at a predetermined position in the aircraft and when the headset is in a specific starting orientation when the HUD device is in a first state of operation; determining when the headset is moved starting from the specific starting position and the specific starting orientation in the aircraft according to a predefined set of movements; switching, only in response to the determining when the headset is moved starting from the specific starting position and the specific starting orientation in the aircraft according to the predefined set of movements, the HUD device from the first state of operation to a second state of operation; and causing the HUD device to remain in the second state of operation when the headset returns to the predetermined position and predetermined orientation; wherein determining when the headset is moved starting from the specific starting position and the specific starting orientation in the aircraft according to the predefined set of movements further comprises: receiving, from a motion tracker, position coordinates and orientation coordinates having a first number of degrees of freedom; transforming the position coordinates and orientation coordinates having the first number of degrees of freedom to a data set having a second number of degrees of freedom, the second number of degrees of freedom having fewer degrees of freedom than the first number of degrees of freedom; and determining when the headset is moved starting from the specific starting position and the specific starting orientation in the aircraft according to the predefined set of movements based upon the data set having the second number of degrees of freedom.