190-00709-00 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
6-49
HAZARD AVOIDANCE
GROUND MAPPING AND INTERPRETATION
A secondary use of the weather radar system is for the presentation of terrain. This can be a useful tool for
verifying aircraft position. A picture of the ground is represented much like a topographical map that can be
used as a supplement to the navigation map on the MFD.
Ground Map mode uses a different gain range than Weather mode. Different colors are also used to represent
the intensity levels. The displayed intensity of ground target returns are defined in the table below. Use of the
GAIN
and
TILT
controls helps improve contrast so that specific ground targets can be recognized more easily.
As previously discussed, the type and orientation of the target in relation to the aircraft affects the intensity
displayed.
When the weather radar system is in either the Weather or Ground Map mode, the system automatically
switches to Standby mode upon landing.
Ground Map
Mode Color
Intensity
Black
0 dB
Light blue
> 0 dB to < 9 dB
Yellow
9 dB to < 18 dB
Magenta
18 dB to < 27 dB
Blue
27 dB and greater
Table 6-4 Ground Target Return Intensity Levels
Operation in Ground Map Mode
1)
Select the
MODE
Softkey.
2)
Select the
GROUND
Softkey to place the radar in Ground Map mode.
3)
Select the
BACK
Softkey.
4)
Press the
FMS
Knob to activate the cursor.
5)
Turn the large
FMS
Knob to place the cursor in the TILT field.
6)
Adjust the antenna tilt angle by turning the small
FMS
Knob to display ground returns at the desired distance.
7)
Press the
FMS
Knob to remove the cursor.
