Garmin GTN 750 Pilot's Manual page 244

Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Music
Utilities
System
Messages
Symbols
Appendix
11-18
Index
Figure 11-15 Negative Climb Rate (NCR) Altitude Loss
"TOO LOW, TERRAIN"
Figure 11-16 Negative Climb Rate (NCR) Sink Rate
Garmin GTN 725/750 Pilot's Guide
"DON'T SINK"
"TOO LOW, TERRAIN"
Altitude Loss (Feet)
"DON'T SINK"
or
Sink Rate (FPM)
or
190-01007-03 Rev. B