12-52
GTN 725/750 Pilot’s Guide
190-01007-03 Rev. Q
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
12.4.7 Weather Radar Menu
Touching
Menu
opens the Weather Radar menu. With the
exception of Sector Scan, all selections are on/off only.
GWX 68
GWX 70
Figure 12-68 Weather Radar Menu Selections
NOTE:
In software prior to v6.50, Ground Clutter Suppression (GCS) and
Turbulence Detection are only supported for 12” or larger RADAR antennas.
Turbulence Detection is only supported out to a range of 40 NM and is
disabled at display ranges greater than 160 NM.
12.4.7.1 Weather Attenuated Color Highlight (WATCH™)
While in horizontal scan mode, this feature can be used as a tool to determine
areas of possible inaccuracies in displayed intensity due to weakening of the
radar energy. This weakening is known as “attenuation.” The radar energy
weakens as it passes through areas of intense precipitation, large areas of lesser
precipitation, and distance. Issues with the radome will also attenuate the radar
energy. All these factors have an effect on the return intensity. The more energy
that dissipates, the lesser the displayed intensity of the return. Accuracy of the
displayed intensity of returns located in the shaded areas are suspect. Make
maneuvering decisions with this information in mind. Proper antenna tilt
management should still be employed to determine the extent of attenuation in
a shaded area.
1. While viewing the Weather Radar menu, touch
WATCH Shading
to toggle WATCH Shading.
To deactivate WATCH mode, touch the key again.
