Exercise 12.3: Weather Radar - Garmin G1000 Manual

Exercise 12.3: Weather Radar

1. Does the GWX 68 Airborne Weather Radar allow you to operate while on the ground?
Yes, however, a caution will appear alerting the pilot to follow all safety precautions.
WARNING: Begin transmitting only when it is safe to do so. If it is desired to transmit
while the aircraft is on the ground, no personnel or objects should be within 11 feet of the
antenna.
2. Describe WATCH™.
Weather Attenuated Color Highlight (WATCH ™) is 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. This has an effect on the return intensity. Accuracy of the
displayed intensity of returns located in gray shaded areas are suspect.
3. Is it safe to continue a flight into a gray shaded area?
It is never safe to continue flight into shaded area; weather information for shaded areas
is indeterminate.
4. After adjusting the gain manually, why is it important to return the gain setting to the
calibrated value?
Changing the gain will cause precipitation intensity to be displayed as a color not
representative of the true intensity. One must return the gain to the calibrated value for
the actual intensity of precipitation.
5. How does one activate or deactivate the bearing line?
1. Press the MENU Key.
2. Turn the large FMS Knob to select "Show Bearing Line" or "Hide Bearing Line".
3. Press the ENT Key.
190-00368-05 Rev. B GIFD Pilot's Training Guide 43