Garmin GTN 625 Pilot's Manual page 423

11.4.11 Icing
NOTE: Due to the incremental and overlapping nature of the FIS broadcast,
timestamps, regional coverage, and map data availability may vary with
altitude for computer generated icing forecasts.
Icing potential is not a forecast, but a presentation of icing potential at the
time of analysis. For FIS-B, the icing timestamp shows the valid time in UTC.
Supercooled Large Droplet (SLD) icing conditions are characterized by the
presence of relatively large, super cooled water droplets indicative of freezing
drizzle and freezing rain aloft. SLD threat areas are depicted as black and pink
blocks over the icing colors.
The icing potential shows a graphic view of the current icing conditions.
Categories vary depending on the configured weather source. For FIS-B, they
include: Trace, Light, Moderate, and Heavy.
Altitude Range: 2,000 to 24,000 ft.
1. While viewing the FIS-B Weather menu, touch the
Icing key.
190-01004-03 Rev. P
Figure 11-96 FIS-B Icing
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