Avionic system and method for selectively preventing and enhanced ground proximity warning system alert mode from generating an alert

A method for selectively preventing an alert mode implemented in an enhanced ground proximity warning system from generating an alert, the method comprising the steps of:

• retrieving from a cruise altitude data source, using the enhanced ground proximity warning system, cruise altitude data that is indicative of a cruise altitude of an aircraft;
• retrieving from a take-off altitude data source, using the enhanced ground proximity warning system, take-off altitude data this is indicative of a take-off altitude of the aircraft;
• processing, in the enhanced ground proximity warning system, the cruise altitude data and the take-off altitude data to determine if the cruise altitude is below the altitude from which the aircraft is taking off;
• and
• when the cruise altitude is below the altitude from which the aircraft is taking off, preventing the alert mode implemented in the enhanced ground proximity warning system from generating the alert until the aircraft is substantially at the cruise altitude.

A non-transitory computer-readable medium having computer-executable instructions stored thereon that, when executed by an enhanced ground proximity warning system, cause the enhanced ground proximity warning system to:

• retrieve cruise altitude data from a cruise altitude data source, the cruise altitude data indicative of a cruise altitude of an aircraft;
• retrieve take-off altitude data from a take-off altitude data source, the take-off altitude data indicative of a take-off altitude of the aircraft;
• process the cruise altitude data and the take-off altitude data to determine if the cruise altitude is below the altitude from which the aircraft is taking off;
• and
• when the cruise altitude is below the altitude from which the aircraft is taking off, prevent an alert mode implemented in the enhanced ground proximity warning system from generating an alert until the aircraft is substantially at the cruise altitude.