Garmin G1000 Cockpit Reference Guide for the Columbia 350/400190-00567-01 Rev. A 10-13SECTION 10 – HAZARDAVOIDANCEExcessive Descent Rate Alert (EDR)The purpose of the Excessive Descent Rate alert is toprovide suitable alerts when the aircraft is determinedto be closing (descending) upon terrain at an excessivespeed. Figure 10-19 displays the correlation betweenheight above terrain and descent rate, resulting in the twoEDR alerts. EDR alerts have two levels of severity, caution(sink rate) and warning (pull-up).600055005000450040003500300025002000150010005000 2000 4000 6000 8000 10000 12000"PULL UP""PULL UP""SINK RATE"Descent RateHeight Above Terrain (Feet)Figure 10-19 Excessive Descent RateNegative Climb Rate After TakeoffAlert (NCR)The purpose of the Negative Climb Rate After Takeoffalert is to provide suitable alerts to the pilot when thesystem determines that the aircraft is losing altitude(closing upon terrain) after takeoff. The aural message“Don’t Sink” is given for NCR alerts, accompanied by anannunciation and a pop-up terrain alert on the display.1000800600400200Height Above Terrain (Feet)Altitude Loss (Feet)0 20 40 60 80 100 120 140“DON’T SINK”“DON’T SINK”Figure 10-20 Negative Climb Rate1000900800700600500400300200100Height Above Terrain (Feet)Sink Rate (Feet Per Minute)0“DON’T SINK”“DON’T SINK”500 1000 1500 2500 35002000 3000 4000“Five-Hundred” Aural AlertThe purpose of the aural alert message “Five-hundred”is to provide an advisory alert to the pilot that theaircraft is five-hundred feet above terrain. When theaircraft descends within 500 feet of terrain, the auralmessage “Five-hundred” is heard. There are no displayannunciations or pop-up alerts that accompany the auralmessage.
