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A terrain warning system includes an indicator to inform a pilot of a proposed degree of flight parameters for safely clearing terrain. An aural message may identify a vertical speed that may be used to safely traverse terrain to the pilot. A visual indicator on a display informs the pilot of a vert

A terrain warning system includes an indicator to inform a pilot of a proposed degree of flight parameters for safely clearing terrain. An aural message may identify a vertical speed that may be used to safely traverse terrain to the pilot. A visual indicator on a display informs the pilot of a vertical speed or climb angle to traverse terrain. The display may be a vertical speed indicator also capable of displaying traffic advisories.

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1. A method for reducing a risk of an aircraft colliding with terrain, the method comprising: comparing, with a processor, one or more terrain avoidance profiles with terrain information to determine with the processor whether a terrain threat exists; andafter the terrain threat is determined to exi

1. A method for reducing a risk of an aircraft colliding with terrain, the method comprising: comparing, with a processor, one or more terrain avoidance profiles with terrain information to determine with the processor whether a terrain threat exists; andafter the terrain threat is determined to exist, communicating, with one or more of a video output device and an audio output device, first indicia to a pilot identifying that the terrain threat exists and communicating with one or more of the video output device and the audio output device second indicia to the pilot identifying a range of change in a flight parameter of the aircraft to traverse particular terrain, the range of change in the flight parameter being identified based on a plurality of values of the flight parameter. 2. The method of claim 1 wherein the second indicia represents a range of vertical speed to traverse the particular terrain. 3. The method of claim 2 wherein the first indicia comprises a warning alert. 4. The method of claim 2 wherein the first indicia comprises a caution alert. 5. The method of claim 1 wherein the second indicia represents a range of climb angle to traverse the particular terrain. 6. The method of claim 2 wherein the second indicia is provided on a vertical speed indicator display. 7. The method of claim 2 wherein the second indicia is provided on a vertical speed indicator capable of displaying traffic advisories. 8. The method of claim 1 wherein comparing one or more terrain avoidance profiles with terrain information is performed by a terrain and traffic collision avoidance processor. 9. The method of claim 1 wherein the second indicia comprises an audible message. 10. A computer program product for reducing a risk of controlled flight into terrain, the computer program product stored in a non-transitory tangible medium and comprising machine-readable code for: comparing, with a processor, a terrain avoidance profile with terrain information to determine with the processor whether a potential collision with terrain exists;generating, with one or more of a video output device and an audio output device, a terrain alert signal indicative of a terrain threat; andgenerating, with one or more of the video output device and the audio output device, a terrain avoidance signal indicative of a range of change in a flight parameter to traverse particular terrain, the range of change in the flight parameter being identified based on a plurality of values of the flight parameter. 11. The computer program product of claim 10 wherein the signal is further indicative of a range of thrust. 12. The method of claim 1 wherein comparing and communicating the second indicia are repeated to update the range during the traverse of the particular terrain. 13. The method of claim 1 wherein the second indicia represents a range of aircraft bearing. 14. The method of claim 1 wherein the second indicia represents a range of bank angle. 15. The method of claim 1 wherein the second indicia represents a range of thrust. 16. The method of claim 1 wherein the second indicia represents a range of at least one of vertical speed, climb angle, aircraft bearing, bank angle, and thrust as determined in accordance with a control operable by the pilot. 17. The method of claim 1 wherein the range comprises a minimum change in the flight parameter determined in accordance with a control operable by the pilot. 18. The computer program product of claim 10 wherein the range comprises a minimum change in the current flight determined in accordance with a provided control operable by the pilot. 19. The computer program product of claim 10 wherein the signal is further indicative of a range of at least one of vertical speed, climb angle, aircraft bearing, bank angle, and thrust as determined in accordance with a provided control operable by the pilot. 20. The computer program product of claim 10 wherein the terrain avoidance signal comprises indicia of a range of pull up rate. 21. The computer program product of claim 10 wherein the terrain avoidance signal comprises a range of vertical speeds. 22. The computer program product of claim 10 wherein the terrain avoidance signal comprises a range of climb angles. 23. The computer program product of claim 10 wherein the terrain avoidance signal comprises indicia of a range of aircraft bearing. 24. The computer program product of claim 10 further comprising machine- readable code for providing a traffic alert. 25. The computer program product of claim 20 wherein the indicia of range of pull up rate comprises an audible sound. 26. The computer program product of claim 10 wherein generating a terrain alert signal continues for a period of time and generating a terrain avoidance signal updates the range during the period. 27. The computer program product of claim 10 wherein the signal is further indicative of a range of bank angle.