Horizontal evasion guidance display methods and systems

1. A method for displaying information on a display device associated with a vehicle, the method comprising:

determining a horizontal adjustment for the vehicle based at least in part on an output from a collision avoidance system;

displaying, on the display device, a target zone on a forward-looking perspective view display at a position on the forward-looking perspective view display offset from a reference position of a second graphical indication of a current orientation of the vehicle in a horizontal dimension, wherein a horizontal distance between the position of the target zone and the reference position of the second graphical indication in the horizontal dimension corresponds to the horizontal adjustment; and

displaying, on the display device, an avoidance zone adjacent to the target zone on the forward-looking perspective view display, wherein a vertical dimension of the avoidance zone increases as a second horizontal distance from the target zone increases.

2. The method of claim 1 , the output of the collision avoidance system comprising a target heading, wherein determining the horizontal adjustment comprises determining a roll adjustment based on a relationship between the target heading and a current heading of the vehicle.

3. The method of claim 2 , wherein:

the second graphical indication comprises a vehicle reference symbol; and

the horizontal distance between the position of the target zone and the vehicle reference symbol corresponds to the roll adjustment from a current bank angle of the vehicle.

4. The method of claim 2 , the second graphical indication comprising an ownship symbol on the forward-looking perspective view display, wherein the horizontal distance between the target zone and the ownship symbol in the horizontal dimension corresponds to the roll adjustment.

5. The method of claim 1 , wherein:

the vehicle comprises an aircraft;

the forward-looking perspective view display comprises a primary flight display;

the target zone is rendered on the primary flight display using a first visually distinguishable characteristic; and

the avoidance zone is rendered on the primary flight display using a second visually distinguishable characteristic different from the first visually distinguishable characteristic.

6. The method of claim 1 , further comprising dynamically updating the horizontal distance between the position of the target zone and the reference position of the second graphical indication on the forward-looking perspective view display in response to a change in an orientation of the vehicle.

7. A flight deck display for an aircraft, the flight deck display having rendered thereon a primary flight display comprising:

an attitude indicator on a forward-looking perspective view display;

an aircraft reference symbol with respect to the attitude indicator on the forward-looking perspective view display to indicate a current attitude of the aircraft;

a graphical indication of a target zone for the aircraft on the forward-looking perspective view display, wherein the graphical indication of the target zone is offset from the aircraft reference symbol by a horizontal distance in a horizontal dimension corresponding to a horizontal adjustment for the aircraft determined based at least in part on a relationship between a current heading of the aircraft and an output from a collision avoidance system; and

a second graphical indication of an avoidance zone on the forward-looking perspective view display adjacent to the target zone, wherein a vertical dimension of the second graphical indication of the avoidance zone increases as the horizontal distance from the graphical indication of the target zone increases.

8. The flight deck display of claim 7 , wherein the avoidance zone emanates from the target zone in a horizontal direction corresponding to a potential collision threat indicated by the collision avoidance system.

9. The flight deck display of claim 7 , wherein:

the output from the collision avoidance system comprises a target heading;

the horizontal adjustment comprises a roll adjustment determined based on a current aircraft speed and a difference between a current bank angle and a commanded bank angle to achieve the target heading; and

the horizontal distance dynamically decreases in response to the aircraft rolling towards the target zone.

10. The flight deck display of claim 7 , wherein the horizontal distance between a center of the graphical indication of the target zone and a center of the aircraft reference symbol corresponds to the horizontal adjustment.

11. The flight deck display of claim 7 , wherein a vertical distance between a center of the graphical indication of the target zone and a center of the aircraft reference symbol corresponds to a targeted pitch for the aircraft.

12. The flight deck display of claim 7 , wherein the second graphical indication comprises trapezoidal zone symbology that converges at the target zone to emulate a forward-looking perspective view of the avoidance zone.

13. A non-transitory computer-readable medium having instructions stored thereon that are executable by a processing system to render a primary flight display on a display device coupled to the processing system, wherein the primary flight display comprises:

an attitude indicator on a forward-looking perspective view display;

an aircraft reference symbol with respect to the attitude indicator on the forward-looking perspective view display to indicate a current attitude of an aircraft;

a target zone on the forward-looking perspective view display, wherein the target zone is offset from the aircraft reference symbol by a horizontal distance in a horizontal dimension corresponding to a horizontal adjustment for the aircraft based at least in part on a relationship between a current heading of the aircraft and an output from a collision avoidance system; and

a horizontal avoidance zone on the forward-looking perspective view display adjacent to the target zone, wherein a vertical dimension of the horizontal avoidance zone increases as the horizontal distance from the target zone increases.

14. The non-transitory computer-readable medium of claim 13 , wherein the horizontal distance between a center of the target zone and a center of the aircraft reference symbol corresponds to the horizontal adjustment.

15. The non-transitory computer-readable medium of claim 13 , wherein a vertical distance between a center of the target zone and a center of the aircraft reference symbol corresponds to a targeted pitch for the aircraft.

16. The non-transitory computer-readable medium of claim 13 , wherein the horizontal avoidance zone comprises trapezoidal zone symbology that converges at the target zone to emulate a forward-looking perspective view of an avoidance zone.

17. The non-transitory computer-readable medium of claim 13 , wherein the instructions are executable by the processing system to determine a roll adjustment for the aircraft based on a current aircraft speed and a difference between a current bank angle and a commanded bank angle to achieve a target heading from a current aircraft heading, wherein the horizontal distance corresponds to the roll adjustment.

18. The non-transitory computer-readable medium of claim 13 , wherein:

the output comprises a target aircraft heading output by the collision avoidance system; and

a width of the target zone corresponds to a width of the aircraft reference symbol so that the aircraft reference symbol fits horizontally within the target zone when a current aircraft heading is aligned with the target aircraft heading.