Garmin Appliance Data User's Guide Page 19

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13
Part Two: Section 2
XM Weather
Winds Aloft (WINDS). The Winds Aloft
selection provides the pilot with wind speed
and direction. The winds at a given altitude
are selected in the Winds Aloft Alt below the
WINDS selection. The selected altitude is shown
along with the product time.
Textual Meteorological Aerodrome Reports
(METARs). When you zoom in to show the air-
port symbol associated with the colored flag for a
graphical METAR, and move the Map Pointer to
highlight that airport, you can then press ENT to
see the Textual METAR page for that airport. The
Textual METAR page is one of the airport pages
of the WPT page group.
Graphical Meteorological Aerodrome Reports
(METARs). The XM Weather page (in the NAV
page group) can show colored flags to indicate
the level of current weather conditions at those
airports for which textual METAR reports are
available. The flags are color-coded to indicate
the severity of the current weather at the airport:
cyan for VFR conditions, green for Marginal VFR
conditions, yellow for IFR conditions, or magenta
of Low IFR conditions.
Terminal Aerodrome Forecast (TAFs). A TAF
page is added among the airport pages of the
WPT page group. The TAF page differs from the
Textual METAR page in that it describes forecast
future weather conditions rather than current
conditions.
Temporary Flight Restrictions (TFRs). The
boundaries of areas with TFRs are outlined in
yellow on the Map and XM Weather pages of
the NAV page group. In the 500W-series, TFR
boundaries are also shown on the NAV main
page. You can obtain more information about a
TFR by bringing up the map cursor, moving the
map cursor to within the yellow outlined area,
and pressing the ENT key.
Weather Product Age
The age of the displayed weather product—or the
effective time of Winds Aloft predictions—is shown in the
upper right corner of the display. For example, if NEXRAD
is displayed, “0:05” indicates that the data are five minutes
old. If Winds Aloft predictions are being displayed, “10:00”
indicates the effective time for the displayed prediction is
10:00 AM.
The data for each XM Weather product are updated
regularly from the GDL 69/69A. XM Weather products
expire after the following intervals:
Product Expiration Interval
METARs 90 minutes
NEXRAD/Radar Coverage 30 minutes
TFRs 60 minutes
TAFs 60 minutes
Lightning 30 minutes
SCITs 30 minutes
Winds Aloft Predictions 90 minutes
When the age of the displayed XM Weather product
reaches one half of its expiration time, the color of the
displayed time changes from green to amber. Expired XM
Weather products are never displayed. In the unlikely
event that the data should expire before a fresh update
is received, the time will be dashed out and the data
removed from the display.
NOTE: Product age for individual reports of
XM AIRMETs, SIGMETs, City Forecasts, County
Warnings, Cell Movement and TFRs are not
provided by XM Weather Service.
190-00356-30 Rev L
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