Surgical instrument with orientation sensor having different modes and a user identified heading

An orientation sensor comprising:

• an orientation sensing component, wherein the orientation sensing component is configured to detect a plurality of orientation data, wherein the orientation sensor is configured to be mounted to an instrument body such that when the orientation sensor is mounted to the instrument body the orientation sensing component would be at least partially fixed relative to the instrument body such that a change in orientation of the instrument body in at least one direction would be detected by the orientation sensing component;
• a display, wherein the display is configured to display at least one orientation value, that is associated with the plurality of orientation data, in real-time;
• and
• a user input device, wherein the user input device is configured to set a heading that is coplanar with a horizontal plane that is perpendicular to a direction of gravity, in response to the user input device receiving a predetermined user input, based on the orientation of the orientation sensing component when the predetermined user input is received by the user input device, wherein the at least one orientation value is based on the heading set by the user input device.

An orientation sensor comprising:

• an orientation sensing component, wherein the orientation sensing component is configured to detect a plurality of orientation data, wherein the orientation sensor is configured to be mounted to an instrument body such that when the orientation sensor is mounted to the instrument body the orientation sensing component would be at least partially fixed relative to the instrument body such that a change in orientation of the instrument body in at least one direction would be detected by the orientation sensing component;
• a display, wherein the display is configured to display at least one orientation value, that is associated with the plurality of orientation data, in real-time;
• and
• a user input device, wherein the user input device is configured to set a heading, in response to the user input device receiving a predetermined user input, based on the orientation of the orientation sensor when the predetermined user input is received by the user input device, wherein the at least one orientation value is based on the heading set by the user input device;
• wherein the orientation data includes rotation data relative to an X-axis, a Y-axis, and a Z-axis, the Y-axis being perpendicular to the X-axis, and the Z-axis being perpendicular to the X-axis and the Y-axis;
• and
• wherein the user input device is configured to set the heading, in response to the user input device receiving the predetermined user input, by only zeroing a rotation about the Z-axis, wherein the heading is entirely within a horizontal plane that is perpendicular to a direction of gravity and the Z-axis.