6
190-00607-02 Rev C
Detailed Operation
GDL 69/69A - FIS
XM FIS Forecast Surface Analysis
City
When enabled, the City forecast shows current or
forecast conditions in available cities. Forecasts are
available for intervals of 12, 24, 36, and 48 hours.
This menu item key enables or disables this product.
Use the menu item key below the
City
key to select
the current or forecast time. The update rate is every
12 minutes.
Forecast Time
The forecast time range can be selected to cover the
Current
conditions,
12 Hours
,
24 Hours
,
36 Hours
,
or
48 Hours
. Each press of the Forecast Time key will
step through times.
SIGMET
When enabled, SIGMETs (SIGnificant METeo-
rological Information) advise the pilot of potentially
hazardous weather, other than convective activity,
to all aircraft. The advisory covers an area of at least
3,000 square miles at any one time. SIGMET data
covers icing, turbulence, dust, and volcanic ash as
issued by the National Weather Service. The update
rate is every 12 minutes.
XM FIS AIRMET and SIGMET Legend
Refer to the Legend for a description of the color coding.
1. Press the
Å
or
Æ
arrow keys to dsplay the
legends for the selected servces.
2. Press
Done
to turn the Legends off.
AIRMET
AIRMETs (AIRman’s METeorological Information)
advises the pilot of weather that may be hazardous to
single engine, other light aircraft, and Visual Flight
Rule (VFR) pilots. This advisory affects an area of a
least 3,000 square miles at any one time and provides
data about ceiling, obscuration, and turbulence issued
by the National Weather Service (NWS). The update
rate is every 12 minutes.
When enabled, the following AIRMETs are avail-
able for display:
•
Icing
•
Turbulence
•
IFR conditions
•
Mountain obscuration
•
Surface winds
Refer to the Legend for a description of the color
coding.
1. Press the
Å
or
Æ
arrow keys to dsplay the
legends for the selected servces.
2. Press
Done
to turn the Legends off.
Press the
Next Page
key to display the next page
of menu items.