Avidyne IFD540 Pilot's Manual page 94

 METARs – These are available in both text and
graphical formats and represent recent surface
weather
presented on the "Info" tab of the "FMS" page. The
graphical METARs are color-coded flag symbols
that
observation and can appear as overlays on the
Map and embedded in the flight plan on the Flight
Plan tabs and Nearest tabs. These flags allow an
overview of general weather conditions in an area.
Graphical METAR Legend
AIRMETs and SIGMETs (US only) – These are

areas where the National Weather Service has
issued advisories for various types of hazardous
weather. They are depicted on the Map page
along with an abbreviated description of the
hazard, such as "ICE" (icing), "MTN" (mountain
obscuration),
conditions).
AIRMETs and SIGMETs Detail
3-18 Map Pages
observations.
summarize a
or
Text METARs
recent surface
"IFR" (instrument
are
weather
flight