Apparatus and method to indicate instrument saturation

1. An electronics display instrument configured to display aircraft course deviation, the instrument comprising:

an input to receive a signal yielded from a comparison of navigation information of the aircraft and position information of the aircraft; and

an output to convey the signal by displaying a conditional symbol on a limited measurement scale, wherein the conditional symbol corresponds to a conventional readout of an instrument configured to display aircraft course deviation, and wherein the conditional symbol is moveable from a first extreme to a second extreme with a central position therebetween;

wherein the conditional symbol being in the central position indicates the aircraft is on course, and the conditional symbol being in the first or second extreme positions indicates the aircraft is off course in a first or a second direction by an amount at least equal to the measurement scale;

wherein the conditional symbol has a first form to indicate that the aircraft is off course by an amount within the measurement scale, and a second form to indicate that the aircraft is off course by an amount in excess of the measurement scale.

2. The instrument according to claim 1 , wherein if the conditional symbol is between the first extreme and the second extreme, then the conditional symbol is in the first form.

3. The instrument according to claim 1 , wherein if the conditional symbol is at the first extreme or the second extreme and the aircraft is off course by an amount in excess of the measurement scale, then the conditional symbol is in the second form.

4. The instrument according to claim 1 , wherein the first form indicates that the conditional symbol is accurate and the second form indicates that the conditional symbol is not accurate with respect to the measurement scale.

5. The instrument according to claim 1 , wherein the conditional symbol is a bar and the first form is the bar in a solid form and the second form is the bar in an outlined form.

6. The instrument according to claim 1 , wherein the position information is displayed in real time.

7. An electronics display instrument configured to display information, the instrument comprising:

an output to convey information by displaying a conditional symbol on a limited measurement scale, wherein the conditional symbol corresponds to a conventional readout of an instrument configured to display information, and wherein the conditional symbol is moveable from a first extreme to a second extreme with a central position therebetween;

wherein the conditional symbol being in the central position indicates a first condition, and the conditional symbol being in the first or second extreme positions indicates a deviation from the first condition by an amount at least equal to the measurement scale;

wherein the conditional symbol has a first form to indicate the deviation from the first condition by an amount within the measurement scale, and a second form to indicate the deviation from the first condition by an amount in excess of the measurement scale.

8. The instrument according to claim 7 , wherein if the conditional symbol is between the first extreme and the second extreme, then the conditional symbol is in the first form.

9. The instrument according to claim 7 , wherein if the conditional symbol is at the first extreme or the second extreme and the deviation from the first condition is by an amount in excess of the measurement scale, then the conditional symbol is in the second form.

10. The instrument according to claim 7 , wherein the first form indicates that the conditional symbol is accurate and the second form indicates that the conditional symbol is not accurate with respect to the measurement scale.

11. The instrument according to claim 7 , wherein the conditional symbol is a bar and the first form is the bar in a solid form and the second form is the bar in an outlined form.

12. The instrument according to claim 7 , wherein the information is displayed in real time.

13. An electronics display instrument configured to display information, the instrument comprising:

an input to receive a signal yielded from a comparison of a first information and a second information; and

an output to convey the signal by displaying a conditional symbol on a limited measurement scale, wherein the conditional symbol corresponds to a conventional readout of an instrument configured to display information, and wherein the conditional symbol is moveable from a first extreme to a second extreme with a central position therebetween;

wherein the conditional symbol being in the central position indicates a first condition, and the conditional symbol being in the first or second extreme positions indicates a deviation from the first condition by an amount at least equal to the measurement scale;

wherein the conditional symbol has a first form to indicate the deviation from the first condition by an amount within the measurement scale, and a second form to indicate the deviation from the first condition by an amount in excess of the measurement scale.

14. The instrument according to claim 13 , wherein if the conditional symbol is between the first extreme and the second extreme, then the conditional symbol is in the first form.

15. The instrument according to claim 13 , wherein if the conditional symbol is at the first extreme or the second extreme and the deviation from the first condition is by an amount in excess of the measurement scale, then the conditional symbol is in the second form.

16. The instrument according to claim 13 , wherein the first form indicates that the conditional symbol is accurate and the second form indicates that the conditional symbol is not accurate with respect to the measurement scale.

17. The instrument according to claim 13 , wherein the conditional symbol is a bar and the first form is the bar in a solid form and the second form is the bar in an outlined form.

18. The instrument according to claim 13 , wherein the information is displayed in real time.

19. A method of conveying aircraft course deviation using an electronics display instrument, the method comprising:

receiving an input signal yielded from a comparison of navigation information and position information;

displaying, via the electronics display instrument, the aircraft course deviation with a symbol on a scale, the scale having a limited range including a first extreme, a second extreme and a central position therebetween;

positioning the symbol at the central position to indicate the aircraft is on course, and positioning the symbol at the first or second extreme positions to indicate the aircraft is off course in a first or second direction by an amount at least equal to the scale; and

varying a symbol appearance depending on whether the aircraft course deviation is measurable by the scale having the limited range.

20. The method according to claim 19 , further comprising:

displaying the symbol appearance in one of a first form if the aircraft course deviation is measurable by the scale and a second form if the aircraft course deviation is not measurable by the scale.

21. A method of conveying information using an electronics display instrument, the method comprising:

displaying information, via the electronics display instrument, with a symbol on a scale, the scale having a limited range including a first extreme, a second extreme and a central position therebetween;

positioning the symbol at the central position to indicate a first condition, and positioning the symbol at the first or second extreme positions to indicate a deviation from the first condition in a first or second direction by an amount at least equal to the scale; and

varying a symbol appearance depending on whether the information is measurable by the scale having the limited range.

22. The method according to claim 21 , further comprising:

displaying the symbol appearance in one of a first form if the information is measurable by the scale and a second form if the information is not measurable by the scale.

23. A method of conveying information using an electronics display instrument, the method comprising:

receiving display information yielded from a comparison of a first information and a second information;

displaying, on the electronics display instrument, the display information with a symbol on a scale, the scale having a limited range including a first extreme, a second extreme and a central position therebetween;

positioning the symbol at the central position to indicate a first condition, and positioning the symbol at the first or second extreme positions to indicate a deviation from the first condition in a first or second direction by an amount at least equal to the scale; and

varying a symbol appearance depending on whether the display information is measurable by the scale having the limited range.

24. The method according to claim 23 , further comprising:

displaying the symbol appearance in one of a first form if the display information is measurable by the scale and a second form if the display information is not measurable by the scale.